SSR markers were used to analyze the genetic structure and compare indica or japonica component of Chinese major inbred rice varieties from the 1950s to the 1990s. The results showed that the genetic structure of major inbred rice varieties in China was distinctly divided into two populations, indica and japonica rice. The substructure of indica rice was more complex than that of japonica rice. Lateseason indica rice and earlyseason japonica rice had a little simplex genetic background. The seasonal ecotypes were not quite in conformity with the subtypes of genetic structure. A total of 12 SSR loci with specific differentiation between indica and japonica rice were used to calculate the indica or japonica component. The difference of indica or japonica component among the five decades was not significant except lateseason indica rice. The japonica component of lateseason indica rice planted in the 1990s was increased obviously. These results will be helpful to understand the genetic structure of Chinese major inbred rice varieties and indicajaponica hybridization breeding in China.
YU Ping, YUAN Xiao-Ping, XU Qun, WANG Cai-Hong, YU Han-Yong, WANG Yi-Ping, WEI Xing-Hua*
. Genetic Structure and Indica/Japonica Component of Major Inbred Rice Varieties in China[J]. Chinese Journal OF Rice Science, 2011
, 25(4)
: 387
-391
.
DOI: 10.3969/j.issn.1001-7216.2011.04.007
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