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

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