小麦芒长近等基因系的芒发育动态与超微结构研究

In this study, near-isogenic lines of bread wheat with different awn length, SN051-1 and SN051-2 which had allele conferring the awn-inhibitor gene B1, were investigated on characteristics, developmental dynamic, thousand kernel weight. The results showed that the two lines have obvious difference in awn leagth with the similar growth period and plant performence. Green cells in awn are rich in chloroplast and mitochondria. Furthermore chloroplast in SN051-1 is bigger than that in SN051-2. The further results demonstrated that the thousand kernel weight of awned plant is higher than that of awnless plant in parents, F2 population and BC1 population, which illustrated that awns take an important role in grain filling and thousand kernel weight.