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RESEARCH ARTICLE

Transcriptome-wide development and utilisation of novel intron-length polymorphic markers in common vetch (Vicia sativa subsp. sativa)

Xingyi Wei A , Yitong Ma A , Qiuxia Wang A , Yanpeng Li A and Wenxian Liu https://orcid.org/0000-0002-6967-4092 A *
+ Author Affiliations
- Author Affiliations

A State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Western China Technology Innovation Center for Grassland Industry, Gansu Province, China; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.

* Correspondence to: liuwx@lzu.edu.cn

Handling Editor: Marta Santalla

Crop & Pasture Science 72(12) 1048-1057 https://doi.org/10.1071/CP21114
Submitted: 23 February 2021  Accepted: 28 August 2021   Published: 7 December 2021

© 2021 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Common vetch (Vicia sativa subsp. sativa) is one of the most economically important forage legumes, with high nutritional value and multiple uses. Although microsatellite markers have been developed and applied on a large scale for evaluation of common vetch germplasm, intron-length polymorphic (ILP) markers have not been systematically investigated and exploited. In this study, introns within the common vetch genome were located by aligning the RNA-Seq sequences of common vetch with barrel medic (Medicago truncatula), soybean (Glycine max) and Arabidopsis thaliana genome sequences, and then used for VsILP marker development. In total, 10 400 markers were generated from 44 582 common vetch unigenes. Of 300 randomly selected VsILP markers, 283 were successfully amplified in common vetch. Among these markers, 40 produced length variation in 30 accessions of common vetch, collectively yielding 166 alleles with an average of 4.0 alleles per locus. The polymorphic information content values extended from 0.06 to 0.81 with a mean of 0.49. Of the 283 VsILP markers, 84.8% exhibited transferability to other species, both leguminous (common vetch, lucerne (Medicago sativa), barrel medic, soybean, yellow sweet clover (Melilotus officinalis), Lotus corniculatus and Sophora alopecuroides) and non-leguminous (rice (Oryza sativa), Arabidopsis and tobacco (Nicotiana tabacum)). Here, we present the first large-scale development of ILP markers in common vetch and their utility in germplasm evaluation and transferability, which will be valuable for further comparative genomic studies, genetic relationship assessments, and marker-assisted breeding of leguminous and non-leguminous species.

Keywords: genetic diversity, genetic relationship, germplasm evaluation, intron-length polymorphism, marker-assisted breeding, molecular markers, transferability, Vicia sativa subsp. sativa.


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