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dc.contributor.authorIseki, K.
dc.contributor.authorMatsumoto, R.
dc.contributor.authorOlaleye, O.
dc.contributor.authorShimizu, M.
dc.contributor.authorAsfaw, A.
dc.date.accessioned2022-10-31T08:48:07Z
dc.date.available2022-10-31T08:48:07Z
dc.date.issued2022-04-25
dc.identifier.citationIseki, K., Matsumoto, R., Olaleye, O., Shimizu, M. & Asfaw, A. (2022). Variability of flowering sex and its effect on agronomic trait expression in white guinea yam. Frontiers in Plant Science, 13: 837951, 1-12.
dc.identifier.issn1664-462X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7917
dc.description.abstractWhite Guinea yam (Dioscorea rotundata) is mainly a dioecious tuberous crop that produces flowers of varying sex phenotypes. Agronomic traits in Guinea yam differ according to the sex phenotype, but the precise interaction between the traits and sex phenotype is not clearly understood. This might be due to the high heterozygosity of yam where cultivars with different flowering sex have different genetic backgrounds, which mask the sole effect of sex phenotype on the agronomic traits. This study used F1-derived clonal progenies from a bi-parental cross to minimize the impact of different genetic backgrounds among the plants with different sex phenotypes. The impact of plant sex on agronomic traits, specifically tuber yield, was evaluated through field trials conducted for four years. The results showed that only plants with a female genotype exhibited varying sex phenotypes even within the clones of same accession grown in the same experimental field. The significant effects of sex genotype and phenotype on agronomic traits were detected. Our results revealed that the flowering date was delayed in the plants with female genotypes compared to male genotypes, even when compared only among the plants with male phenotypes. The flowering date is the most important reason for the sexual differences in tuber yield. A high tuber yield was obtained when plants with the female phenotype flowered before tuber enlargement. This result can be attributed to the fact that the low flowering intensity in female plants increases the availability of carbon resources for leaf development. Female plants also showed a large negative effect of late flowering on tuber yield owing to resource competition between flowering and tuber enlargement. These findings demonstrate the feasibility of yield improvement by controlling the flowering time, with a higher effectiveness achieved in female than in male plants.
dc.description.sponsorshipJapanese Ministry of Agriculture, Forestry, and Fisheries
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-12
dc.language.isoen
dc.subjectDioscorea Rotundata
dc.subjectFlowering
dc.subjectYields
dc.subjectWhite Guinea Yam
dc.subjectPhenotypes
dc.subjectGenotypes
dc.subjectAgronomic Characters
dc.titleVariability of flowering sex and its effect on agronomic trait expression in white guinea yam
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationJapan International Research Center for Agricultural Sciences
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationIwate Biotechnology Research Center
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidISEKI:2022
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.iitasubjectYam
cg.journalFrontiers in Plant Science
cg.notesPublished online: 25 Apr 2022
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.3389/fpls.2022.837951
cg.iitaauthor.identifierRyo Matsumoto: 0000-0002-0106-6728
cg.iitaauthor.identifierAsrat Asfaw: 0000-0002-4859-0631
cg.futureupdate.requiredNo
cg.identifier.volume13


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