QTL architecture of reproductive fitness characters in Brassica rapa.
QTL architecture of reproductive fitness characters in Brassica rapa.
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DOI：
10.1186/1471-2229-14-66
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发表时间：
2014-03-18
影响因子：
5.3
通讯作者：
Weinig C
中科院分区：
文献类型：
--
作者：
Dechaine JM;Brock MT;Weinig C
繁殖输出对于寻求增加种子产量的农学家和对理解自然选择感兴趣的进化生物学家都至关重要。我们研究了不同的生殖适合度性状的重组自交系（RILs）开发的作物（种子油）×野生型（快速循环）基因型的芜菁在田间和温室环境中的遗传结构。几个适合度性状表现出很强的相关性和QTL共定位跨环境（天抽薹，果实长度和种子颜色）。总果数在不同环境中不相关，影响该性状的大多数QTL具有环境特异性。大多数健身组件呈正相关，符合生活史理论，基因型变异的资源获取掩盖权衡。最后，我们发现的证据，跨代多效性，即母亲的天数，以抽薹与后代发芽天数呈负相关。将这种代际相关性的QTL定位到含有一个FLOWERNIA LOCUS C拷贝的基因组区域，FLOWERNIA LOCUS C是一个已知影响开花天数和发芽表型的遗传位点。本研究描述了B中重要适合度/产量性状的代内和代间遗传结构。拉帕。几个已鉴定的QTL是作物产量改良精细定位的合适候选者。具体而言，brFLC 1，值得进一步调查作为一个潜在的调节物候代之间。
Reproductive output is critical to both agronomists seeking to increase seed yield and to evolutionary biologists interested in understanding natural selection. We examine the genetic architecture of diverse reproductive fitness traits in recombinant inbred lines (RILs) developed from a crop (seed oil) × wild-like (rapid cycling) genotype of Brassica rapa in field and greenhouse environments. Several fitness traits showed strong correlations and QTL-colocalization across environments (days to bolting, fruit length and seed color). Total fruit number was uncorrelated across environments and most QTL affecting this trait were correspondingly environment-specific. Most fitness components were positively correlated, consistent with life-history theory that genotypic variation in resource acquisition masks tradeoffs. Finally, we detected evidence of transgenerational pleiotropy, that is, maternal days to bolting was negatively correlated with days to offspring germination. A QTL for this transgenerational correlation was mapped to a genomic region harboring one copy of FLOWERING LOCUS C, a genetic locus known to affect both days to flowering as well as germination phenotypes. This study characterizes the genetic structure of important fitness/yield traits within and between generations in B. rapa. Several identified QTL are suitable candidates for fine-mapping for the improvement of yield in crop Brassicas. Specifically, brFLC1, warrants further investigation as a potential regulator of phenology between generations.
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影响因子：
5.4
作者：
Cai, HW;Morishima, H
通讯作者：
Morishima, H
影响因子：
1.9
作者：
CHEN, BY;HENEEN, WK
通讯作者：
HENEEN, WK
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作者：
Cai, Hai-Ya;Diao, Shu;Zhang, Zhi-Hong
通讯作者：
Zhang, Zhi-Hong
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2.9
作者：
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Osenberg, C. W.
影响因子：
64.8
作者：
Bastow, R;Mylne, JS;Dean, C
通讯作者：
Dean, C