Effect of drought stress on the genetic architecture of photosynthate allocation and remobilization in pods of common bean (Phaseolus vulgaris L.), a key species for food security

Simple item page
cg.contributor.affiliationInternational Center for Tropical Agriculture
cg.contributor.crpGrain Legumes and Dryland Cereals
cg.creator.identifierIdupulapati M. Rao: 0000-0002-8381-9358
cg.creator.identifierStephen E Beebe: 0000-0002-3742-9930
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.1186/s12870-019-1774-2
cg.isijournalISI Journal
cg.issn1471-2229
cg.issue1
cg.journalBMC Plant Biology
cg.number171
cg.reviewStatusPeer Review
cg.subject.ciatBEANS
cg.volume19
dc.contributor.authorBerny Mier y Teran, Jorge Carlos
dc.contributor.authorKonzen, Enéas R.
dc.contributor.authorPalkovic, Antonia
dc.contributor.authorTsai, Siu Mui
dc.contributor.authorRao, Idupulapati M.
dc.contributor.authorBeebe, Stephen E.
dc.contributor.authorGepts, Paul L.
dc.date.accessioned2019-05-13T20:10:18Zen
dc.date.available2019-05-13T20:10:18Zen
dc.identifier.urihttps://hdl.handle.net/10568/101264
dc.titleEffect of drought stress on the genetic architecture of photosynthate allocation and remobilization in pods of common bean (Phaseolus vulgaris L.), a key species for food securityen
dcterms.abstractBackground Common bean is the most important staple grain legume for direct human consumption and nutrition. It complements major sources of carbohydrates, including cereals, root crop, or plantain, as a source of dietary proteins. It is also a significant source of vitamins and minerals like iron and zinc. To fully play its nutritional role, however, its robustness against stresses needs to be strengthened. Foremost among these is drought, which commonly affects its productivity and seed quality. Previous studies have shown that photosynthate remobilization and partitioning is one of the main mechanisms of drought tolerance and overall productivity in common bean. Results In this study, we sought to determine the inheritance of pod harvest index (PHI), a measure of the partitioning of pod biomass to seed biomass, relative to that of grain yield. We evaluated a recombinant inbred population of the cross of ICA Bunsi and SXB405, both from the Mesoamerican gene pool, to determine the effects of intermittent and terminal drought stresses on the genetic architecture of photosynthate allocation and remobilization in pods of common bean. The population was grown for two seasons, under well-watered conditions and terminal and intermittent drought stress in one year, and well-watered conditions and terminal drought stress in the second year. There was a significant effect of the water regime and year on all the traits, at both the phenotypic and QTL levels. We found nine QTLs for pod harvest index, including a major (17% of variation explained), stable QTL on linkage group Pv07. We also found eight QTLs for yield, three of which clustered with PHI QTLs, underscoring the importance of photosynthate remobilization in productivity. We also found evidence for substantial epistasis, explaining a considerable part of the variation for yield and PHI. Conclusion Our results highlight the genetic relationship between PHI and yield and confirm the role of PHI in selection of both additive and epistatic effects controlling drought tolerance. These results are a key component to strengthen the robustness of common bean against drought stresses.en
dcterms.accessRightsOpen Access
dcterms.available2019-04-30
dcterms.bibliographicCitationBerny Mier y Teran, Jorge C.; Konzen, Enéas R. ; Palkovic, Antonia; Tsai, Siu M.; Rao, Idupulapati M.; Beebe, Stephen & Gepts, Paul (2019). Effect of drought stress on the genetic architecture of photosynthate allocation and remobilization in pods of common bean (Phaseolus vulgaris L.), a key species for food security. BMC Plant Biology. 19:171en
dcterms.extent19:171
dcterms.issued2019-12
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherSpringer
dcterms.subjectphaseolus vulgaris l.en
dcterms.subjectfood securityen
dcterms.subjectdrought stressen
dcterms.subjectcommon beansen
dcterms.subjectgene interactionen
dcterms.subjectinteracción de genesen
dcterms.subjectquantitative trait locien
dcterms.subjectabiotic stressen
dcterms.typeJournal Article

Files

License bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CIAT Articles in Journals
CIAT Agrobiodiversity