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Identification and Validation of a Novel Major Quantitative Trait Locus for Plant Height in Common Wheat (Triticum aestivum L.).

ABSTRACT: Plant height (PH) plays a pivotal role in plant morphological architecture and is associated with yield potential in wheat. For the quantitative trait locus (QTL) analysis, a recombinant inbred line population was developed between varieties differing significantly in PH. Two major QTL were identified on chromosomes 4B (QPh.sicau-4B) and 6D (QPh.sicau-6D) in multiple environments, which were then validated in two different backgrounds by using closely linked markers. QPh.sicau-4B explained 10.1-21.3% of the phenotypic variance, and the location corresponded to the dwarfing gene Rht-B1. QPh.sicau-6D might be a novel QTL for PH, explaining 6.6-13.6% of the phenotypic variance and affecting spike length, thousand-kernel weight, and spikelet compactness. Three candidate genes associated with plant growth and development were identified in the physical interval of QPh.sicau-6D. Collectively, we identified a novel stable and major PH QTL, QPh.sicau-6D, which could aid in the development of closely linked markers for marker-assisted breeding and cloning genes underlying this QTL.

SUBMITTER: Wang Z 

PROVIDER: S-EPMC7642865 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Identification and Validation of a Novel Major Quantitative Trait Locus for Plant Height in Common Wheat (<i>Triticum aestivum</i> L.).

Wang Zhiqiang Z   Hu Haiyan H   Jiang Xiaojun X   Tao Yang Y   Lin Yu Y   Wu Fangkun F   Hou Shuai S   Liu Shihang S   Li Caixia C   Chen Guangdeng G   Liu Yaxi Y  

Frontiers in genetics 20201022

Plant height (PH) plays a pivotal role in plant morphological architecture and is associated with yield potential in wheat. For the quantitative trait locus (QTL) analysis, a recombinant inbred line population was developed between varieties differing significantly in PH. Two major QTL were identified on chromosomes 4B (<i>QPh.sicau-4B</i>) and 6D (<i>QPh.sicau-6D</i>) in multiple environments, which were then validated in two different backgrounds by using closely linked markers. <i>QPh.sicau-4  ...[more]

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