河北省野生大豆种群若干数量性状结构特征

 分析了我国河北省野生大豆天然种群几个重要数量性状的群体结构特征及其地理生态分布。结果显示：平均种群内变异系数大小顺序依次为：百粒重(46％)>脂肪含量(17％)>开花期(10.3％)>蛋白质含量(4.7％)。种群平均开花期与纬度有相关性，而百粒重、脂肪和蛋白质含量分布与纬度没有相关，与种群的生态和遗传背景有关。种群内每个数量性状分布都存在一个优势区段。种群内数量性状存在因基因频率积累程度的不同而导致表型差异较大的遗传型个体。虽然同一个居群长期受到相同光周期诱导，但是种群不是有单一相近的开花期，存在着开花光周期反应不同的基因型。地理种群结构相似性分析表明：河北省天然野生大豆种群结构相似性与地理生态有密切相关性，存在地理生态群。

QUANTITATIVE CHARACTER STRUCTURES OF THE NATURAL POPULATIONS OF WILD SOYBEAN IN HEBEI PROVINCE

Wild soybean is the progenitor of soybean, sharing the gene pool of soybean. In this paper structure and geographical distributions of the natural populations of wild soybean in Hebei Province were analyzed using some important quantitative traits. Coefficients of variation within populations were greatest for 100 seed weight (46%) followed by fat content (17%), flowering time (10.3%) and protein content (4.7%). Within population mean flowering times were related to latitudes, but 100 seed weight, fat and protein contents were not. Every population had some individual plants with outstanding differences in character performances that had virtually been caused by the accumulation of gene frequencies for quantitative characters. It was observed that there were different genotypes for genetic flexibility in flowering photoperiodic response, although the populations had always been subjected to the same photoperiodic induction. A similarity analysis of the natural populations indicated a relationship between the quantitative structures of populations and their geographic and ecological distribution areas-showing distinct ecological groups in wild soybean.