-
بهمن یزدی
صمدی
author
سید علی
پیغمبری
author
text
article
2000
per
In order to determine the effect of three sowing dates and three seedling rates on agronomic characteristics of a lentil cultivar (Ziba), an
experiment was conducted in the agricultural farm of Tehran University at Karaj during 1992-1994. The traits studied were time from sowing to 50% !lowering, time from sowing to 90% maturity,100 seed weight (g), and seed yield (g/10mz). Simple and compound analysis of variance for seed yield
showed that varIOUS sowi,ng dates and sowing date x year interaction were significant at the 1 % level of probability. In these studies the optimum sowing
date was December and the best seedling rate was found to be 60 to 65 Kglha. Treatment means were calculated and compared, using Duncan's Multiple
Range Test.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13126_902ddba9a263690360d6c43cf53b4cc9.pdf
-
شهرام
دخانی
author
صمدصبوری
هلستانی
author
رضا
شکرانی
author
text
article
2000
per
Four cultivars of olive, Kalamata, Marri, Zard and Fishmi, obtained from Roodbar city were treated with two methods, natural and controlled
fermentation with Lactobacillus plantarum as a starter culture at 25 :t 1 °C for 100 days. HPLC analysis experiments were conducted during the whole study. Individual sugar, sucrose, fructose and glucose was determined by HPLC. The results indIcated that glucose was significant (P
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13127_55d4e3d8f689f31175bb121fbd98980a.pdf
-
کمال قاسمی
یزدی
author
سیروس عبد
میشانی
author
عبدالهادی حسین
زاده
author
بدرالدین ابراهیم سید
طباطبایی
author
text
article
2000
per
In this study, Random Amplified Polymorphic DNA (RAPD) analysis was used to investigate the polymorphisms of upland cotton genotypes. Twenty six genotypes were analyzed with 90 random decamer primers using the Polymerase Chain Reaction (PCR). Twenty one primers detected polymorphism in all the 26 cotton genotypes. A total of 237 bands were amplified, 219 of which (92.4%) were polymorphic. Thirteen primers, clearly polymorphic, were used to estimate the genetic distances between genotypes. Cluster analysis by unweighted pair group method of arithmetic means (UPGMA), after multivariate analysis using Jaccard's similarity coefficients, showed that 26 genotypes could be placed in six groups. Similarity matrix data revealed that genotypes 82203-189 and Siokra-324 are 10.4% similar while
Early Mutagenesis and Bakhtegan are 43.6% similar.
The coefficient of
similarity of most of the other genotypes ranges between 15 and 35%. Results indicated a genetic relationship between genotypes of different origins including American and control Sahel cultivar. This relationship was probably due to similarity of the center of origin of these genotypes. In general, results
indicated that the RAPD analysis is a powerful tool in detecting the genetic relationships between cotton genotypes.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13128_4a1d9f0f6e4ab5d419a052d1904bc72c.pdf
-
بابک
ناخدا
author
ابوالحسن هاشمی
دزفولی
author
ناصر بنی
صدر
author
text
article
2000
per
In order to study the effects of water stress on quantitative and qualitative yield of pearl millet, this experiment was conducted in the Spring of 1995 at Seed and Plant Improvement Research Institute field station in Karaj. The design of this experiment was a randomized complete block design with four treatments and four replicatoions. In this research, the effects of four irrigation intervals on the basis of relative water content (R WC), at four ranges of 95-90%, 85-80%, 75-70%, and 65-60%, were studied. Effects of these treatments on quantitative yield included fresh weight (FW), dry weight (DW), leaf dry weight (LDW), stem dry weight (SDW), and protein yield (PY) and on qualitative yield such as leaf/stem, crude protein (CP), crude fiber (CF), and ash percentage of forage millet "Nutrifeed" were evaluated. Results indicated that aU characters under study were affected by water stress and there were significant negative correlations among characters with treatments imposed. The check treatment (irrigated at R WC= 90-95%) with production of 12.58 kglm2 fresh forage and 357.89 glm2 crude protein had better responses considering all the quantitative and qualitative characters as compared with stress treatments. In comparison of two cuttings, the second
