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Irregularities in meiotic behavior could be partially responsible for depression in fertlity by inbreeding. This study considered relationship between irregularity in microsporogenesis and inbreeding. Irregularity in microsporogenesis as observed in irregular meiotic stages and tetrads, increased with inbreeding. Increases in tetrad irregularity were associated. with increases in the number of univalents per pollen mother cell observed at metaphase I. Results of this study indicate that when plant breeders select for increased fertility, modification in genes contolling traits other than meotic behavior may be responsible for a large proportion of any improvements in fertility.