Quantitative Trait Loci Mapping for Theobromine and Caffeine Contents in Tea Plant (Camellia sinensis),Journal of Agricultural and Food Chemistry

当前位置： X-MOL 学术 › J. Agric. Food Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Quantitative Trait Loci Mapping for Theobromine and Caffeine Contents in Tea Plant (Camellia sinensis)
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-11-28 00:00:00 , DOI: 10.1021/acs.jafc.8b05355
Jian-Qiang Ma ₁ , Ji-Qiang Jin ₁ , Ming-Zhe Yao ₁ , Chun-Lei Ma ₁ , Yan-Xia Xu ₁ , Wan-Jun Hao ₁ , Liang Chen ₁

Affiliation

Understanding the genetic basis of theobromine and caffeine accumulation in the tea plant is important due to their contribution to tea flavor. Quantitative trait loci (QTL) analyses were carried out to identify genetic variants associated with theobromine and caffeine contents and ratio using a pseudo-testcross population derived from an intervarietal cross between two varieties of Camellia sinensis. A total of 10 QTL controlling caffeine content (CAF), theobromine content (TBR), sum of caffeine and theobromine (SCT), and caffeine-to-theobromine ratio (CTR) were identified over four measurement years. The major QTL controlling CAF, qCAF1, was mapped onto LG01 and validated across years, explaining an average of 20.1% of the phenotypic variance. The other QTL were detected in 1 or 2 years, and of them there were four, two, and three for TBR, SCT, and CTR, respectively. The present results provide valuable information for further fine mapping and cloning functional genes and for genetic improvement in tea plant.

中文翻译：

数量性状基因座定位为可可碱和咖啡因含量的茶树（茶树）

了解可可碱和咖啡因在茶树中的积累的遗传基础非常重要，因为它们对茶的风味有贡献。进行了数量性状基因座（QTL）分析，以使用源自茶树两个品种之间的种间杂种的假试验性杂种群体来鉴定与可可碱和咖啡因含量和比例有关的遗传变异体。在四个测量年中，共确定了10个控制咖啡因含量（CAF），可可碱含量（TBR），咖啡因和可可碱总和（SCT）以及咖啡因与可可碱比率（CTR）的QTL。控制CAF的主要QTL，qCAF1，被映射到LG01并经过多年验证，解释了平均20.1％的表型差异。在1年或2年内检测到另一个QTL，其中TBR，SCT和CTR分别为4、2和3。本结果为进一步精细定位和克隆功能基因以及茶树的遗传改良提供了有价值的信息。

更新日期：2018-11-28

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11