cutting in spite of reduction in forage quantity (4.11 kg/m2 fresh forage a_ compared with 5.18 kg/mZ in first cutting) had better quality in cmparison with the first cutting (15.36% crude protein as compared with 13.80% in the first cutting
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13129_e95a08b1ca82ba9f1fc8e281d403e59a.pdf
-
حمداله کاظمی
اربط
author
رحیمزاده
خویی
author
محمدمقدم
author
اصغربنالی
خسرقی
author
text
article
2000
per
Effects of different levels of nitrogen and phosphorous fertilizers and irrigation intervals on some agronomic traits of Speedfeed, a forage sorghum
variety, were studied in a split plot design for two years in two locations-Karaj and Khossrovshahr. Combined analysis of data showed that differences between years and location were significant for all traits studied, but yearlocation interactons for the traits were non-significant. Different levels of
phosphorous did not affect fresh-feed, dry-feed yield, plant height and tiller number significantly, while phosphorous year interaction in relation to tiller
number was significant. Significant differences between nitrogen levels as well as between irrigation intervals for fresh-feed yield and dry-feed yield were obtained. Highest fresh and dry-feed yield, as well as plant height were obtained when 8 day irrigation intervals were applied. Diffierence between this interval with other irrigation intervals was significant for these traits. Applying 200 Kg N/ha produced highest dry and fresh-feed yield, but it was not significantly different fll)m 150 Kg N/ha treatment.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13130_8a8e5d6c506300e54cccbad6dc16dc85.pdf
-
ناصردواتگر
author
محمدرضا
نیشابوری
author
محمد
مقدم
author
text
article
2000
per
In order to analyse the spatial variabiltity of particle size distribution, organic matter, available phosphorous and potassium in long-term plot fields (treated with potassium, phosphorous and nitrogen at different levels) and potassium plot fields (uniform fertilizer application), soils were sampled in rectangular grids. Results have shown, in spite of small area in both cases, variations not only depend on the place but also on geographical direction (non-isotropic). All variables except avaialable phosphorous followed a linear semivariogram model. The available phosphorous showed nugget effect model
indicating the presence of random variation corresponding to its distribution with in trial treatment. Organic matter and available potassium weren't affected by fertilizer applications in long-term plots and showed spatial dependence due to physiographic conditions and probably irrigation method. The extent of soil heterogenity causing the adoption of random complete
block design was not lit for variance analysis and emphasized the necessity of
use of covariance analysis methods. Silt and clay variables emphasizes showed high nugget variance in both fields indicating more random than symmetrical variations in toal variance. Sand, available potassium and organic matter
followed spherical semivariogram model, their ranges were 19, 11, 15 metter, respectively. As far as these distances, variations were spatial and systematic whiele after that random. Therefore, these distance are economically leasible for sampling and are also of adequate precision.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13131_0a19977dfd1e6ff3e32b9cf9c983ac55.pdf
-
کریم حداد ایرانی
نژاد
author
کریم
کمالی
author
حسن ملکی
میلانی
author
text
article
2000
per
