Large-scale screening for Aegilops tauschii tolerant genotypes to phosphorus deficiency at seedling stage

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• 作者：Lang Wang ; Kun Liu ; Shuangshuang Mao ; Zhanyi Li ; Yanli Lu ; Jirui Wang…
• 关键词：Aegilops tauschii ; Wheat ; Phosphorus deficiency ; Root system
• 刊名：Euphytica
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：204
• 期：3
• 页码：571-586
• 全文大小：958 KB
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• 作者单位：Lang Wang (1)
  Kun Liu (1)
  Shuangshuang Mao (1)
  Zhanyi Li (1)
  Yanli Lu (2)
  Jirui Wang (1)
  Yaxi Liu (1)
  Yuming Wei (1)
  Youliang Zheng (1)
  
  1. Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, China
  2. Maize Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, 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

Aegilops tauschii, as one of wheat wild relatives, possesses a wide range of resistance to biotic/abiotic factors. To better utilize and provide the genetic basis of breeding for improving phosphorus deficiency tolerance, large-scale screening for tolerant A. tauschii to phosphorus deficiency was conducted using hydroponic experiment. A total of 380 A. tauschii genotypes were used to evaluate their phosphorus deficiency tolerance using root system at seedling stage. The results indicate that compared to applied phosphorus condition, genetic variation of the tested traits among 380 A. tauschii genotypes was significant under non-applied phosphorus condition. Heritability estimates showed that root dry weight, shoot dry weight, and total dry weight is highly inheritable. Principal component (PC)?analysis showed that first four PCs explained 81.387?% of total variation. S value and phosphorus deficiency tolerance index (PDTI) showed that all A. tauschii genotypes can be divided into three groups, high (17?%), moderate (58?%) and low (25?%) tolerance groups. Compared with other cultivated wheat using S value and PDTI, the top five tolerant A. tauschii genotypes have stronger ability of phosphorus deficiency tolerance than other cultivated wheat. In conclusion, we systematically evaluated large-scale A. tauschii genotypes, and 63 tolerant lines and some root traits used as selection criteria were selected. The top five tolerant A. tauschii genotypes have relative higher tolerance than other wheat, and can be further used for wheat genetic improvement and molecular breeding for abiotic stress tolerance.