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041			_aEn
044			_aCIV
090			_bDG/A/1476
100			_aKOUAKOU, Amani Michel
100			_aEHOUNOU, Adou Emmanuel
100			_aARNAU, Gemma
100			_aDESFONTAINES, Lucienne
100			_aMARIE-MAGDELEINE, Carine
100			_aLEINSTER, Jocelyne
100			_aNUDOL, Elie
100			_aMALEDONB, Erick
100			_aCHAIRA, Hana
110			_aCentre National de Recherche Agronomique
110			_bCote d'Ivoire
242			_aLocus de caracteres quantitatifs et genes candidats pour les caracteres physico-chimiques lies a la qualite des tubercules chez l'igname ( Dioscorea alata L.)
245			_aQuantitative trait loci and candidate genes for physico-chemical traits related to tuber quality in greater yam (Dioscorea alata L.)
260			_aBouake
260			_bWiley Online Library
260			_cJuil 2023
302			_a8 p.
362			_a2023-07-04
388			_a2023-08-14
520			_aStarch, dry matter content (DMC), proteins, and sugars are among the major influences on yam tuber quality. Genetic improvement programs need simple, rapid, and low-cost tools to screen large populations. The objectives of this work were, using a quantitative trait loci mapping approach (QTL) on two diploid full-sib segregating populations, (i) to acquire knowledge about the genetic control of these traits; (ii) to identify markers linked to the genomic regions controlling each trait, which are useful for marker-assisted selection (MAS); (iii) to validate the QTLs on a diversity panel; and (iv) to identify candidate genes from the validated QTLs. RESULTS: Heritability for all traits was moderately high to high. Significant correlations were observed between traits. A total of 25 QTLs were identified, including six for DMC, six for sugars, six for proteins, and seven for starch. The phenotypic variance explained by individual QTLs ranged from 14.3% to 28.6%. The majority of QTLs were validated on a diversity panel, showing that they are not specific to the genetic background of the progenitors. The approximate physical location of validated QTLs allowed the identification of candidate genes for all studied traits. Those detected for starch content were mainly enzymes involved in starch and sucrose metabolism, whereas those detected for sugars were mainly involved in respiration and glycolysis. CONCLUSION: The validated QTLs will be useful for breeding programs using MAS to improve the quality of yam tubers. The putative genes should be useful in providing a better understanding of the physiological and molecular basis of these important tuber quality traits.
650			_2AGROVOC _gTeneur en matiere seche
650			_gBiosynthese de l'amidon
650			_gSelection moleculaire
650			_gHeritabilite
856			_uhttps://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/jsfa.12822?download=true
999			_c5071 _d5071