ZmSO的遗传变异对玉米幼苗ABA反应和抗旱性的影响

IF 6 1区农林科学 Q1 AGRONOMY

Crop Journal Pub Date : 2023-08-01 DOI:10.1016/j.cj.2023.02.004

Zongliang Xia , Fangfang Liu , Meiping Wang , Jiafa Chen , Zijian Zhou , Jianyu Wu

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引用次数: 1

摘要

缺水会影响玉米的生长和产量。鉴定和部署优异的耐旱等位基因对于玉米抗逆性的遗传改良是必要的。我们先前的研究表明，玉米亚硫酸盐氧化酶（SO）催化亚硫酸盐氧化为硫酸盐，并可能参与干旱反应。但尚不清楚ZmSO的自然变异是否与玉米的抗旱性直接相关。在本研究中，我们使用基因关联分析和转基因方法表明ZmSO与玉米幼苗的耐旱性有关。ZmSO启动子区含有两个ABA响应元件的14bp插入变异赋予了ABA诱导表达，从而提高了耐旱性。这种有利等位基因的遗传选择提高了抗旱性。本研究鉴定了与硫代谢相关的优良等位基因，以提高玉米抗旱性。

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Genetic variation in ZmSO contributes to ABA response and drought tolerance in maize seedlings

Water scarcity impairs maize growth and yield. Identification and deployment of superior drought-tolerance alleles is desirable for the genetic improvement of stress tolerance in maize. Our previous study revealed that maize sulfite oxidase (SO) catalyzes the oxidation of sulfite to sulfate and may be involved in drought response. But it was unclear whether the natural variation in ZmSO is directly associated with the drought resistance of maize. In the present study, we showed that ZmSO was associated with drought tolerance in maize seedlings, using gene association analysis and a transgene approach. A 14-bp insertion variation, containing two ABA-responsive elements, in the promoter region of ZmSO conferred ABA-inducible expression, leading to increased drought tolerance. Genetic selection of this favorable allele increased drought tolerance. This study has identified elite alleles associated with sulfur metabolism for improving maize drought resistance.

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来源期刊

Crop Journal Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

9.90

自引率

3.00%

发文量

638

审稿时长

41 days

期刊介绍： The major aims of The Crop Journal are to report recent progresses in crop sciences including crop genetics, breeding, agronomy, crop physiology, germplasm resources, grain chemistry, grain storage and processing, crop management practices, crop biotechnology, and biomathematics. The regular columns of the journal are Original Research Articles, Reviews, and Research Notes. The strict peer-review procedure will guarantee the academic level and raise the reputation of the journal. The readership of the journal is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic levels.