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Genetic control of juvenile growth and botanical architecture in an ornamental woody plant Prunus mume Sieb. et Zucc. as revealed by a high-density linkage map

机译:观赏木本植物李子梅Sieb中幼虫生长和植物结构的遗传控制。 et Zucc。如高密度链接图所示

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摘要

Mei, Prunus mume Sieb. et Zucc., is an ornamental plant popular in East Asia and, as an important member of genus Prunus, has played a pivotal role in systematic studies of the Rosaceae. However, the genetic architecture of botanical traits in this species remains elusive. This paper represents the first genome-wide mapping study of quantitative trait loci (QTLs) that affect stem growth and form, leaf morphology and leaf anatomy in an intraspecific cross derived from two different mei cultivars. Genetic mapping based on a high-density linkage map constricted from 120 SSRs and 1,484 SNPs led to the detection of multiple QTLs for each trait, some of which exert pleiotropic effects on correlative traits. Each QTL explains 3-12% of the phenotypic variance. Several leaf size traits were found to share common QTLs, whereas growth-related traits and plant form traits might be controlled by a different set of QTLs. Our findings provide unique insights into the genetic control of tree growth and architecture in mei and help to develop an efficient breeding program for selecting superior mei cultivars.
机译:梅,李梅。 et Zucc。是一种在东亚流行的观赏植物,并且是李属的重要成员,在蔷薇科的系统研究中发挥了关键作用。但是,该物种植物性状的遗传结构仍然难以捉摸。本文代表了第一个全基因组范围内的定量性状基因座(QTL)定位研究,该基因座影响来自两个不同梅品种的种内杂交的茎生长和形态,叶片形态和叶片解剖结构。基于从120个SSR和1,484个SNP压缩而来的高密度连锁图谱的遗传图谱,导致检测到每个性状的多个QTL,其中一些对相关性状产生多效性作用。每个QTL解释了3-12%的表型差异。发现几种叶片大小性状具有相同的QTL,而与生长相关的性状和植物形态性状可能受一组不同的QTL控制。我们的发现提供了对梅树生长和建筑遗传控制的独特见解,并有助于制定一个有效的育种计划,以选择优良的梅品种。

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