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Breeding tepary bean ( Phaseolus acutifolius ) for drought adaptation: A review
Author(s) -
Mwale Saul Eric,
Shimelis Hussein,
Mafongoya Paramu,
Mashilo Jacob
Publication year - 2020
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12806
Subject(s) - biology , phaseolus , abiotic stress , agronomy , marker assisted selection , gene pool , cultivar , abiotic component , drought tolerance , adaptation (eye) , molecular breeding , selection (genetic algorithm) , microbiology and biotechnology , genotype , genetic diversity , gene , genetics , population , demography , neuroscience , artificial intelligence , paleontology , sociology , computer science
Tepary bean ( Phaseolus acutifolius A. Gray ) is a relatively higher drought‐tolerant crop than common bean ( P. vulgaris ), serving as genetic resource for food and genetic enhancement of related legumes. Tepary bean production is hampered by cultivation of low yielding and abiotic stress‐susceptible cultivars. Targeted selection of agronomic, physiological and biochemical traits that maximizes yield gains using Phaseolus gene pool is useful to develop stress‐tolerant and high‐performing genotypes. The objective of this review is to provide breeding progress made regarding tepary bean improvement for drought adaptation. Agronomic, physiological and biochemical traits utilized for selection of drought‐tolerant genotypes are highlighted. Genetic and genomic resources developed for tepary bean or closely related species such as common bean useful for genetic analysis and breeding are discussed. Opportunities and challenges to facilitate breeding of tepary bean genotypes with improved abiotic stress adaptation are highlighted. This will enable development of drought‐tolerant tepary bean genotypes targeting selection of agronomic, physiological and biochemical traits. Use of genetically related and complementary Phaseolus species and marker‐assisted selection method is key to developing drought‐tolerant genotypes.