Population structure, genetic variation and linkage disequilibrium in perennial ryegrass populations divergently selected for freezing tolerance
作者: Mallikarjuna Rao eKoviSiri eFjellheimSimen R SandveSimen R SandveArild eLarsenHeidi eRudiTorben eAspMatthew Peter KentOdd Arne eRognli
作者单位: 1Norwegian University of Life Sciences
2Graminor AS
3Arhus University
刊名: Frontiers in Plant Science, 2015, Vol.6
来源数据库: Directory of Open Access Journals
DOI: 10.3389/fpls.2015.00929
关键词: Linkage DisequilibriumLolium perenneGenetic diversityPopulation structureFreezing toleranceOutlier SNPs
原始语种摘要: Low temperature is one of the abiotic stresses seriously affecting the growth of perennial ryegrass (Lolium perenne L. Understanding the genetic control of freezing tolerance would aid in the development of cultivars of perennial ryegrass with improved adaptation to frost. A total number of 80 individuals (24 of High frost [HF]; 29 of Low frost [LF] and 27 of Unselected [US]) from the second generation of the two divergently selected populations and an unselected control population were genotyped using 278 genome-wide SNPs derived from Lolium perenne L. transcriptome sequence. Our studies showed that the HF and LF populations are very divergent after selection for freezing tolerance, whereas the HF and US populations are more similar. Linkage disequilibrium (LD) decay varied across the...
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  • freezing 冰冻
  • ryegrass 麦草
  • tolerance 耐性
  • perennial 多年生植物
  • linkage 连接
  • disequilibrium 非平衡
  • genetic 遗传的
  • frost 
  • hierarchical 分级
  • affecting 令人感动的