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HEREDITAS ›› 2011, Vol. 33 ›› Issue (12): 1374-1379.doi: 10.3724/SP.J.1005.2011.01374

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Genetic analysis and gene mapping of DDF1, a pleiotropic gene involving in both vegetable and reproductive growth in rice

Sheng-Ping1, DUAN Yuan-Lin1,2, CHEN Zhi-Wei1,2, GUAN Hua-Zhong1,2, WANG Chuan-Lei1, ZHENG Lei-Lei1, ZHOU Yuan-Chang1,2, WU Wei-Ren1,2   

  1. 1. Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agricultural & Forestry University, Fuzhou 350002, China 2. Fujian Provincial Key Laboratory of Marker-Assisted Breeding of Rice, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
  • Received:2011-06-18 Revised:2011-07-29 Online:2011-12-20 Published:2011-12-25

Abstract: There are many pleiotropic genes playing key roles in regulating both vegetative growth and reproductive development in plants. A dwarf mutant of rice with deformed flowers, named as ddf1, was identified from indica rice breeding lines. Genetic analysis indicated that ddf1 was resulted from the recessive mutation of a single gene, temporarily named as DDF1. This result suggested that DDF1 is a pleiotropic gene, which controls both vegetative growth and reproductive development in rice. To map this gene, an F2 population was developed by crossing the ddf1 heterozygote with the tropical japonica rice variety DZ60. By means of bulked segregant analysis and small population-based linkage analysis using the published RM-series rice SSR markers, DDF1 was preliminarily mapped in a region between markers RM588 and RM587 on chromosome 6 with the ge-netic distances of 3.8 cM and 2.4 cM to the two markers, respectively. By developing new SSR markers in this interval ac-cording to the published rice genome sequence, we further mapped DDF1 in a 165 kb interval. The results will fa-cilitate cloning of DDF1.

Key words: rice, pleiotropic gene, DDF1, genetic analysis, gene mapping