RICE SCIENCE ›› 2009, Vol. 16 ›› Issue (2): 106-110 .DOI: 10.1016/S1672-6308(08)60065-7

• Research Paper • Previous Articles     Next Articles

A Cleaved Amplified Polymorphic Sequence Marker to Detect Variation in Wx Locus Conditioning Translucent Endosperm in Rice

CHEN Tao, ZHANG Ya-dong, ZHAO Ling, ZHU Zhen, LIN Jing, ZHANG Suo-bing, WANG Cai-lin   

  1. Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice R & D Center, Nanjing 210014, China
  • Received:2008-04-22 Online:2009-06-28 Published:2009-06-28
  • Contact: WANG Cai-lin
  • Supported by:
    the National High Technology Research and Development Program of China (Grant No. 2006AA100101), National Science and Technology Support Program of China (Grant No. 2006BAD01A01-5), Special Program for Rice Scientific Research, Ministry of Agriculture, China (Grant No. nyhyzx 07-001-006), Super Rice Breeding and Demonstration Program, Ministry of Agriculture, China and Jiangsu Agricultural Scientific Self-innovation Fund, China (Grant No. CX [07] 603).

Abstract: The translucent endosperm trait in a japonica rice variety ‘Kantou 194’ is controlled by a Wx-mq gene which is allelic to Wx locus by genetic analysis and allelic test. The amylose content analysis showed that an intermediate amylose content between those of glutinous and non-glutinous rice existed in endosperm of homozygous Wx-mq genotype. The slight changes of amylose content in different varieties and F1 grains with an identical Wx-mq genotype might be influenced by dissimilar genetic background. To identify the Wx-mq genotype simply and rapidly, a cleaved amplified polymorphic sequence (CAPS) marker was designed. The result from the molecular detection indicated that it could be used for marker-assisted selection for low amylose content varieties in rice breeding.

Key words: rice, amylose content, translucent endosperm mutant, waxy gene, molecular marker-assisted selection, cleaved amplified polymorphic sequence marker