【摘要】 通过奇选42、广二矮104等7个水稻品种,分别配制不同的杂交组合,研究了水稻主要经济性状的遗传力,F₁与两亲本的相关,杂种各世代之间的相关,F代的主要经济性状之间的相关,F₄代构成产量的经济性状与单株谷粒产量的复相关和多元回归分析。结果表明,水稻的株高、千粒重、结实率、单株谷粒重和穗粒数的遗传力较高,这些经济性状在 F₁与两亲本的相关中,在杂种各世代之间的相关中,都表现出中度或高度的显著或极显著的正相关。每株穗数和每穗实粒数与单株谷粒产量,每株穗数和每穗粒数与单株谷粒产量,每株穗数和结实率与单株谷粒产量,在复相关和多元回归中,都表现为显著或极显著的水平。更多还原

【Abstract】 Different crossing combinations of F rice varieties were applied to study the heritabilities of main economic characters,the correla- tions between F₁ and biparents,the correlations among hybrid generations, the correlations among main economic characters in F₄ population,and the multiple correlations and regressions between economic characters which affect grain yield and grain yield per plant in F₄ population.The results showed that the heritabilities of plant height,1000-grain weight,seed setting rate,grain weight per plant and grain number per panicle were high. Significant or highly significant positive correlations were found between F₁ and biparents,among hybrid generations for these characters.Multiple correlations and regressions were significant or highly significant between panicle number per plant and plump grain number per panicle or grain yield per plant,between panicle number per plant and grain number per panicle or grain yield per plant,and between panicle number per plant and seed setting rate or grain yield per plant.更多还原