Genetic and phenotypic analyses reveal major quantitative loci associated to fruit size and shape traits in a non-flat peach collection ( P. persica L. Batsch)
作者机构：Universita degli Studi di Milano-DiSAAMilanoItaly Universita degli Studi della Tuscia-DAFNEViterboItaly
出 版 物：《Horticulture Research》 (园艺研究（英文）)
年 卷 期：2021年第8卷第1期
页 面：3211-3227页
核心收录：
学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学]
基 金：Università degli Studi di Milano UniMi
摘 要：Fruit size and shape are critical agronomical and pomological attributes and prime targets in peach breeding *** from the flat peach type,a Mendelian trait well-characterized at the genetic level,ample diversity of fruit size and shapes is present across peach ***,knowledge of the underlying genomic loci remains *** this work,fruit size and shape were assessed in a collection of non-flat peach accessions and selections,under controlled fruit load *** architecture of these traits was then dissected by combining association and linkage mapping,revealing a major locus on the proximal end of chromosome 6(qSHL/Fs6.1)explaining a large proportion of phenotypic variability for longitudinal shape and also affecting fruit size.A second major locus for fruit longitudinal shape(qSHL5.1),probably also affecting fruit size,was found co-localizing at locus G,suggesting pleiotropic effects of peach/nectarine *** additional QTL for fruit longitudinal shape(qSHL6.2)was identi fied in the distal end of chromosome 6 in a cross with an ornamental double-flower peach and co-localized with the Di2 locus,controlling flower *** assisting breeding activities,knowledge of loci controlling fruit size and shape paves the way for more in-depth studies aimed at the identification of underlying genetic variant(s).
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