基于染色体片段置换系群体检测水稻株型性状QTL
Acta Agronomica Sinica(2022)
Abstract
株型是由多个形态和生理性状集成的复合性状,它与水稻产量密切相关.挖掘优异株型等位基因或QTL,对水稻超高产育种具有重要意义.本研究利用籼稻昌恢121和粳稻Koshihikari构建的208个染色体片段置换系(chromosome segment substitution lines,CSSLs),在3个环境下,对控制株高、剑叶形态和分蘖数的QTL进行检测,共鉴定到35个株型性状QTL,分布于11条染色体上(除9号染色体以外),解释表型变异2.00%~22.86%.值得关注的是qPH-1-1、qFLW-6和qFLA-3均能在3个环境下被检测到,其中qFLW-6为1个新鉴定到的剑叶宽QTL.对qPH-1-1和qFLA-3位点进行鉴定,验证了这2个位点等位基因的加性效应和环境稳定性.本研究为株型性状QTL的进一步精细定位、克隆及分子辅助聚合育种奠定了基础.
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Key words
chromosome segment substitution lines,qtl mapping,plant architecture,rice
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