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首页> 外文期刊>Israel Journal of Plant Sciences >Comparative QTL mapping of fruit size and shape in tomato and pepper.
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Comparative QTL mapping of fruit size and shape in tomato and pepper.

机译：番茄和辣椒中果实大小和形状的比较QTL定位图。

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摘要

Fruit size and shape are among the most important traits that were under selection during domestication of the fruit-bearing Solanaceae crops, tomato and pepper. To determine the level of conservation of the locations of quantitative trait locus (QTL) controlling these traits in the two species, we conducted whole genome comparative QTL analysis for fruit weight, pericarp thickness, and fruit shape. The pepper QTLs data were obtained from previous studies using two mapping populations from crosses of the same blocky-type parent, cv. Maor (Capsicum annuum), with small-fruited accessions of C. annuum and C. frutescens. The tomato QTLs data were derived from the analysis of two populations containing introgressions from Solanum pennellii and S. habrochaites in the background of the cultivated tomato S. lycopersicum. A total of 95 QTLs in 34 genomic regions were detected in the four populations. Most of the QTLs (52%, 64%, and 89% for fruit weight, pericarp thickness, and fruit shape, respectively) were population-specific. The degree of conservation of the QTL locations in pepper and tomato varied among the traits; eight QTLs for fruit weight, five QTLs for pericarp thickness, and only one QTL for fruit shape were identified in common genomic regions in the two genera. Only two QTLs for fruit weight were found to be common in all four populations. The difference in the degree of QTL conservation in pepper and tomato between fruit weight and fruit shape indicates that while the genetic control of fruit weight is in part similar in pepper and tomato and convergent domestication in these crops resulted from mutations and selection at common loci, selection for fruit shape occurred for the most part at independent loci in these two genera..
机译：果实大小和形状是在含果实茄科作物，番茄和胡椒的驯化过程中要选择的最重要特征之一。为了确定控制两个物种中这些性状的数量性状基因座（QTL）位置的保守程度，我们对果实重量，果皮厚度和果实形状进行了全基因组比较QTL分析。辣椒的QTL数据是从以前的研究中获得的，这些数据使用的是来自同一块状亲本cv的杂交的两个作图群体。摩尔（Capsicum annuum），小果种为C. annuum和C. frutescens。番茄QTL数据来自对两个在番茄栽培番茄中均含有茄属和茄属渗入菌的渗入的种群的分析。在这四个种群中共检测到34个基因组区域中的95个QTL。大多数QTL（特定于果实重量，果皮厚度和果实形状分别为52％，64％和89％）是针对特定人群的。辣椒和番茄中QTL定位的保守程度因性状而异。在两个属的常见基因组区域中，仅鉴定了8个果实重量QTL，5个果皮厚度QTL和1个果实形状QTL。在所有四个人群中，只有两个果实重量的QTL是常见的。辣椒和番茄的QTL保守程度在果实重量和果实形状之间存在差异，这表明尽管辣椒和番茄的果实重量遗传控制部分相似，但这些作物的趋同驯化归因于常见基因座的突变和选择，水果形状的选择大部分发生在这两个属的独立基因座上。

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