Faunal study was conducted in cotton fields of _loghan Plain, during
1996 resulting in the identification of 12 species, 12 genera and 8 families belonging to the Pycnonotic brachypyline oribatids. The following 6 families
together with their genera and species are new records for the acari fauna of Iran: Anderemaeidae: Cristeremaeus humeratus Balogh et Csiozar, 1963;
Eremellidae : Eremella ensifera Balogh et Mahunka, 1968; Eremobelbidae : Eremobelba sp. Berlese, 1908; licnodamaeidae: Licnodamawus granulatus
Balogh et Csiszar, 1963; Microzetidae: Berlezetes brazilozetoides Balogh et Mahunka, 1981; Autognetidae: Austrogneta sp. Balogh et Csiszar, 1963. Also
the following genera and species of Oppiidae: Rectoppia dispariseta (Hammer, 1958), Chavinia similis P. Balogh, 1984, Aeroppia adjacens Mahunka. 1985,
Austroppia magellanis (Hammer, 1962), Multioppia stellifera Hammer, 1961, 1\110 radiata Hammer, 1961. are new for the Moghan region. The family
oppiidae with 5 genera and 6 species were of the highest diversity while families Eremobelbidae and Autognetidae each with only one genus possessed
the lowest diversity.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13132_0bde000553dc7a8a12a4cfcbb70611e6.pdf
-
قدرت اله
فتحی
author
کورش رضایی
مقدم
author
سید عطااله
سیادت
author
text
article
2000
per
Path analysis of characters affecting grain yield of rice with nitrogen spliting was studied in field experiment. The experiment was conducted as a split plot design in randomized complete block with 4 replications in Ramin Agriculture Research and Education school, Ahwaz university during 1997-98. Mainplots were split rate of N application in five levels at 4 grwoth stage (Pb P2, P3, P 4, Ps). Statistical analysis indicated that there was a signficant difference within various split rate of N for grain yield and yield components. Maximum yield was obtained for Amol3 cultivars compared to Anboori. However, Anboori had highest biological yield, desirable tillering and high plant height. Lower yield of Anboori partly was related to lower source of plant. Results of experiment indicated that highest yield obtained with split rate of N at P3 and P 4 application with yield of 3.4 and 3.1 t!ha yield, respectively. The results of this study showed that V 2P 4 and VIP 3 had highest grain yield (4.100 and 2.951 t!ha respectively). Number of spike in m2 and 1000 grain weight had positive correlation with grain yield. Among Yield components, number of spike in m2 showed positive direct (0.319) and indirect (0.072) effects on grain yield, and the indirect effect was more than other character. A path ananlysis indicated that spike number in m2 and grain number in spike had the largest direct effect on grain yield and these characters could be used in selection of high yielding
rice cultivars in response to N fertilizer
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13133_282af9118d4714b008c1026cf4354c3e.pdf
-
سید حسین حسینی
مقدم
author
ناصرامام
جمعه
author
عباس
گرامی
author
text
article
2000
per
Heritability and genetic correlation coefficients were evaluated for single cocoon weight(sew), single shell cocoon weight(ssew) and cocoon shell percentage( csp) traits in four commertial varieties of silkworm. Also realized heritability was estimated for ssew. Heritabilityt h2) of ssew for varieties 101,102,1.03 and 104 were 0.27( :to.058), 0.48 (:to.080),0.39( :to.070) and 0.36( :to.O66) respectively. Also h2 of sew for these four varieties were 0.39( :to.074 ),0.34( :to.080),0.50( :to.082),0.38( :to.068) while h2 of csp were 0.16( :to.040),O.:. 7( :to.O67),0.26( :to.053) and 0.25( :to.050) respectively.
Realized heritabili"y 01 ssew obtained from one-way selection for these four varieties (v/ith tlh' same order) 'verf' O.16_,0.465,0.284 and 0.369. Heritability of sscw for female was more P::)Dounced than for male but h2 of sew for female was lower than tha_ kir J-. ,.:.1:', Genetic correlation coefficient of sew
and sscw was high(O.-:-.::t0.O40).
