控制狐尾黍黄仁色素的关键基因 SiPSY1 的单倍型变异和 KASP 标记

IF 6 1区 农林科学 Q1 AGRONOMY
Rongjun Zuo , Yanyan Zhang , Yanbing Yang , Chunfang Wang , Hui Zhi , Linlin Zhang , Sha Tang , Yanan Guan , Shunguo Li , Ruhong Cheng , Zhonglin Shang , Guanqing Jia , Xianmin Diao
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引用次数: 0

摘要

类胡萝卜素的生物合成和积累对决定作物产品的营养和商业价值非常重要。类胡萝卜素引起的成熟果仁黄色素沉着被认为是狐尾粟的一个重要品质特征,而狐尾粟是一种古老的、在世界各地广泛种植的谷类作物。通过全基因组关联分析(GWAS)确定了与狐尾粟籽粒中黄色素含量(YPC)、叶黄素和玉米黄质相关的基因组区域,并通过基因敲除和过表达分析确认 SiPSY1(植物烯合成酶 1,调节类胡萝卜素 40 碳骨架的形成)是所有这三种成分的主要贡献者。SiPSY1 在幼苗、叶片、圆锥花序和成熟种子中均有表达,并亚细胞定位于叶绿体。SiPSY1 在 15 DAP 未成熟谷粒中的转录对成熟种子中的 YPC 起作用。在狐尾黍的驯化过程中,SiPSY1的选择与成熟谷粒中YPC的增加相结合得到了证实。单倍型分析表明,SiPSY1的表达水平可作为未来育种计划的选择目标,并开发了一种KASP标记,用于在育种中选择有利的SiPSY1等位基因。这项工作的成果将有利于狐尾黍及其他谷类作物品种的营养和商业改良。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Haplotype variation and KASP markers for SiPSY1 – A key gene controlling yellow kernel pigmentation in foxtail millet

Carotenoid biosynthesis and accumulation are important in determining nutritional and commercial value of crop products. Yellow pigmentation of mature kernels caused by carotenoids is considered a vital quality trait in foxtail millet, an ancient and widely cultivated cereal crop across the world. Genomic regions associated with yellow pigment content (YPC), lutein and zeaxanthin in foxtail millet grains were identified by genome-wide association analysis (GWAS), and SiPSY1 (Phytoene synthase 1 which regulates formation of the 40-carbon backbone of carotenoids) was confirmed as the main contributor to all three components by knockout and overexpression analysis. SiPSY1 was expressed in seedlings, leaves, panicles, and mature seeds, and was subcellularly localized to chloroplasts. Transcription of SiPSY1 in 15 DAP immature grains was responsible for YPC in mature seeds. Selection of SiPSY1 combined with increased YPC in mature grains during domestication of foxtail millet was confirmed. Haplotype analysis suggested that expression level of SiPSY1 could be a selection target for future breeding programs, and a KASP marker was developed for selection of favorable SiPSY1 alleles in breeding. The results of this work will benefit nutritional and commercial improvement of foxtail millet varieties, as well as other cereal crops.

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来源期刊
Crop Journal
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.
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