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Home > Archive>Volume 19, Issue 5, 2018 >846-856. DOI:10.13430/j.cnki.jpgr.20180102001
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Comprehensive Evaluation of Genetic Diversity in Six-rowed Barley Germplasm
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1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Barley Research Institution of Yangzhou University, Yangzhou University,Yangzhou Jiangsu 225009; 2Jiangsu Tianfeng Seed Industry Co.,Ltd,Huaian 223001;,1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Barley Research Institution of Yangzhou University, Yangzhou University,Yangzhou Jiangsu 225009;,3Jiangsu Provincial Agricultural Reclamation and Development Corporation,Nanjing 210008;,2Jiangsu Tianfeng Seed Industry Co.,Ltd,Huaian 223001; 4Huaian Academy of Agricultural Sciences in Jiangsu,Huaian 223001;,2Jiangsu Tianfeng Seed Industry Co.,Ltd,Huaian 223001; 4Huaian Academy of Agricultural Sciences in Jiangsu,Huaian 223001;,1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Barley Research Institution of Yangzhou University, Yangzhou University,Yangzhou Jiangsu 225009;,1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Barley Research Institution of Yangzhou University, Yangzhou University,Yangzhou Jiangsu 225009;,1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Barley Research Institution of Yangzhou University, Yangzhou University,Yangzhou Jiangsu 225009;

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    Abstract:

    Exploring the genetic diversity of six-rowed barley germplasm resources could provide information in selection of parental lines and cross combinations, finally improving the breeding efficiency in six-rowed barley. In this study, eighty-nine six-rowed barley accessions, including domestic and foreign cultivars, were employed as materials to survey eight major agronomic traits (plant height, internode length below spike, spike length, grain number per spike, spike number per plant, thousand-kernel weight, grain weight per plant and biomass per plant) under three different environmental conditions. We conducted the genetic diversity analysis, principal component analysis and cluster analysis of these eight traits. The results showed that: (1)The grain weight per plant showed broader variation, while the traits, including plant type and grain number per spike, displayed narrowed genetic variation to the others. The increases on spike length and grain weight in six-rowed varieties were observed. (2) The thousand grain weight and the genetic diversity index were significantly higher in hulled vs. hulless barley. (3) The tested accessions were divided into five categories. The fifth category was the landraces of China, which was widely distributed but displayed a relatively close genetic distance among them. The other four categories were cultivars post breeding, and each had their own characteristics. (4) Based on the analysis of principal component and the scatter plot, four excellent types of germplasm were obtained, which behaved large grain and high production, and at the same time they contained four types (dwarf, long spike and strong tillering ability, big grain, and high biomass) respectively. Thus, this work provided an evaluation equation valuable in use of six-rowed barley germplasm in barley breeding.

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History
  • Received:January 02,2018
  • Revised:May 26,2018
  • Adopted:March 14,2018
  • Online: September 14,2018
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