河南夏大豆产量相关性状的遗传分析

以10个河南夏大豆主栽品种为材料，对与株粒重有关的10个农艺性状进行了遗传相关、遗传参数和通径分析。试验结果表明：株高、每节粒重、株有效荚数、粒茎比和株粒重呈高度正相关，与环境相关较小；株高与粒茎比的遗传力较大，每荚粒数与每节粒重的遗传力较小；各性状对株粒重的重要贡献的大小依次为每节粒重、株有效荚数与粒茎比。因此，大力提高节粒重、株有效荚数与粒茎比是河南夏大豆高产育种的方向。

GENETIC ANALYSIS OF CHARACTERS RELATED TO THE YIELD OF SUMMER SOYBEAN IN HENAN

Genetic parameters, genetic relavance and path analysis of 6 quantitat ive charac ters. related to the seed weight per plant of Summers Soybean in Hanan. Were studied with 10 breeds of it. The experimental results showed that plant height. seed weight per node. effective pods per plant and the ratio of seed weitht ot stem weight per plant had a highly positive relavance and a little relation to environmental effet; heritabilities of plant height and the ratio of seed wignt to stem one were bigger than that of seed No.per pod and seed weight per node: the characters, making the more contribution to seed weight per plant. in turen were seed weight per node, effective pods per plant and the ratio of seed weight to stem one from large to little. It was concludeed that the main direction of breeding high yield soybean in henan should be the enhancement of seed weight per node. effective pods' No. per plant and the ratio of seed weight to stem one under the rational close planting condition