A wide distribution of this species was found, with the occurrence of D. The majority of interviewers were men, married, with children, using retirement benefits and agriculture as income and family labour as the main support in the yam cultivation. Semi-structured interviews were conducted to collect socio-economic, use, management and diversity data for this crop. A total of 63 farmers were visited in different municipalities and communities in four regions in the country: South, Southeast, Northeast and Midwest. The aim of this study was to provide an overview of the cultivation and distribution of Dioscorea alata in different Brazilian regions. Despite its importance as a pharmacological and food source, there is a lack of studies describing how and where this tuber is grown in Brazil. Widely spread in the tropics, yams were introduced into Brazil during the colonial period and are currently grown throughout the country. Siqueira, M V B M Nascimento, W F Silva, L R G Ferreira, A B Silva, E F Ming, L C Veasey, E A PMID:28355293ĭistribution, management and diversity of yam local varieties in Brazil: a study on Dioscorea alata L. alata genetic resources in breeding programs across different regions and for improving germplasm conservation methods. These results will be very useful for rationalizing D. STRUCTURE revealed the existence of six populations in the diploid genetic pool and a few admixed cultivars. Seventeen major groups of genetically close cultivars have been identified, including eleven groups of diploid cultivars, four groups of triploids and two groups of tetraploids. Our results revealed the existence of a wide genetic diversity and a significant structuring associated with geographic origin, ploidy levels and morpho-agronomic characteristics. Diversity structuration was assessed via Principal Coordinate Analysis, UPGMA analysis and the Bayesian approach implemented in STRUCTURE. alata genetic diversity by genotyping 384 accessions from different geographical regions (South Pacific, Asia, Africa and the Caribbean), using 24 microsatellite markers. The objective of this study was to contribute to the understanding of D. As a consequence, breeding efforts for resistance to its main disease, anthracnose, have been fairly limited. Despite its economic and cultural importance, very little is known about its origin, diversity and genetics. Dioscorea alata, also known as greater yam, is one of the major cultivated species and most widely distributed throughout the tropics. Yams ( Dioscorea sp.) are staple food crops for millions of people in tropical and subtropical regions. Understanding the genetic diversity and population structure of yam ( Dioscorea alata L.) using microsatellite markersĪrnau, Gemma MN, Sheela Chair, Hana Lebot, Vincent K, Abraham Perrier, Xavier Petro, Dalila Penet, Laurent Pavis, Claudie
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