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Genetic Correlation Between Fe and Zn Biofortification and Yield Components in a Common Bean (Phaseolus vulgaris L.).
Diaz, Santiago; Polania, Jose; Ariza-Suarez, Daniel; Cajiao, Cesar; Grajales, Miguel; Raatz, Bodo; Beebe, Stephen E.
Afiliação
  • Diaz S; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
  • Polania J; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
  • Ariza-Suarez D; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
  • Cajiao C; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
  • Grajales M; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
  • Raatz B; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
  • Beebe SE; Bean Program, Crops for Health and Nutrition Area, Alliance Bioversity International - CIAT, Cali, Colombia.
Front Plant Sci ; 12: 739033, 2021.
Article em En | MEDLINE | ID: mdl-35046970
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Front Plant Sci Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Front Plant Sci Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Suíça