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13134_4aaf379b21d203eda7e320182c36c296.pdf
-
محمد عبدالهی عزت
آبادی
author
غلامرضا
سلطانی
author
text
article
2000
per
In this study, time allocation in rural households was-inYestigated. The results showed that time allocation patterns are not the same among all
farmers. Factors such as, sex, education, and season affect this pattern. Work and leisur substitute each other this substitution not being necessarily based on a profit maximization goal. It is usually based on a goal of household utility maximization. Sixty two percent of sample farmers have off-farm jobs. Physical capitals such as land and others tend to decrease probability of having off-farm
work, whereas human capitals such as literacy increase them. This implies that, investment in education without paying attention to increasing investment in agriculture, is likely to speed rural migration in Rafsanjan Region. The results,
on the other hand, show that having off-farm work helps farmers to be more rational in their decisions.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13135_7367d792d4017f4aa91408e1513895f2.pdf
-
فرشاد
بختیار
author
رضابزرگی
پور
author
text
article
2000
per
In this study,In order to develop doubled haploid lines of wheat, a chromosome elimination method involving crosses between wheat and maize
was employed. The plant materials used were F1 seeds of wheat from crosses between NavidxBezostaya (NB) and IniaxKarajl (IK) along with four Maize genotypes; HI =SKC 108, H3=KSC 301, H7=CS 704 and sinika 60. Finally 60
lines of wheat doubled haploid were obtained. In order to investigate the quality of seed storage proteins, 47 doubled haploid lines of wheat, parents,
F1 seed's and chinese spring and Markuis varieties were studied using eiectrophoretic analysis. In order to seperate the glutenin subunit's
SDS-PAGE method with 10% gel(WN) was used. The total of 11 subunits in three gene locations were observed .Null subunit with 75.4 present and 6+8
subunit with 4.3 present had the highest and the lowest frequencies respectively. In the lines studied, several unespected gene locations were also
observed.Finaly lines under investigation were graded for glutenin quality fractions. A number of doubled haploid lines had better quality grades
cvlllpart;d to the parents and FI seeds
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13136_79d470bbd8ee02d53cf666184747cfc4.pdf
-
حمید
آماده
author
سعید
یزدانی
author
text
article
2000
per
The policy making in agriculture requires economic tools as well as real information about behavior of important economic variables in production
processes. Elasticitic:-- are economic tools which indicate behavior of economIc variahles. One of the most important elasticities that indicates the "lIhstitution
re1ations of different production J_1(;tors. is substitution elasticity. In order to estimates this elasticity, production functions such as CES production have often
been used. There are some limitations and problems in application of usual production function, such as procudtion function specification and constant elasticity
assumption. The CRESH production function which estimate this elasticity indirectly, is one of the few efficient functions in this respect. Assuming cost
minimizing behavior for wheat growers. the application of input demand functions
would enable us to get the price and substitution elasticities of inputs. In this article, price and substitution elasticities have been estimated using cross sectional data.
Results, show that machine price elasticity. 0.095, is the lowest and the same for seed is 0.237. The greatest. furthermore, substitution elasticities between seed and
labor, seed and machine, and machine and labor, are 0.55 I , 0.173, and 0.2007 ,
respectively.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13137_bae30ee6260c922de25634dc2fe47073.pdf
-
افشین اسماعیلی
فر
author
غلامحسین
مصاحبی
author
مجتبی
محمدی
author
محمود
اخوت
author
جواد
زاد
author
text
article
2000
per
To detect the presence of TS\VV in Tehran province, tomato plant samples suspected of TSWV infection were collected from various regions in the province.
