Abstract
In the era of genomic-assisted breeding for crop improvement, developing new molecular markers and validating them for use in breeding programs are the prelude. Dolichos bean is one of the most important vegetable legume crops owing to its nutrient-rich green pods used as vegetables. Limitations in genomic resources, including molecular markers, restrict the accelerated improvement of the crop. In the present investigation, a set of 430 new simple sequence repeat markers was developed from sequence information of a reference variety. These markers included di- and tri-nucleotide repeats. The markers were assayed on an association panel, which was evaluated for green pod yield over 5 years. A multi-locus model, FarmCPU, was used to assess the marker-trait association analysis. A total of 106 marker-trait associations were identified using an efficient mixed-model approach. Tri-nucleotide repeats were more informative and predominantly associated with trait. Among these markers, 17 were associated with a high level of significance. Markers LP-D-68 and LP-D-14 were identified with a high level of significance in 5-year pooled data and explained 12.70% and 12% of the phenotypic variance, respectively. These markers associated with a high level of confidence have significant scope for use in marker-assisted selection programmes. Other associated markers may be utilized for improving parents through marker-assisted recurrent selection or genomic selection programs.
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The data generated during the experimentation is presented as tables and supplementary tables in the manuscript.
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Funding
The study was financially supported by the Indian Council of Agricultural Research (ICAR)—World Bank funded project to carry out part of the research (ICAR_NAHEP; F. No./NAHEP/CAAST/2018–19/08).
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SR and AC conceptualized the experiment. VS, MSV, and PVV: evaluation of association panel over years. VS and MSV genotyped the panel. SNC and AC: formal analysis and drafting the manuscript. SR edited the final version of the manuscript. All authors read, revised, and approved the manuscript.
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Communicated by: Izabela Pawłowicz
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Spoorthi, V., Ramesh, S., Sunitha, N.C. et al. Genetic dissection of green pod yield in dolichos bean, an orphan vegetable legume, using new molecular markers. J Appl Genetics (2024). https://doi.org/10.1007/s13353-024-00865-0
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DOI: https://doi.org/10.1007/s13353-024-00865-0