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Interspecific common bean population derived from Phaseolus acutifolius using a bridging genotype demonstrate useful adaptation to heat tolerance

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Title Interspecific common bean population derived from Phaseolus acutifolius using a bridging genotype demonstrate useful adaptation to heat tolerance
 
Creator Cruz, Sergio
Lobatón, Juan
Urban, Milan O.
Ariza-Suárez, Daniel
Raatz, Bodo
Aparicio, Johan
Mosquera, Gloria
Beebe, Stephen
 
Subject common beans
interspecific hybridization
yields
phaseolus acutifolius
heat tolerance
introgression
 
Description Common bean ( Phaseolus vulgaris L.) is an important legume crop worldwide and is a major nutrient source in the tropics. Common bean reproductive development is strongly affected by heat stress, particularly overnight temperatures above 20°C. The desert Tepary bean ( Phaseolus acutifolius A. Gray) offers a promising source of adaptative genes due to its natural acclimation to arid conditions. Hybridization between both species is challenging, requiring in vitro embryo rescue and multiple backcrossing cycles to restore fertility. This labor-intensive process constrains developing mapping populations necessary for studying heat tolerance. Here we show the development of an interspecific mapping population using a novel technique based on a bridging genotype derived from P. vulgaris , P. Acutifolius and P. parvifolius named VAP1 and is compatible with both common and tepary bean. The population was based on two wild P. acutifolius accessions, repeatedly crossed with Mesoamerican elite common bush bean breeding lines. The population was genotyped through genotyping-by-sequencing and evaluated for heat tolerance by genome-wide association studies. We found that the population harbored 59.8% introgressions from wild tepary, but also genetic regions from Phaseolus parvifolius , a relative represented in some early bridging crosses. We found 27 significative quantitative trait loci, nine located inside tepary introgressed segments exhibiting allelic effects that reduced seed weight, and increased the number of empty pods, seeds per pod, stem production and yield under high temperature conditions. Our results demonstrate that the bridging genotype VAP1 can intercross common bean with tepary bean and positively influence the physiology of derived interspecific lines, which displayed useful variance for heat tolerance.
 
Date 2023-05-12
2023-11-02T09:17:09Z
2023-11-02T09:17:09Z
 
Type Journal Article
 
Identifier Cruz, S.; Lobatón, J.; Urban, M.O.; Ariza-Suárez, D.; Raatz, B.; Aparicio, J.; Mosquera, G.; Beebe, S. (2023) Interspecific common bean population derived from Phaseolus acutifolius using a bridging genotype demonstrate useful adaptation to heat tolerance. Frontiers in Plant Science 14: 1145858. ISSN: 1664-462X
1664-462X
https://hdl.handle.net/10568/132661
https://doi.org/10.3389/fpls.2023.1145858
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 1145858
application/pdf
 
Publisher Frontiers Media
 
Source Frontiers in Plant Science