Tomato leaf sap was extracted and mechanically transmitted through several plant spesies including: Petunia hybrida. Nicotiana glutinosa, N. rabacllm cv. Samsun UN,
N. clevelandii, and N.bentamiana. These plants showed characteristic symptons such as lesions, concentric zones, stem necrosis, wilting and collapse at different times
after inoculation. Spherical particles of TSWV were observed with serologically specific electron microscopy (SSE_I) method. The result showed that TSWV
infection is prevalent in Varamin region
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13138_52f7a71a0f74ecf212e98619316503a0.pdf
-
علی
احمدی
author
د.آ.بیکر
author
text
article
2000
per
Changes in gas exchange and internal CO2 conecentration (Ci) of leaves of different ages under different water stress conditions and at different growth stages were investigated. As water stress progressed, net photosynth_is rate (Pn) and stomatal conductance (gs) declined, becoming significantly lower than those of control at per-wilting and showed a further reduction to per-wilting followed by a marked invreased at wilting stage and then a sharp decline upon rewatering. When rewatering delayed until severe
wilting, neither Pn nor gs recovered and Ci remained at a significantly higher
level than that of the control. Although chlorophyll content of wilting leaves
was not reduced, a significant reduction in chlorophyll content of leaves recovered from wilting was observed. Long term water stress, however caused a significant reduction in chlorophyll content. Ultrastructural studies revealed some alteration in the chloroplast of wilted leaves. It was concluded that mild
water stress reduced Pn mainly through reversible stomatal limitations, but under more severe or prolonged water stress conditions, non stomatal factors
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13139_1062868c9fa2937b2d70e2ed60dc6fe6.pdf
-
سید رضا طبائی
عقدائی
author
text
article
2000
per
-
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13140_15babc6d699534d0c033b6655a16078b.pdf
-
یحیی
امام
author
منوچهر
خردنام
author
محمدجعفری
بحرانی
author
محمدتقی
آساد
author
حسین
غدیری
author
text
article
2000
per
To study the residue management effects on grain yield and its components in a continuos winter wheat cropping system undor irrigation a five - years experiment (1993-1998) was conducted at the agricltural research station of Shiraz. University, located at Koushkak. The treatments were composed of: a) sowing after residue burning, removing, plowing or disking and b) sowing wheat in residue with chisel seeder when the straw was left erect, the land was first irrigated and then sown with or without herbicide application. The results indicated that the highest grain yield was achieved when the residues were either removed or burnt. Such greater grain yield was the result of increased grain number per unit area with no significant change in mean kernel weight. Increased grain number per unit area with no significant change in mean kernel weight. Increased grain number per unit area was due to both increased number of fertile shoots per unit area and number of grains per ear. Greater fertile shoots per unit area in burning or removing straw treatments was associated with better plant establishment and enhanced tillering. It was observed that only small amounts of the residue left could be decomposed during the period between thd harvest of previous crop and next sowing time due to low soil moisture content. Continuous residue accumlation, resulted in poor estabilishment of the crop, reduced plant denstity and lower yield, under the conditions of this experiment. It is therefore recommended to remove all the wheath straw before the seed bed prepatation under similar conditions.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13141_b7334fbf07d98a0550d57416e19410d9.pdf
-
یوسف
حجازی
author
عباس
بازرگان
author
حمید
موحدمحمدی
author
مسعود
برادران
author
text
article
2000
per
Quality in agricultural education, in general, and in the faculties of
agriculture in particular, may be attained through feedback from evaluation. this would be used for policy and planning purposes. In doing so, a faculty of agriculture should have an evaluation system to judge the extent to which activities are satisfactory. Internal evaluation is suitable model which was
applied, on a pilot basis, to the Department of Agricultural Extension and Education (DAEE) in 1997-98. The -long- term objective of the pilot internal evaluation project was to test the applicability of self-evaluation in higher agricultural education in Iran and prepare the ground for its application. The imidate objective was to motivate faculty members to examine past activities of
the DAEE and find out strenghts weaknesses, opportunities and threats to plan future development of the DAEE. In applying the internal evaluation model, five sets of factors were considered for judgment. Theses included: 1) Organizational stracture, 2) Student population, 3) Faculty members, 4) Graduates and 5) Degree programs. In process of internal evaluation, after detinning appropriates evaluations criteriae, relevant indicators related to each of the five sets of factors were identified. Them based on stated goals of
