Abstract:

To further explore the yield potential of the high-quality and high-yield indica glutinous rice variety ‘Zhenzhunuo’ and improve planting efficiency, the rice comparison test data of Xinyang City Academy of Agricultural Sciences in recent years were used in this study. The correlation analysis, regression analysis and path analysis were carried out to analyze the whole growth period (x₁), plant height (x₂), effective panicle (x₃), ear length (x₄), grain number per ear (x₅), seed setting rate (x₆), thousand-grain weight (x₇) and yield (y). The results showed that the variation coefficient of agronomic traits of ‘Zhenzhunuo’ was expressed as follows: grain number per ear>effective panicle>ear length>seed setting rate>yield>thousand-grain weight>plant height>whole growth period, and the coefficient ranged from 5.27% to 19.74%. The correlation analysis, path analysis and regression analysis results showed that the agronomic traits of effective panicle, grain number per ear and seed setting rate had the greatest effect on the yield of ‘Zhenzhunuo’, and their correlation coefficient, partial correlation coefficient and direct path coefficient with yield reached extremely significant (P<0.01) or significant (P<0.05) level. The comprehensive decisive effect on yield was as follows: grain number per ear>seed setting rate>effective panicle. Through stepwise regression analysis, the agronomic traits of effective panicle, grain number per ear and seed setting rate significantly affecting the yield of ‘Zhenzhunuo’ were screened out to establish the optimal regression equation: y=1729.381+8.859x₃+7.743x₅+37.755x₆. Therefore we must take measures to increase the effective panicle, grain number per ear and seed setting rate, which are the main agronomic traits affecting the yield of ‘Zhenzhunuo’, to promote the variety’s application and achieve high yield.

Key words: conventional glutinous Rice, ‘Zhenzhunuo’, yield, correlation analysis, path analysis, regression analysis