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用单株穗数、主穗粒数、生长率、收获指数、生物学产量与籽粒产量的回归关系,分析了水稻的5个经济性状共26种组合。结果表明,只要有收获指数、生物学产量单独参与或共同参与组合的,回归就显著;没有这两个性状参与的就不显著,并且以生物学产量的 Up 最大。通径分析表明,生物学产量对籽粒产量的贡献最大,收获指数次之,生长率对籽粒产量影响最小。各种排列组合中,R=0.99的有8种,(R~2=0.98),这8种组合,控制了籽粒产量变异的98.0%,说明它们是影响产量的主要因素。
A total of 26 combinations of five economic traits were analyzed with the regression relationship between the number of panicle per plant, the number of main spike, the growth rate, the harvest index, the biological yield and the grain yield. The results showed that the regression was significant as long as the harvest index and biological yield were individually or jointly involved in the combination; those without the two traits involved were not significant, and the biological yield was the largest. Path analysis showed that biological yield had the largest contribution to grain yield, followed by harvest index, and growth rate had the least effect on grain yield. Among the various permutations and combinations, there were 8 species with R = 0.99 (R ~ 2 = 0.98). These 8 species combinations controlled 98.0% of the variation in grain yield, indicating that they are the main factors affecting the yield.