玉米(Zea mays L.)青贮品质性状的基因组图谱调查

IF 6 1区 农林科学 Q1 AGRONOMY
Jatin Sharma , Shubham Sharma , Krishna Sai Karnatam , Om Prakash Raigar , Chayanika Lahkar , Dinesh Kumar Saini , Sushil Kumar , Alla Singh , Abhijit Kumar Das , Priti Sharma , Ramesh Kumar
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引用次数: 0

摘要

尽管青贮饲料作为反刍动物的重要饲料来源具有长期的重要性,但其质量的提高却在很大程度上被忽视了。尽管影响玉米青贮饲料质量的数量性状位点(QTL)和基因已被大量报道,但只有少数已被有效地纳入育种计划。为了填补这一空白,本研究进行了一项全面的元 QTL(MQTL)分析,涉及从 14 项已发表的研究中收集的与青贮品质性状相关的 523 个 QTL。在这 523 个 QTL 中,有 405 个被投射到由 62,424 个遗传标记组成的共识图谱上,从而鉴定出 60 个 MQTL 和 8 个单体。MQTL的平均置信区间(CI)比源QTL小3.9倍。在 60 个已鉴定的 MQTL 中,有 9 个被归类为育种 MQTL,因为它们的 CI 较小、涉及的 QTL 较多且对表型变异的贡献较大。三分之一的 MQTL 与之前全基因组关联图谱研究中确定的 DNA 标记-性状关联共定位。在 MQTL 区域确定了 78 个影响青贮饲料质量的高置信度候选基因。这些基因和相关标记可能会推动玉米青贮品质的标记辅助育种。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Surveying the genomic landscape of silage-quality traits in maize (Zea mays L.)

Despite the longstanding importance of silage as a critical feed source for ruminants, its quality improvement has been largely overlooked. Although numerous quantitative trait loci (QTL) and genes affecting silage quality in maize have been reported, only a few have been effectively incorporated into breeding programs. Addressing this gap, the present study undertook a comprehensive meta-QTL (MQTL) analysis involving 523 QTL associated with silage-quality traits collected from 14 published studies. Of the 523 QTL, 405 were projected onto a consensus map comprising 62,424 genetic markers, resulting in the identification of 60 MQTL and eight singletons. The average confidence interval (CI) of the MQTL was 3.9-fold smaller than that of the source QTL. Nine of the 60 identified MQTL were classified as breeder’s MQTL owing to their small CIs, involvement of more QTL, and large contribution to phenotypic variation. One-third of the MQTL co-localized with DNA marker-trait associations identified in previous genome-wide association mapping studies. A set of 78 high-confidence candidate genes influencing silage quality were identified in the MQTL regions. These genes and associated markers may advance marker-assisted breeding for maize silage quality.

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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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