摘要
本文利用来自一个籼/粳交（圭630/02428）的双单倍体（DH）系和由多种类型的籼、粳品种（系）组成的对照组,从分子水平上研究亚洲栽培稻的基因型差异。结果表明,栽培稻中存在两种主要的差异类型,即质的差异和量的差异。前者主要存在于籼、粳分化程度比较高的对照组中,85％以上的有关位点已经发生了籼或粳的分化趋向;后者主要存在于DH群体中,平均只有51.5％的位点发生了倾籼的趋向,或48.5％的位点发生了倾粳的趋向。利用41个籼粳分化标记位点,结合形态指数分类和PFLP遗传标记的数值分类结果,提出了栽培稻的基因型差异程度与分类的关系。
The extent of genotypic divergence of the Asian cultivated rice was investigated at the molecular level, using two sets of rice materials, i. e. , a set of doubled haploid lines, and another set of Indica or Japonica cultivars (lines) representing a broad spectrum of the Asian cultivated rice gene pool including landraces, primitive cultivators, historically important cultivators, modern elite cultivators, new plant type rice and parents of superior hybrids. Results showed that two major types of genotypic divergence were exhibited, that is, qualitative and quantitative divergence. The former was mainly existed in the second set of apparently classified Indica and Japonica lines in which more than 85% of diagnostic marker loci (DMLs) have well differentiated into Indica or Japonica, while the latter was mainly exhibited in DH lines in which only 51.5% of DMLs are differentiating toward Indica or 48. 5% are differentiating toward Japonica. A relation was preliminarily established between the extent of genotypic divergence and classification, based on the data of 41 diagnostic marker loci and morphological traits.
出处
《作物学报》
CAS
CSCD
北大核心
1999年第4期518-526,共9页
Acta Agronomica Sinica
基金
国家自然科学基金资助项目
关键词
基因型差异
栽培稻
分类
水稻
Oryza sativa L.
Genotypic divergence
Classification
