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Dissection of quantitative trait loci for root characters and day length sensitivity in SynOpDH wheat (Triticum aestivum L.) bi-parental mapping population
Plant Genetic Resources ( IF 1.1 ) Pub Date : 2020-08-03 , DOI: 10.1017/s1479262120000192
Harun Bektas , Christopher Earl Hohn , John Giles Waines

The genetics of the root system is still not dissected for wheat and lack of knowledge prohibits the use of marker-assisted selection in breeding. To understand the genetic mechanism of root development, Synthetic W7984 × Opata M85 doubled-haploid (SynOpDH) mapping population was evaluated for root and shoot characteristics in PVC tubes until maturity. Two major quantitative trait loci (QTLs) for total root biomass were detected on homoeologous chromosomes 2A and 2D with logarithm of the odds scores between 6.25–10.9 and 11.8–20.86, and total phenotypic effects between 12.7–17.7 and 26.6–40.04% in 2013 and 2014, respectively. There was a strong correlation between days to anthesis and root and shoot biomass accumulation (0.50–0.81). The QTL for biomass traits on chromosome 2D co-locates with QTL for days to anthesis. The effect of extended vegetative growth, caused by photoperiod sensitivity (Ppd) genes, on biomass accumulation was always hypothesized, this is the first study to genetically support this theory.

中文翻译:

SynOpDH 小麦 (Triticum aestivum L.) 双亲作图群体根性状和日长敏感性的数量性状位点解剖

小麦的根系遗传学仍未剖析,缺乏知识禁止在育种中使用标记辅助选择。为了了解根发育的遗传机制,对合成 W7984 × Opata M85 双单倍体 (SynOpDH) 作图种群在 PVC 管中的根和芽特征进行了评估,直至成熟。2013 年在同源染色体 2A 和 2D 上检测到总根生物量的两个主要数量性状基因座 (QTL),优势分数的对数在 6.25-10.9 和 11.8-20.86 之间,总表型效应在 12.7-17.7 和 26.6-40.04% 之间和 2014 年,分别。开花天数与根和茎生物量积累之间存在很强的相关性(0.50-0.81)。2D 染色体上生物量性状的 QTL 与开花期的 QTL 位于同一位置。ppd) 基因,关于生物量积累一直是假设的,这是第一个在基因上支持这一理论的研究。
更新日期:2020-08-03
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