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

HUANG Li-xing~(1,2),LI Qing-hua~2,LIN Ling-na~2,ZHANG Yi-hua~2,LEI Shang-ping~2,WANG Hou-cong~3,YOU Nian-shun~2,LIANG Kang-jing~1(1.College of Crop Science,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;2.Rice Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou,Fujian 350018,China;3.School of Life Science,Xiamen University,Xiamen,Fujian 361005,China)  
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.
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