Self-Compatibility Studies with Astragalus Cicer L
1971
Townsend, C. E.
Astragalus cicer L. is a predominantly self-incompatible species, since 43% of a 424-plant population did not set a single seed, and only 2% set in excess of 50 seeds per raceme following self-pollination under field conditions. Air temperatures of 27 C day-16 C and 21 C night, 27 C day-21 C night, and 32 C day-21 C night had no consistent effect on the self-compatibility reaction of 16 clones. However, there was evidence of clone by temperature interaction. The average number of ovules per ovary was 11.5. The percentage of aborted pollen grains was generally very low. Three methods of measuring self-compatibility (percentage of florets setting seed, average seed set per floret, and average seed set per raceme) were highly correlated.
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