摘要
对吉林省1923年以来育成的20个主要栽培大豆品种不同生育期根瘤数量、根瘤鲜重和根瘤体积的变化进行了比较研究。结果表明,大豆根瘤数量、根瘤鲜重和根瘤体积在四叶期(V4)根瘤形成很少,品种间也无差异,盛花期(R2)最大,结荚期(R4)略有下降,鼓粒期(R6)期最低。R2期、R4期大豆根瘤数量、根瘤鲜重和根瘤体积与育成年代和产量呈正相关,其中R2期与育成年代和产量关系最为密切,R6期呈负相关,但不显著。现代品种根瘤数量、根瘤鲜重和根瘤体积在R6期均呈下降变化,而老品种根瘤数量、根瘤鲜重和根瘤体积在R6期则表现增加的变化趋势。
In order to evaluate the changes of nitrogen fixation characteristics in soybean cultivars during the genetic improvement, a comparative study was made in nodule number, fresh weight and volume with 20 soybean eultivars released from 1923 to 2005. The results showed nodule number, fresh weight and volume were low at fourth leaf stage （V4） , then increased at R2 （flowering） and R4 （pod growth） stages. At R6 （seed filling）, nodule number, fresh weight and volume were much lower in modern cultivars compare to traditional ones. Nodule number, fresh weight and volume showed significant positive correlation with yield at R2 stage. Our results indicated that genetic improvement of soybean cultivars increased nodule number, fresh weight and volume along with the year of release. Nodule number ,fresh weight and volume at RE stage had greater influence in yield selection indexes in soybean breeding.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2009年第2期196-201,共6页
Chinese Journal of Oil Crop Sciences
基金
国家自然科学基金项目(30871547)
关键词
大豆
遗传改良
根瘤
产量
Soybean
Genetic improvement
Nodule
Yield
