NDLI: Fine mapping of the Rj4 locus, a gene controlling nodulation specificity in soybean

Content Provider	Springer Nature Link
Author	Tang, Fang Yang, Shengming Liu, Jinge Gao, Muqiang Zhu, Hongyan
Copyright Year	2013
Abstract	Leguminous plants have the ability to make their own nitrogen fertilizer by forming a root nodule symbiosis with nitrogen-fixing soil bacteria, collectively called rhizobia. This biological process plays a critical role in sustainable agriculture because it reduces the need for external nitrogen input. One remarkable property of legume–rhizobial symbiosis is its high level of specificity, which occurs at both inter- and intra-species levels and takes place at multiple phases of the interaction, ranging from initial bacterial infection and nodulation to late nodule development associated with nitrogen fixation. Knowledge of the molecular mechanisms controlling symbiotic specificity will facilitate the development of new crop varieties with improved agronomic potential for nitrogen-fixing symbiosis. In this report, we describe fine mapping of the Rj4 locus, a gene controlling nodulation specificity in soybean (Glycine max). The Rj4 allele prevents the host plant from nodulation with many strains of Bradyrhizobium elkanii, which are frequently present in soils of the southeastern USA. Since B. elkanii strains are poor symbiotic partners of soybean, cultivars containing an Rj4 allele are considered favorable. We have delimited the Rj4 locus within a 57-kb genomic region on soybean chromosome 1. The data reported here will facilitate positional cloning of the Rj4 gene and the development of genetic markers for marker-assisted selection in soybean.
Starting Page	691
Ending Page	700
Page Count	10
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	33
Issue Number	3
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-11-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Legume Soybean Nitrogen fixation Nodulation Host specificity 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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