Prospecting Collection and Ethnobotanical Studies of  Traditional Rice Varieties in Guinea

Barry, Mamadou Laho; Nanema, Kiswendsida Romaric; Tiendrébéogo, Kouka Fidèle; Sawadogo, Nerbéwendé; Ouédraogo, M.; Barry, Mamadou; Kando, Pauline Bationo; Sawadogo, Mahamadou

doi:10.20546/ijcmas.2019.812.105

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“…QTLs associated with toxicity tolerance have already been identified in several studies offering prospects for marker-assisted selection (Matthus et al, 2015;Nugraha et al, 2016). Recent prospecting and collection of materials in areas of high iron toxicity has resulted in the collection of 90 traditional rice accessions (Barry et al, 2019b). An evaluation of this local material by integrating tolerant or resistant control varieties would make it possible to select local cultivars that are more adapted and tolerant to iron toxicity.…”

Section: Introductionmentioning

confidence: 99%

Assessment of genetic diversity of local rice accessions cultivated in Guinea revealed by SNPs markers, and identification of markers associated with tolerance to iron toxicity

Barry¹,

Sawadogo²,

Ouédraogo³

et al. 2022

Afr. J. Biotechnol.

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Rice is the staple food in the Republic of Guinea. However, its production is seriously hampered by iron toxicity. The fight against this stress necessarily involves the search for tolerant or resistant varieties. The study aims to determine quantitative trait locus (QTL) associated with tolerance to iron toxicity and to identify genotypes tolerant or resistant to iron toxicity. Thus, 90 local rice accessions collected in two regions of Guinea with high iron toxicity were evaluated using 33,537 single nucleotide polymorphism (SNP) markers. Seventy of the SNP markers expressed a polymorphism rate of 100%. Diversity analysis of the entire collection with these markers revealed a total of 140 alleles, a moderate Nei genetic diversity of 0.426, a fairly high Shannon diversity index of 0.610 and an organization of the accessions into four genetic groups. The study also identified 12 potentially iron-tolerant accessions and five QTLs associated with iron-toxicity tolerance located on chromosomes 1, 2, 3, 11, and 12. The 12 genotypes identified could be exploited in the lowland rice breeding program.

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Section: Introductionmentioning

confidence: 99%