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首页> 外文期刊>BMC Plant Biology >Quantitative trait loci analysis and genome-wide comparison for silique related traits in Brassica napus
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Quantitative trait loci analysis and genome-wide comparison for silique related traits in Brassica napus

机译：甘蓝型油菜长角果相关性状的数量性状基因座分析和全基因组比较

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Background Yield of rapeseed is determined by three components: silique number, seed number per silique and thousand seed weight. Seed number per silique and thousand seed weight are influenced by silique length, seed density, silique breadth, silique thickness and silique volume. Some QTLs for silique traits have been reported in B. napus , however, no studies have focused on the six agronomic traits (seed number per silique, silique length, silique breadth, silique thickness, seed density and silique volume) simultaneously, and the genetic determinism of such complex traits have not been fully elucidated. Results In this study, the six silique traits were evaluated using 348 lines of a doubled haploid population, the KN population. The results showed that 2, 4, 1, 1 and 2 QTLs explaining?>?10?% of phenotypic variation were obtained for silique length, silique breadth, silique thickness, seed number per silique and silique volume, respectively. Notably, three major effect QTLs ( cqSB-C6-1 , cqSB-C6-2 and cqSV-C6-3 ) were identified in at least three environments, and 17 unique QTLs controlling at least two traits were obtained. A high-density consensus map containing 1225 markers was constructed for QTL comparison by combining the KN map with other five published maps. The comparative results revealed that 14, 13 and 11 QTLs for silique breadth, silique thickness and silique volume might be the potential new QTLs because few QTLs for these traits were reported in B. napus . In addition, potential new QTLs for silique length (11), seed number per silique (6) and seed density (5) were also identified. Twenty-five candidate genes underlying 27 QTLs for silique related traits were obtained. Conclusions This study constructed QTL analysis in B. napus , and obtained 60 consensus QTLs for six silique related traits. The potential new QTLs will enhance our understanding of the genetic control of silique traits, and the stable QTLs provided the targets for improving seed yield in future. These findings provided comprehensive insights into the genetic network affecting silique traits at QTL level in B. napus .
机译：背景油菜籽的产量取决于三个组成部分：长角果数，每长角果种数和千粒重。角果长度，种子密度，角果宽度，角果厚度和角果体积会影响每个角果的种子数量和千粒重。在甘蓝型油菜中已经报道了一些关于长角果性状的QTL，但是，没有研究集中在六个农艺性状（每长角果的种子数，长角果长度，长角果宽度，长角果厚度，种子密度和长角果体积）以及遗传上这种复杂特征的确定性尚未得到充分阐明。结果在这项研究中，使用348个双单倍体群体（KN群体）品系评估了六个长角果性状。结果表明，获得了2、4、1、1、1和2个QTL，分别解释了角果长度，角果宽度，角果厚度，每个角果种子数和角果体积。值得注意的是，在至少三个环境中鉴定出三个主要效应QTL（cqSB-C6-1，cqSB-C6-2和cqSV-C6-3），并获得了控制至少两个性状的17个独特的QTL。通过将KN图与其他五种已发布图结合，构建了包含1225个标记的高密度共有图，以进行QTL比较。比较结果表明，由于在甘蓝型油菜中报道的这些性状的QTL很少，因此14、13和11个QTL的角果宽度，角果厚度和角果体积可能是潜在的新QTL。此外，还确定了潜在的新的长角果长度（11），每长角果种子数（6）和种子密度（5）的QTL。获得了25个针对长角果相关性状的QTL的候选基因。结论本研究构建了甘蓝型油菜的QTL分析，并获得了60个与长角果相关性状的共有QTL。潜在的新QTL将加深我们对长角果性状遗传控制的了解，稳定的QTL为将来提高种子产量提供了目标。这些发现提供了对甘蓝型油菜QTL水平上影响群体性状的遗传网络的全面见解。

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