籼型杂交晚稻稻米品质性状的遗传效应分析

以6个籼型野败三系不育系为母本,5个晚籼恢复系为父本,进行不完全双列杂交设计,对籼型杂交晚稻稻米品质性状的遗传效应进行分析.结果表明:糙米率、精米率、垩白粒率、碱消值和胶稠度等5个性状同时受到种子遗传效应和细胞质遗传效应的控制,但细胞质遗传效应都大于种子遗传效应.整精米率、垩白度和透明度等3个性状只受到种子遗传效应的控制,并且都以种子显性遗传效应为主.直链淀粉含量同时受到种子遗传效应和母体植株遗传效应的控制,但以种子显性遗传效应为主.粒长和长宽比同时受到母体植株加性遗传效应和母体植株显性遗传效应的控制.不育系451A、全丰A、长丰A及恢复系蜀恢527、科恢752、岳恢94是配制优质杂交晚稻组合的优异亲本.

Analysis of genetic effects for grain quality characters in late indica hybrid rice

Six CMS(Fuyi A etc.) and 5 late-restorers(Minghui 63 etc.) were used in partial diallel crosses to analyse the genetic effects of grain quality characters in late indica hybrid rice,using seed quantitative traits genetic models and analysis methods developed by Zhu Jun in cereal crops.The results showed that the 5 characters were simultaneously controlled by seed genetic effects and cytoplasmic genetic effects in percentage of brown rice,percentage of milled rice,percentage of chalky grain,gelatinization temperature and gel consistency,but the cytoplasmic genetic effects were all higher than the seed genetic effects.The 3 traits were only controlled by seed genetic effects in percentage of head rice,chalkiness and translucency,and the effects were all mainly come from seed dominance genetic effects.Amylose content was controlled by seed genetic effects and maternal genetic effects,but was mainly controlled by seed dominance genetic effects.The 2 traits were simultaneously controlled by maternal additive genetic effects and maternal dominance genetic effects in kernel length and length/breadth ratio.The 6 materials were available parents for breeding late indica hybrid rice combinations with good quality,which included the CMS of 451 A,Quanfeng A and Changfeng A,the restorers of Shuhui 527,Kehui 752 and Yuehui 94.