摘要
应用新近提出的p^+q^+pq交配设计的种子性状遗传表达鉴别方法,分析了籼型水稻3个不育系和10个恢复系配组的30个杂种F1植株上的F2种子及其亲本的9个稻米品质性状。结果表明:(1)粒长、粒宽、粒重、糙米率和完整精米率5个性状在F2米粒间没有发生遗传分离,它们的遗传受二倍体母体基因型(F1植株)控制。(2)垩白率、直链淀粉含量、糊化温度和胶稠度4个性状则在F2米粒间有极显著的遗传分离。
Nine quality characters of 3 sterile lines, 10 restorers and their 30 indica hybrid rice by NC Ⅱ genetic design were studied. The results showed as follows: (1) No genetic segregation occurred in F2 grains in grain length, grain width, grain weight, brown rice% and head rice%, which indicated these traits are completely controlled by maternal plant genotypes. (2) Significant genetic segregation occurred in F2 grains in chalkiness score, amylose content ,gelatinization temperature and gel consistency, which indicated the genetic expression of these traits is mainly controlled by endosperm genotypes. (3) The quality characters have relatively high heritabilities except brown rice % and chalkiness score. The genetic variation of quality characters was mainly caused by additive effect except grain weight.
基金
国家自然科学基金!(编号39370436)