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HEREDITAS ›› 2011, Vol. 33 ›› Issue (12): 1393-1397.doi: 10.3724/SP.J.1005.2011.01393

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Gene mapping of an ultra-dwarf mutant in upland cotton

JING Chao1, MA Xiao-Jie2, DI Jia-Chun2, CHEN Xu-Sheng2   

  1. 1. Agronomy College of Nanjing Agricultural University, Nanjing 210095, China 2. Key Laboratory of Cotton and Rape in the Lower Reaches of the Yangtze River, Ministry of Agriculture, Jiangsu Academy of Agri-cultural Sciences, Nanjing 210014, China
  • Received:2011-04-03 Revised:2011-10-21 Online:2011-12-20 Published:2011-12-25

Abstract: A ultra-dwarf mutant was newly found in upland cotton (Gossypium hirsutum L.). This mutant was controlled by single recessive gene du. Seventy pairs of polymorphic primers were selected from 1350 primers, which covered all the identified chromosomes by screening in parents and near-isogenic lines. Gene du was mapped using an F2 population derived from intraspecific crosses between “Ultra-dwarf 1” and “Xinluzao 16”. Thirty-six primers were distributed in eight linkage groups, and du was linked to LG01. Seven co-dominant markers linked to du were NAU2679, NAU2749, NAU905, NAU2838, NAU5373, NAU2238, and NAU4946. Based on the known genetic map of tetraploid cotton, the markers NAU4946, NAU2238, NAU905, NAU5373, and NAU2679 were located on chromosome 6, and the target gene du was located between NAU2238 and NAU4946 with the genetic distances of 3.3 cM and 1.4 cM, respectively. Hence, gene du was located on chromosome 6.

Key words: upland cotton (G. hirsutum L.), ultra-dwarf mutant, gene location, SSR