Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Genetic differentiation of nuclear DNA in common wild rice (Oryza rufipogon Griff.) and cultivated rice (O. sativa L.).

Abstract

Genetic differentiation of 39 accessions of common wild rice (O. rufipogon) from China and 33 varieties of cultivated rice (O. sativa) was studied on the basis of RFLP analysis of nuclear DNA. It is suggested that common wild rice from China can be classified into three types: primitive types, indica-like types and japonica-like types. The genetic diversity found among Chinese wild rice accessions was related to their geographical distributions. All of the accessions from Dongxiang, Jiangxi Province, Chaling, and Hunan Province, and some accessions from Yuanjiang and Yunnan Province, are classified as primitive types because they are not clustered into indica- or japonica-type groups and their morphological characteristics are primitive. The wild rice accessions from Guangdong and Guangxi are japonica-like or indica-like types.