Female reproductive organs of Brassica napus are more sensitive than male to transient heat stress

Abstract Oilseed rape ( Brassica napus L.) is sensitive to heat stress during the reproductive stage, but it not clear whether male and female organs differ in their sensitivity stress. In this study, full diallel crossing experiments were conducted among four genotypes of B. under control, moderate high conditions for five days immediately before two after crossing. General combining ability (GCA), specific (SCA) reciprocal effects analyzed evaluate genetic basis tolerance organs. High temperature (Tf) (Tm) reduced number fertile pods seeds set per floret, significant Tf × Tm interaction indicated that more than There no overall GCA, SCA or across all combinations Tm. However, a effect was found, suggesting differed as increased. The relative G1 increased increased, G2 decreased summary, has demonstrated are transient at early flowering increases.