数字农科院2.0

qPH1.01, a dominant QTL that contributes to plant height and ear height in maize

文献类型： 外文期刊

作者： Chuan Chen;Shaoqi Yang;Ruiyu Zhang;Yuan Tian;Haotian Zhang;Yapeng Wang;Hongwei Zhang;Zhe Wang;Qin Yang

作者机构：

期刊名称： Plant Genome

ISSN： 1940-3372

年卷期： 2025 年 18 卷 4 期

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收录情况： SCIE（2025版）

摘要： Plant height (PH) is an important agronomic trait closely related to yield and lodging resistance. In this study, bulked segregant analysis coupled with next-generation sequencing (BSA-seq) approach was employed to identify quantitative trait loci (QTLs) for PH in a large F2 population generated from a cross between the tall maize (Zea mays L.) inbred line PH6WC and the short maize inbred line KA3321. Extreme high- and low-PH bulks were constructed by selecting 62 individuals each from the tails of the phenotypic distribution in the 617-member F2 population.  BSA-seq revealed four PH QTLs, two of which were validated in a random F2 population. qPH1.01, a novel QTL on chromosome 1, showed dominance effect for reducing both PH and ear height (EH). The KA3321 allele of qPH1.01 reduced PH by 8-12 cm and EH by 4-6 cm. Using recombinant-derived progeny testing strategy, qPH1.01 was fine-mapped to an interval of approximately 420 kb referring to B73 genome. Transcriptome data showed that qPH1.01 might influence PH and EH by regulating expression of hormone-related genes. The dominant QTL discovered in this study may facilitate the breeding of dwarf and high-density maize varieties.

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