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ORIGINAL RESEARCH article

Front. Hortic.
Sec. Breeding and Genetics
Volume 3 - 2024 | doi: 10.3389/fhort.2024.1365567
This article is part of the Research Topic Harnessing The Potential of De Novo Domestication For Sustainable Healthy Diets View all 3 articles

Genome-wide mapping uncovers significant quantitative trait loci associated with Yam Mosaic virus infection, yield and dry matter content in White Guinea Yam (Dioscorea rotundata Poir.)

Provisionally accepted
Emmanuel A. ADJEI Emmanuel A. ADJEI 1,2,3Thomas Lapaka Odong Thomas Lapaka Odong 2Williams Esuma Williams Esuma 4Ranjana Bhattacharjee Ranjana Bhattacharjee 5Paterne A. AGRE Paterne A. AGRE 5*Patrick O. Adebola Patrick O. Adebola 5Emmanuel B. Chamba Emmanuel B. Chamba 1Asrat Asfaw Asrat Asfaw 5Isaac O. Dramadri Isaac O. Dramadri 2,3Sharon T. Mbabazi Sharon T. Mbabazi 2,3Richard Edema Richard Edema 2,3Alfred A. Ozimati Alfred A. Ozimati 3,6Mildred Ochwo-Ssemakula Mildred Ochwo-Ssemakula 2Titus Alicai Titus Alicai 7
  • 1 CSIR-Savanna Agricultural Research Institute, Nyankpala, Ghana
  • 2 Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
  • 3 Makerere Regional Center for Crop Improvement, College of Agricultural and Environmental Sciences, Makerere University, Kampala, Uganda
  • 4 National Crops Resources Research Institute (NaCRRI), Kampala, Uganda
  • 5 International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria
  • 6 Department of Plant Sciences, Microbiology and Biotechnology, College of Natural Sciences, Makerere University, Kampala, Uganda
  • 7 National Agricultural Research Laboratories, National Agricultural Research Organization (NARO), Kampala, Uganda

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

    Yam is an important crop for food security in East and West Africa due to its high market value and customer demand. High tuber quality with yield and disease resistance are the main traits for acceptability of yam cultivars across the tropical zone. There has been limited progress in enhancing the production and quality traits of yams, despite the significant socio-economic significance of this crop. To expedite the development of high-quality yam cultivars in Uganda, traits association study was conducted to identify genomic regions associated with key traits such as disease resistance, high yields, and dry matter content. The association mapping was conducted using with multi-random mixed linear model (mrMLM) used to compute the associations using five (5) genetic models. A total of 16 significant single nucleotide polymorphisms (SNPs) markers were identified to be associated with the traits studied. Gene identification analysis revealed the presence of key putative genes such as Vicilin-like seed storage protein At2g28490 (ARATH)and Growth-regulating factor 1 involved in a variety of functions ranging from storage and gene regulation for disease resistance. The results obtained from this work have significant implications for the in-depth analysis of the genetic structure underlying key traits in yam. Additionally, this study emphasizes the identification of SNP variants and genes that may be utilized for genomicinformed selection in order to enhance yield and disease resistance in yams.

    Keywords: Dioscorea rotundata, Uganda, DArTseq, Marker-trait association, gene annotation, Mapping, Formatted: Font: 12 pt Formatted: Font: 12 pt Formatted: Font: 12 pt Formatted: Font: 12 pt

    Received: 04 Jan 2024; Accepted: 09 Sep 2024.

    Copyright: © 2024 ADJEI, Odong, Esuma, Bhattacharjee, AGRE, Adebola, Chamba, Asfaw, Dramadri, Mbabazi, Edema, Ozimati, Ochwo-Ssemakula and Alicai. 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: Paterne A. AGRE, International Institute of Tropical Agriculture (IITA), Ibadan, PMB 5320, Nigeria

    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.