数字农科院2.0

Inheritance And Qtl Analysis Of Chilling And Heat Requirements For Flowering In An Interspecific Almond X Peach (Texas X Earlygold) F-2 Population

文献类型： 外文期刊

作者： Cantin, CM; Wang, XW; Almira, M; Arus, P; Eduardo, I

作者机构：

关键词： Chilling Requirements; Heat Requirements; Peach; Flowering

期刊名称： EUPHYTICA

ISSN： 0014-2336

年卷期： 2020 年 216 卷 3 期

页码：

收录情况： JCR（2021版）

摘要： Blooming in temperate fruit species is triggered by chilling and heat requirements (CR and HR), with a wide range of requirements within the same species. CR for flower bud dormancy release has become a limiting factor for geographical adaptation of fruit trees in warmer regions. The present study investigated the genetic basis of CR and HR to break dormancy and flowering time (FT) in an almond x peach F-2 progeny. FT, HR and CR were evaluated over two consecutive years (2015/2016 and 2016/2017). Seven out of the eight identified quantitative trait loci (QTLs) were found in both periods of analysis. They affected eight traits, and included a consistent QTL for breaking dormancy, CR and HR. Two of them, affecting FT and HR for FT (GDHF), colocalized in G1, and the remaining QTLs, affecting chilling and heat requirements, both influenced by dormancy breaking (DB), were located in G6. These results indicate that factors not related to DB affect flowering time in this population. Implications of the results in peach breeding are discussed.

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