花香A系列杂交水稻组合产量及米质性状相关及通径分析

对10个花香A杂交组合参加水稻区域试验的产量和品质数据进行相关分析和通径分析。结果表明,产量性状中日产量与有效穗数、株高与穗长、总粒数与实粒数均成极显著正相关,日产量对产量的贡献最大(0.7205),其次为有效穗数;米质性状中整精米率与垩白粒率、长宽比与垩白粒率、垩白度呈显著负相关。提出了以花香A为亲本在配制杂交组合时,应主要通过提高其日产量、有效穗数,并适当延长其生育期、降低其株高与穗长来提升产量;同时,适度降低籽粒长宽比,从而提高灌浆效率,降低垩白粒率、垩白度,进而提高整精米率,提升稻米品质。

Correlation and Path Analysis of Yield and Quality Traits of Rice Combinations from Huaxiang A

By analyzing the data collected from 10 hybrid rice from Huaxiang A for rice regional test with the coefficient of the correc-tion and path analysis, the results indicated that there exist significant positive correlation between daily production and effective pan-icle number, plant height and panicle length, grain number per panicle and filled grain number of per panicle, respectively. And the contribution of daily production to grain yield is the largest, next for effective panicle number. The head rice rate and chalky rice rate, length/width ratio and chalky rice rate, length/width ratio and chalkiness degree are significant negative correlation. Accordingly, we can increase the yield of hybrid rice from Huaxiang A by improving the daily production and the number of effective panicle, extend-ing the growth period, reducing the plant height and panicle length properly. And in order to improve the grain quality, we should re-duce the length/width ratio moderately, so as to improve the grain filling efficiency, reduce the chalky rice rate and chalkiness degree, and improve the head rice rate.