Identification of QTLs affecting adaptive traits in Castanea sativa Mill
Identification of QTLs affecting adaptive traits in Castanea sativa Mill
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DOI：
10.1111/j.1365-3040.2004.01214.x
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发表时间：
2004-09-01
影响因子：
7.3
通讯作者：
Villani, F
中科院分区：
文献类型：
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作者：
Casasoli, M;Pot, D;Villani, F
对番栗F-1后代的3个不同适应性状进行了QTL分析。母本和父本分别来自两个适应干旱和潮湿环境的板栗种群。在3年的时间内检测到芽冲、生长和碳同位素鉴别的qtl。芽集也记录在最后一年的测量。检测到35个物候qtl， 28个生长qtl和17个碳同位素qtl，其中大多数qtl解释了总表型方差的低至中等比例。qtl分布在整个基因组中。所有性状均鉴定出了时间稳定的qtl，物候特征表明稳定qtl的比例较高。观察到不同适应性状的qtl之间存在有趣的表型相关和共定位，从而提出了关于雌性亲本对干旱的遗传适应的假设。
A QTL analysis for three different adaptive traits was performed in an F-1 progeny of Castanea sativa Mill. The female and male parents originated from two Turkish chestnut populations adapted to a drought and humid environment, respectively. QTLs for bud flush, growth and carbon isotope discrimination were detected over a 3-year period. Bud set was also recorded in the last year of measurement. Thirty-five individual QTLs were detected for phenology, 28 for growth and 17 for carbon isotope discrimination, most of them explaining a low to moderate proportion of the total phenotypic variance. QTLs were distributed throughout the whole genome. Temporally stable QTLs were identified for all the traits analysed, with phenology showing the higher proportion of stable QTLs. Interesting phenotypic correlations and co-localizations among QTLs for different adaptive traits were observed, allowing the formulation of an hypothesis about the genetic adaptation of the female parent to drought.