摘要
亚洲栽培稻的祖先是普通野生稻,已成为世界公认的观点,然而亚洲栽培稻的2个亚种:粳稻和籼稻是一次起源还是二次起源仍存在很大争议,其起源地是国内还是国外依然是国际学者间争论的焦点。本文通过对184份亚洲栽培稻和203份普通野生稻3段基因序列cox3、cox1、orf 224和2段基因间序列ssv-39/178、rps2-trnfM的多样性研究,验证了以下观点:1)粳稻起源于中国,籼稻起源于中国和国外;2)亚洲栽培稻的起源为二次起源,即普通野生稻存在偏籼和偏粳2种类型,亚洲栽培稻的2个亚种籼稻和粳稻在进化过程中分别由偏籼型的普通野生稻和偏粳型的普通野生稻进化而来。
Wild rice （ Oryza rufipogon） has been recognized as the ancestor of Asian cultivated rice （ Oryza sati- va）. However, where and how cultivated rice originated from wild rice has been debated for a long time in the world. Moreover,whether the two subspecies of Asian cultivated rice,indica and japonica, were domesticated with the ways of single origin or multiple origins was still considerably controversial, and whether they originated from China or aboard was still the focus of debate among international scholars. In this study, 184 accessions of Asian cul- tivated rice and 203 accessions of Oryza rufipogon to be sequenced with 3 gene fragments（ cox3 ,coxl ,orf 224）and two inter gene regions（ ssv-39/178 ,rps2-trnfM）in mitochondrial genome of rice were collected. Through the study of gene diversity of the five fragments,the following propositions were verified. First,the origin of japonica was in China, and the origin of indica was not only in China but also in foreign countries. Second,the subspecies of Asian cultivated rice were domesticated with two origins. In other words, common wild rice contained the indica-like and japonica-like types, and the two subspecies were evolved from the indica-like wild rice and the japonica-like wild rice respectively.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2013年第1期18-24,共7页
Journal of Plant Genetic Resources
基金
农业野生植物资源保护利用技术研究与示范(201003021)
转基因水稻环境安全评价技术(20082x08011-001)
关键词
线粒体基因组
基因多样性
起源
籼粳分化
mitochondrial genome
gene diversity
origin
Indica-japonica differentiation
