Identification of quantitative trait loci for drought tolerance in Bukoba/Kijivu Andean mapping population of common bean.

Autor: Hamabwe SM; Department of Biology, School of Science and Technology, University of Nairobi, Nairobi, Kenya.; Department of Plant Science, University of Zambia, Great East Road, Lusaka, Zambia., Otieno NA; Department of Biology, School of Science and Technology, University of Nairobi, Nairobi, Kenya., Soler-Garzón A; Grain Legume Genetics and Physiology Research Unit, United States Department of Agriculture-Agricultural Research Service, Prosser, WA, USA., Miklas PN; Grain Legume Genetics and Physiology Research Unit, United States Department of Agriculture-Agricultural Research Service, Prosser, WA, USA., Parker T; Department of Plant Sciences/MS1, Section of Crop and Ecosystem Sciences, University of California, 1 Shields Avenue, Davis, CA, 95616-8780, USA., Kramer DM; MSU-DOE Plant Research Lab, Michigan State University, East Lansing, MI, 48824, USA., Chattopadhyay A; MSU-DOE Plant Research Lab, Michigan State University, East Lansing, MI, 48824, USA., Cheelo P; Department of Plant Science, University of Zambia, Great East Road, Lusaka, Zambia., Kuwabo K; Department of Plant Science, University of Zambia, Great East Road, Lusaka, Zambia., Kamfwa K; Department of Plant Science, University of Zambia, Great East Road, Lusaka, Zambia. kelvinkamfwa@gmail.com.
Jazyk: angličtina
Zdroj: TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [Theor Appl Genet] 2023 Oct 12; Vol. 136 (11), pp. 222. Date of Electronic Publication: 2023 Oct 12.
DOI: 10.1007/s00122-023-04463-2
Abstrakt: Key Message: Quantitative Trait Loci "hotspots" for drought tolerance were identified on chromosomes Pv06, Pv07 and Pv10 of common bean. Drought is a major production constraint of common bean (Phaseolus vulgaris L.) worldwide. The objective of this study was to identify the Quantitative Trait Loci (QTL) for drought tolerance in an Andean population of Recombinant Inbred Lines (RILs). A total of 155 F 5:7 RILs derived from a cross between Kijivu (drought tolerant) and Bukoba (drought susceptible) were evaluated for drought tolerance in field and pot experiments. Four field experiments were conducted at three locations in Zambia in 2020 and 2021. All field trials were conducted in the dry season under irrigation. The 155 RILs were genotyped with 11,292 SNPs, and composite interval mapping was conducted to identify QTL for drought tolerance. Seed yield for Kijivu under drought stress was consistently higher than for Bukoba across all four field trials. A total of 60 QTL were identified for morphological, agronomic, and physiological traits under drought stress and non-stress conditions. However, the majority of these QTL were specific to drought stress. QTL "hotspots" for drought tolerance were identified on chromosomes Pv06, Pv07, and Pv10. Extensive co-localizations for agronomic and morpho-physiological traits under drought stress were observed at the three drought-tolerance QTL hotspots. Additionally, these three QTL hotspots overlapped with previously identified QTL for drought tolerance, while several others identified QTL are novel. The three identified QTL hotspots could be used in future marker-assisted selection for drought tolerance in common bean.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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