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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Breeding
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1422957

QTL Mapping for Pod Quality and Yield Traits in Snap Bean (Phaseolus vulgaris L.)

Provisionally accepted
Serah N. Njau Serah N. Njau 1,2Travis Parker Travis Parker 2Jorge Duitama Jorge Duitama 3Paul Gepts Paul Gepts 2Edith E. Arunga Edith E. Arunga 1*
  • 1 Department of Water and Agricultural Resource Management, University of Embu, Embu, Kenya
  • 2 Department of Plant Sciences, University of California, Davis, Davis, California, United States
  • 3 3Department of Systems and Computing Engineering, University of Los Andes, Colombia, Bogotá, Cundinamarca, Colombia

The final, formatted version of the article will be published soon.

    Pod quality and yield traits in snap bean (Phaseolus vulgaris L.) influence consumer preferences, crop adoption by farmers, and the ability of the product to be commercially competitive locally and globally. The objective of the study was to identify the quantitative trait loci (QTL) for pod quality and yield traits in a snap × dry bean recombinant inbred line (RIL) population. A total of 184 F6 RILs derived from a cross between Vanilla (snap bean) and MCM5001 (dry bean) were grown in three field sites in Kenya and one greenhouse environment in Davis, CA, USA. They were genotyped at 5,951 single nucleotide polymorphisms (SNPs), and composite interval mapping was conducted to identify QTL for 16 pod quality and yield traits, including pod wall fiber, pod string, pod size, and harvest metrics. A combined total of 44 QTL were identified in field and greenhouse trials. The QTL for pod quality were identified on chromosomes Pv01, Pv02, Pv03, Pv04, Pv06, and Pv07, and for pod yield were identified on Pv08. Co-localization of QTL was observed for pod quality and yield traits. Some identified QTL overlapped with previously mapped QTL for pod quality and yield traits, with several others identified as novel. The identified QTL can be used in future marker-assisted selection in snap bean.

    Keywords: QTL mapping, Pod quality, Pod yield, Vegetable industry, snap bean, SNP, Phaseolus vulgaris

    Received: 24 Apr 2024; Accepted: 17 Jul 2024.

    Copyright: © 2024 Njau, Parker, Duitama, Gepts and Arunga. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Edith E. Arunga, Department of Water and Agricultural Resource Management, University of Embu, Embu, Kenya

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.