Multivariate genomic analysis and optimal contributions selection predicts high genetic gains in cooking time, iron, zinc, and grain yield in common beans in East Africa

Title
Multivariate genomic analysis and optimal contributions selection predicts high genetic gains in cooking time, iron, zinc, and grain yield in common beans in East Africa
Publication Date
2021-11
Author(s)
Saradadevi, Renu
Mukankusi, Clare
Li, Li
( author )
OrcID: https://orcid.org/0000-0002-3601-9729
Email: lli4@une.edu.au
UNE Id une-id:lli4
Amongi, Winnyfred
Mbiu, Julius Peter
Raatz, Bodo
Ariza, Daniel
Beebe, Steve
Varshney, Rajeev K
Huttner, Eric
Kinghorn, Brian
( author )
OrcID: https://orcid.org/0000-0002-3778-7615
Email: bkinghor@une.edu.au
UNE Id une-id:bkinghor
Banks, Robert
( author )
OrcID: https://orcid.org/0000-0001-7303-033X
Email: rbanks@une.edu.au
UNE Id une-id:rbanks
Rubyogo, Jean Claude
Siddique, Kadambot H M
Cowling, Wallace A
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
John Wiley & Sons Ltd
Place of publication
United Kingdom
DOI
10.1002/tpg2.20156
UNE publication id
une:1959.11/51601
Abstract

Common bean (Phaseolus vulgaris L.) is important in African diets for protein, iron (Fe), and zinc (Zn), but traditional cultivars have long cooking time (CKT), which increases the time, energy, and health costs of cooking. Genomic selection was used to predict genomic estimated breeding values (GEBV) for grain yield (GY), CKT, Fe, and Zn in an African bean panel of 358 genotypes in a two-stage analysis. In Stage 1, best linear unbiased estimates (BLUE) for each trait were obtained from 898 genotypes across 33 field trials in East Africa. In Stage 2, BLUE in a training population of 141 genotypes were used in a multivariate genomic analysis with genome-wide single nucleotide polymorphism data from the African bean panel. Moderate to high genomic heritability was found for GY (0.45 ± 0.10), CKT (0.50 ± 0.15), Fe (0.57 ± 0.12), and Zn (0.61 ± 0.13). There were significant favorable genetic correlations between Fe and Zn (0.91 ± 0.06), GY and Fe (0.66 ± 0.17), GY and Zn (0.44 ± 0.19), CKT and Fe (-0.57 ± 0.21), and CKT and Zn (-0.67 ± 0.20). Optimal contributions selection (OCS), based on economic index of weighted GEBV for each trait, was used to design crossing within four market groups relevant to East Africa. Progeny were predicted by OCS to increase in mean GY by 12.4%, decrease in mean CKT by 9.3%, and increase in mean Fe and Zn content by 6.9 and 4.6%, respectively, with low achieved coancestry of 0.032. Genomic selection with OCS will accelerate breeding of high-yielding, biofortified, and rapid cooking African common bean cultivars.

Link
Citation
Plant Genome, 14(3), p. 1-16
ISSN
1940-3372
Pubmed ID
34704366
Start page
1
End page
16
Rights
Attribution 4.0 International

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