Mapping of quantitative trait loci for carotenoid pigmentation in flower tepals of Asiatic hybrid lily
Mapping of quantitative trait loci for carotenoid pigmentation in flower tepals of Asiatic hybrid lily
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DOI：
10.1016/j.scienta.2004.08.007
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发表时间：
2005-03-15
影响因子：
4.3
通讯作者：
Yamagishi, M
中科院分区：
文献类型：
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作者：
Nakano, M;Nakatsuka, A;Yamagishi, M
花色是观赏植物的重要性状之一。为阐明亚洲百合花被片类胡萝卜素色素形成的遗传基础，我们评价了从“蒙特勒”（具有少量的类胡萝卜素）和“康涅狄格王”（具有大量的类胡萝卜素）之间杂交得到的F1植物中花被片-类胡萝卜素含量的分离，并将类胡萝卜素色素沉着的遗传基因座定位到我们先前构建的“蒙特勒”和“康涅狄格王”的分子连锁图上。花被片类胡萝卜素含量在F-1代植株中表现出连续分离，表明多个基因与该性状相关。数量性状基因座（QTL）分析在“蒙特勒”连锁图的第六连锁群上发现了一个QTL qCARmon 6。qCARmon 6对总表型变异的解释率为58.2%，即该位点对类胡萝卜素积累有较大影响。qCARmon 6定位在花被片类胡萝卜素含量较低的“蒙特勒”连锁群上，表明该位点对类胡萝卜素色素的形成具有显性负效应。(C)2004 Elsevier B. V.保留所有权利。
Flower pigmentation is one of the most important traits for ornamental plants. To clarify the genetic basis for carotenoid pigmentation in flower tepals of Asiatic hybrid lily (Lilium sp.), we evaluated the segregation of a tepal-carotenoid content among F, plants derived from a cross between 'Montreux' (having a small amount of carotenoids) and 'Connecticut King' (having a large amount of carotenoids), and mapped genetic loci for the carotenoid pigmentation onto the molecular linkage maps of 'Montreux' and 'Connecticut King' that we constructed previously. The tepal-carotenoid content among the F-1 plants showed continuous segregation, indicating that several genes are associated with this trait. Quantitative trait loci (QTL) analysis identified one QTL, qCARmon6, on the sixth linkage group of the 'Montreux' map. qCARmon6 explained 58.2% of the total phenotypic variation, that is, this locus had a large effect on the carotenoid accumulation. The result that qCARmon6 was mapped on the linkage group of 'Montreux' which has a small amount of carotenoid pigments in tepals indicates that this locus has a dominant negative effect on carotenoid pigmentation. (C) 2004 Elsevier B.V. All rights reserved.