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Genetic correlation between Fe and Zn biofortification and yield components in a common bean (Phaseolus vulgaris L.)

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Title Genetic correlation between Fe and Zn biofortification and yield components in a common bean (Phaseolus vulgaris L.)
 
Creator Díaz, Santiago
Polania, Jose
Ariza-Suarez, Daniel
Cajiao, Cesar
Grajales, Miguel
Raatz, Bodo
Beebe, Stephen E.
 
Subject quantitative trait loci mapping-qtl mapping
biofortification
beans
zinc
iron
 
Description Common bean (Phaseolus vulgaris L.) is the most important legume for direct human consumption worldwide. It is a rich and relatively inexpensive source of proteins and micronutrients, especially iron and zinc. Bean is a target for biofortification to develop new cultivars with high Fe/Zn levels that help to ameliorate malnutrition mainly in developing countries. A strong negative phenotypic correlation between Fe/Zn concentration and yield is usually reported, posing a significant challenge for breeders. The objective of this study was to investigate the genetic relationship between Fe/Zn. We used Quantitative Trait Loci (QTLs) mapping and Genome-Wide Association Studies (GWAS) analysis in three bi-parental populations that included biofortified parents, identifying genomic regions associated with yield and micromineral accumulation. Significant negative correlations were observed between agronomic traits (pod harvest index, PHI; pod number, PdN; seed number, SdN; 100 seed weight, 100SdW; and seed per pod, Sd/Pd) and micronutrient concentration traits (SdFe and SdZn), especially between pod harvest index (PHI) and SdFe and SdZn. PHI presented a higher correlation with SdN than PdN. Seventy-nine QTLs were identified for the three populations: 14 for SdFe, 12 for SdZn, 13 for PHI, 11 for SdN, 14 for PdN, 6 for 100SdW, and 9 for Sd/Pd. Twenty-three hotspot regions were identified in which several QTLs were co-located, of which 13 hotpots displayed QTL of opposite effect for yield components and Fe/Zn accumulation. In contrast, eight QTLs for SdFe and six QTLs for SdZn were observed that segregated independently of QTL of yield components. The selection of these QTLs will enable enhanced levels of Fe/Zn and will not affect the yield performance of new cultivars focused on biofortification.
 
Date 2022-01-03
2023-04-11T08:35:42Z
2023-04-11T08:35:42Z
 
Type Journal Article
 
Identifier Diaz, S.; Polania, J.; Ariza-Suarez, D.; Cajiao, C.; Grajales, M.; Raatz, B.; Beebe, S.E. (2022) Genetic correlation between Fe and Zn biofortification and yield components in a common bean (Phaseolus vulgaris L.). Frontiers in Plant Science 12:739033. 13 p. ISSN: 1664-462X
1664-462X
https://hdl.handle.net/10568/129943
https://doi.org/10.3389/fpls.2021.739033
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 13 p.
application/pdf
 
Publisher FRONTIERS MEDIA SA
 
Source Frontiers in Plant Science