【摘要】 小麦大穗型新品种的数量性状分析表明,株粒数和结实小穗数两性状对株粒重直接影响较大;株高、株穗数和主穗粒数3性状对株粒重直接影响很小,而通过其它性状的间接影响很大;百粒重对株粒重直接或间接都有一定影响;不实小穗数对株粒重直接影响很小,间接负影响较大。本文对7个显著性状建立的最优回归方程为y=-56.534-0.008X₁-0.155X₂+0.243X₅+0.673X₆-0.999X₇+0.540X₈+0.987X₉更多还原

【Abstract】 The Multi-quantity Characteristic analysis of a new species of wheat breads of large spike-type shows that grain number per plant, and Effective spike number per plant, these two characteristics have a considerable direct effect on grain weight per plant;plant height, nonbearing spikelet number and grain number of a main spike, these three characteristics have little direct effect but a larger direct negative effect, and passing over other characteristics the indirect effect is faily large; Weight of 100 kernels has a certain direct or indirect negative effect on the grain weight per plant; Direct effect or indirect negative effects of nonbearing tillering number on grain weight per plant are considerably small; Nonbearing spikelet number has a larger indirect negative effect than direct effecl on the grain weight per plain, The optimum regression equation upon the seven charracteristics isY= -6.023-0.002x1-0.040x2+0.078x5 + 0.175x8 -0.309x7更多还原