Mapping QTLs related to rice seed storability under natural and artificial aging storage conditions

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• 作者：Ngo Thi Hang ; Qiuyun Lin ; Linglong Liu ; Xi Liu ; Shijia Liu ; Wenyan Wang…
• 关键词：Rice ; Seed storability ; Natural aging ; Artificial aging ; Backcross inbred lines ; Chromosome segment substitution line ; Quantitative trait locus
• 刊名：Euphytica
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：203
• 期：3
• 页码：673-681
• 全文大小：796 KB
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• 作者单位：Ngo Thi Hang (1)
  Qiuyun Lin (1)
  Linglong Liu (1)
  Xi Liu (1)
  Shijia Liu (1)
  Wenyan Wang (1)
  Linfang Li (1)
  Niqing He (1)
  Zhou Liu (1)
  Ling Jiang (1)
  Jianmin Wan (1) (2)
  
  1. State Key Laboratory of Crop Genetics and Germplasm Enhancement, Research Center of Jiangsu Plant Gene Engineering, Nanjing Agricultural University, Nanjing, 210095, China
  2. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Physiology
  Plant Sciences
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5060

文摘

Seed aging or deterioration in rice (Oryza sativa L.) is a major problem for agronomic production and germplasm preservation. Deciphering the genetic mechanism involved in seed aging and improving seed storability is therefore a vital goal for rice breeding. A set of 85 backcross inbred lines derived from the backcross ‘Sasanishiki-(japonica cv.)/‘Habataki-(an indica cv. with strong seed storability)//‘Sasanishiki-was used here to detect quantitative trait locus (QTL) controlling seed storability. Seeds were treated under natural (conventional storage for 48?months) and artificial aging storage conditions (i.e. increased temperature and relative humidity) and germination rate was used to evaluate seed storability. A total of thirteen QTLs for seed storability were identified on chromosomes 1, 2, 3, 4, 5, 7, 11 and 12, respectively. Among them, two QTLs, viz. qSSh-2-1 and qSSh-2-2, were repeatedly detected in both treatment conditions. In contrast, four (qSSh-4, qSSs-5-1, qSSs-5-2 and qSSh-12) and seven QTLs (qSSh-1, qSSh-3-1, qSSh-3-2, qSSh-3-3, qSSh-7-1, qSSh-7-2 and qSSh-11) were detected only once in natural and artificial aging treatments, respectively. The ‘Habataki-derived alleles were observed to increase seed storability at all the loci except qSSs-5-1 and qSSs-5-2. The existence of QTLs qSSh-1, qSSh-3-1, qSSh-3-2, qSSh-3-3, qSSh-4, qSSh-7-1, qSSh-7-2 and qSSh-11 was confirmed using Habataki chromosome segment substitution lines in a Sasanishiki genetic background. These results provide an opportunity for map-based cloning of major QTLs for seed storability, thereby gaining an understanding of seed storability in rice and possibilities for its improvement.