NDLI: Identification and distribution of VERNALIZATION1 alleles in Chinese barley (Hordeum vulgare) germplasm

Content Provider	Springer Nature Link
Author	Zhang, C. H. Xu, D. A. Zhao, C. H. Yu, M. Q. Chen, J. Qiang, X. L. Zhang, J.
Copyright Year	2015
Abstract	VERNALIZATION1 (VRN1) is a central regulator of the vernalization requirement, which affects the yield and geographical distribution of Triticeae crops through regulation of the flowering time. The first intron (Intron I) of VRN1 contains putative cis-elements that mediate repression of VRN1 expression. Allelic variations in Intron I are closely associated with increased VRN1 expression in vernalization-responsive accessions in the absence of vernalization. In this study, diagnostic molecular markers were developed to distinguish the main 12 known alleles, including a new allele, of barley (Hordeum vulgare) VRN1 (HvVRN1), and to investigate HvVRN1 alleles in 373 barley varieties from major agroecological regions in China. The new allele, HvVRN1-11, with a 3172-bp deletion in Intron I of HvVRN1, was identified in a Chinese barley landrace. Analysis of eight polymorphic sites flanking major variations in Intron I of HvVRN1 classified the 12 HvVRN1 alleles into five distinct groups. Compared with modern commercial barley, landraces possessed greater genetic diversity and contained the majority of HvVRN1 alleles, especially in the winter barley regions. HvVRN1 diversity in terms of allele number reduced significantly (P < 0.01) along with higher growing latitudes, but increased in accessions carrying the winter HvVRN2 allele. Wild-type HvVRN1 and the HvVRN1-8 allele showed the most widespread distribution in most regions whereas HvVRN1-1 & HvVRN1-8, and HvVRN1-5 are predominant in the Inner Mongolian Plateau spring barley region and the Northeast Plain spring barley region, respectively, with relatively higher latitudes. Compared with landraces, the frequency of HvVRN1-8 decreased while wild-type HvVRN1 increased significantly (P < 0.01) in commercial varieties. Our study classified HvVRN1 genetic diversity in a large collection of Chinese germplasm and provided a tool for identifying HvVRN1 alleles in barley breeding populations.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	35
Issue Number	8
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hordeum vulgare VERNALIZATION1 Molecular markers Distribution Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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