Study on Inheritance and Association of Some Quality Traits in Hybrid Rice
Tan Zhenbo, Kuang Haochi, Yin Guoda et al (Rice Research Institute, Sichuan Academy of Agricultural Sciences).
Inheritance and association were worked out for 7 quality traits of hybrid rice. Percentage of chalky grain and chalkyness area of hybrid rice were more than those of high quality standard. h_B~2% of 7 traits was 30.70～95.75%,with grain shapegrain lengthhead rice yieldchalky grainbrown rice yieldchalkyness areatotal milling yield. A—line's gca affected 7 quality traits whereas R—Iine's gca or sca only affected some of them significantly. The ratio or of 7 traits was 75.19～97.14%,it suggested all the traits were affected by additive gene action. There existed significant line association between gi(P_1) +gj(P_2) and means of 7 traits, with which 7 traits of hybrid rice will be predicated. The results of path analysis suggested 1000—grain weight had the largest positive direct-influence whereas the ratio of grain length to width, head rice yield had negatively large direct influence on grain chalkyness area.