%D %0 ARTICLE %T [ Genetic effects on grain shape traits of indica black pericarp rice and their genetic correlations with main mineral element contents in grains ] %J Yi Chuan Xue Bao %V 29 ( 8 ) %P 688-95 %A Zhang MW %A Guo BJ %A Peng ZM %M pub12200859 %X Complete diallel crosses with 7 varieties of indica black pericarp rice were conducted to analyze the genetic effects on grain shape traits such as 100-grain weight , grain length , grain width and length/width and their genetic correlations with main mineral elements of Fe , Zn , Mn and P contents in kernels of parents and their F1s and F2s , by using the full genetic model including seed , cytoplasmic and maternal effects on quantitative traits of seeds in cereal crops . The results indicated that the grain shape traits were controlled by seed direct genetic effects , maternal genetic effects as well as by cytoplasmic effects . The seed direct genetic effects were more important than the maternal genetic effects for grain shape traits , and seed direct additive effects constituted a major part of their genetic effects . The narrow heritabilities of seed direct effects were high for 100-grain weight , grain width and grain length/grain width , while those of seed and maternal effects were intermediate for grain length . Therefore , more attention should be paid to the single seed selection on the 100-grain weight , grain width and grain length/grain width in early generations of hybrid offspring , while in the case of grain length , attention should be paid to single plant selection and single seed selection in late generations . The results also showed that there existed significant genetic correlations of seed direct additive , seed direct dominance , cytoplasm , maternal additive and maternal dominance between most of grain shape traits such as 100-grain weight , grain length , grain width , grain length/grain width and main mineral elements of Fe , Zn , Mn and P contents in grains . The improvement for nutrient quality traits of main mineral elements Fe , Zn , Mn and P contents in indica black pericarp rice could be realized by the indirect selection of grain shape traits in speciality rice quality breeding .