摘要
采用地理纬度相近的中国辽宁省和美国俄亥俄州新育成亚有限型品种各4个和4个辽宁省20年代老品种为亲本,按照不完全双列杂交模式组配成辽宁当代品种×俄亥俄当代品种(Lnew×Onew)、辽宁当代品种×辽宁20年代老品种(Lnew×Lold)、俄亥俄当代品种×辽宁20年代老品种(Onew×Lold)3种类型共45个杂交组合,对其F2代主要性状的遗传参数进行了分析,为远缘杂交大豆后代选择和品种选育提供一定的理论基础。结果表明:(1)不同来源杂交组合的主要性状都具有较高的遗传变异系数,其变化规律趋于一致,分枝数的遗传变异系数最大,单株产量、单株荚数、单株粒数的GCV也较大;(2)不同组合的百粒重、株高的遗传力较高;(3)分枝数的相对遗传进度最大,而单株粒数、单株荚数、单株产量、粒茎比的相对遗传进度居中。3类杂交组合后代遗传变异丰富,性状选择的潜力较大,尤其是时代远缘杂交,今后在进行特定性状改良时,可加强这类杂交组合的研究。
In the last decades,introduced soybean germplasm was used in soybean breeding,in order to broaden the genetic bases of Chinese soybean cultivars. The objective of this paper is to provide theoretical basis for the selection and breeding of distant hybrid soybean progenies. 45 cross combinations of soybean,whose parents were from 4 current varieties released in Liaoning, China and 4 released in Ohio, USA, and 4 old varieties released in Liaoning in about 1920s＇ respectively, were arranged in incomplete diallel crosses. The agronomic parameters in F2 generation were analyzed. The results showed that the main characters of different combinations had higher genetic variation coefficients（GCV） and had a similar trend. The number of branch had the highest GCV. And the GCV of yield per plant, pod number per plant and seed number per plant also had high GCV. The 100- seed weight and plant height of different combinations had high heritability. The relative genetic schedule （RGS） of the number of branch was the biggest one,while seeds number per plant, pods number per plant, yield per plant and seedstem rate had medium RGS. There were abundant genetic variations and great selection potential in the hybrid soybean progenies, especially the crosses with parents released in different decades.
出处
《大豆科学》
CAS
CSCD
北大核心
2008年第4期576-580,共5页
Soybean Science
基金
辽宁省科技厅资助项目(2006201008)
辽宁省教育厅创新团队资助项目(2006T116)
关键词
大豆
远缘杂交
变异系数
遗传力
遗传进展
Soybean
Distant hybridization
Genetic variation coefficients
Heritability
Genetic gain