the DAEE, the present situation of the factors are judged. In doing so,
expectations of faculty members with regard to research. Teaching and services at the DAEE were surveyed and present situation of the factors were compared with them. The survey was conduceted through questionanaire and
compared with them. The survey was conduceted through questionanaire and interview in the spring 1998.Population under observation included 9 faculty, 30 student, 30 graduates and 30 employers. The results indicate that student rating of teaching-learning processes was satisfactory. Futhermore, employers were satisfied with the knowledge and abilities of graduates. .But students were not satisfied with the general situation of the DAEE. Similar rating was repored by faculty members and chairman about the DAEE based on the results of evaluation, a plan of action for improving the department was s u ges ted
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13142_04db9d0ae594b4b523da04c25442f5a0.pdf
-
حمیدرضابابایی
author
بهمن یزدی
صمدی
author
سیروس عبد
میشانی
author
text
article
2000
per
In order to investigate the genetic diversity of high molecular weight glutenin subunits and relationships between the subunits and bread making
quality of wheat, seventy eight morphotypes of bread wheat of khuzestan provience from cereal collections of Tehran Agricultural College were studied, using SDS-P AGE technique. The results showed tour variants in GLU-B1 locus including: 7*,7**,8**, subunit 8 and null (1BY=null ,1BX=null) and
two variants in GLU-D110cus including: 2**and subunit 12. It was found that GLU-D1 locus has significant and more favorable effects on bread
quality, compared to other loci, and the absence of subunit 2 considerablly
reduces the bread-making quality. The effects of subunits of GLU-B110cus on bread-making quality is not well understood. Cluster analysis was performed to group locations (cities), and the results showed no relations between genetic and geographical diversity, concerning high molecular weight glutenin subunits.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13143_02086cc1c1af02f4c6a69691c5388ee2.pdf
-
پرویز
جامعی
author
فرزادمیرزایی آقچه
قشلاق
author
علی
نیکخواه
author
text
article
2000
per
The effects of urea-treated cornsilage and barley straw tre,_ted with 5%
.,
of urea solution on fattening performance of Holstein male calve was studied
in a randomised complete block design, using 24 male calves of siX month age,
with a mean live weight of 03.5:t64.14 Kg. Six total mixed _rations, (1)
Q
concentrate 50%, alfalfa hay 35% and untreated corn1rlage 15%, (2)
concentrate 50% and alfalfa hay 50%, (3) concentJate 50%, and untreated-cornsilage 50%, (4) concentrate 50% and treated _orn silage 50% ,
'-¬
(5) concentrate 50% and treated barley straw 50%, and (6) concentrate 85% and alfalfa hay 15% were fed to the calves for a 120 day period. The rations were fed individually, live weight and feed consumtion being measured every
two weeks. Apparent digestibilty of the rations (using Cr203) and blood urea space were determined. At the end of the experiment the calves were slaughtered, their dressing percentages and carcass cuts measured. The results indicated that: average daily gain, feed intake and feed conversion in calves fed with ration 6 were higher than those in calves fed with the other rations.
The difference between digestion coefficient of ration six with that in others was significant (P
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13144_b8e137371b0572e1c9b676a21f8d23c9.pdf
-
جعفراحمدی
author
حسن زینالی
خانقاه
author
محمدعلی
رستمی
author
رجب
چوگان
author
text
article
2000
per
In order to study the variation of quantitative traits and their relationships with seed yield, an experiment was conducted in Research Field of Agricultural College in 1998, using split plot design in a randomized complete block design with three replications. Main plots were 3 irrigation regimes (non stress, middle stress and terminal stress) and subplots were 8 commercially late-maturing single cross hybrid cultivars. Analysis of variance and mean comparison between treatments showed that the hybrids for all of the traits had considerable variation, and 3 irrigation regimes showed significant differences in several traits. In general, most of the traits related to stress condition had negative response and the maximum injury due to stress was on seed yield. This effect was due to severe reduction on number of seeds
per row, ear lenght and 500 kernel-weight at the flowering and seed filling stages. The results of simple correlations, stepwise regression and path analysis indicated that the selection must be performed on the number of seeds per row and ear diameter in the three irrigated regimes
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
31
v.
4
no.
2000
https://jijas.ut.ac.ir/article_13145_a4d443ecbfeb7250d26b06ae86a79755.pdf