Spatially structured genetic diversity of the Amerindian yam (Dioscorea trifida L.) assessed by SSR and ISSR markers in Southern Brazil

Nascimento, Wellington Ferreira do; Rodrigues, Jucelene Fernandes; Koehler, Samantha; Gepts, Paul; Veasey, Elizabeth Ann

doi:10.1007/s10722-013-0008-y

Cited by 27 publications

(26 citation statements)

References 46 publications

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“…This may indicate that genetic exchange between the distant regions has probably occurred. This is consistent with the results of Nascimento et al (2013), who observed only a low correlation between the genetic and geographical distances, which indicates the anthropogenic interference in the distribution of genetic variability of the species.…”

Section: Resultssupporting

confidence: 92%

“…The Munsell color charts for plant tissues (Munsell Color, 1977) were used to assess differences in the tuber pulp pigmentation. An optimal set of descriptors that show best the unique characteristics of each landrace was used to create the identification key for the assessed landraces.…”

Section: Methodsmentioning

confidence: 99%

“…D. trifida is an herbaceous, climbing, perennial, dioecious, and allogamous plant, with a high intraspecific genetic diversity (Nascimento et al, 2013). There is evidence that its center of origin is the Amazon, where it shows autotetraploidy in the cultivated form, and tri-or diploidy in the wild form (Bousalem et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…There has been a considerable effort to assess morphological descriptors of some other Dioscorea, except for D. trifida (Rhodes & Martin, 1972;Onyilagha, 1986;Dansi et al, 1999;Islam et al, 2011). The only report for D. trifida is that of Nascimento et al (2013), who used 12 morphological traits to described fifty-one accessions of D. trifida from the states of São Paulo, Santa Catarina, and Mato Grosso, and included only two accessions acquired at fairs in the Amazonas state. Neither list of descriptors nor identification key is available to describe D. trifida accessions.…”

Section: Introductionmentioning

confidence: 99%

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Morphological diversity and identification key for landraces of the Amerindian yam in central Amazon

Beyerlein

Pereira

2018

Pesq. agropec. bras.

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-The objective of this work was to select an optimal set of morphological descriptors, in order to characterize the phenotipical diversity of Amerindian yam (Dioscorea trifida) landraces cultivated in the municipality of Caapiranga, in the central Amazon region of Brazil, and to develop a botanical identification key for them. A collection of 140 accessions and an experimental plot with a representative sample of 20 landraces were used to test 64 morphological descriptors for the aerial and subterranean plant parts. Fortyeight descriptors were selected, of which 13 were for tubers, 12 for stems, 14 for leaves, and 9 for inflorescences and seed. A cluster analysis based on the morphological data showed the formation of two landrace groups with greater similarity: white and purple pulp tubers. The results provide tools for in situ and ex situ conservation and for plant breeding programs, considering the importance of maintaining and recognizing the value of Ameridian yam as an important native genetic resource for food security in the region.

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Section: Resultssupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological diversity and identification key for landraces of the Amerindian yam in central Amazon

Beyerlein

Pereira

2018

Pesq. agropec. bras.

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“…Several SSR primers have been developed and used to assess the genetic diversity and structure of yam species, such as cultivated D. alata (Tostain et al, 2006;Sartie et al, 2012;Siqueira et al, 2011Siqueira et al, , 2014, D. trifida (Hochu et al, 2006;Nascimento et al, 2013), and D. cayenensis/D. rotundata (Tostain et al, 2007;Obidiegwu et al, 2009b;Sartie et al, 2012;Scarcelli et al, 2005Scarcelli et al, , 2013Mengesha et al, 2013;Silva et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity among air yam (Dioscorea bulbifera) varieties based on single sequence repeat markers

Silva¹,

Siqueira²,

Carrasco³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Dioscorea is the largest genus in the Dioscoreaceae family, and includes a number of economically important species including the air yam, D. bulbifera L. This study aimed to develop new single sequence repeat primers and characterize the genetic diversity of local varieties that originated in several municipalities of Brazil. We developed an enriched genomic library for D. bulbifera resulting in seven primers, six of which were polymorphic, and added four polymorphic loci developed for other Dioscorea species. This resulted in 10 polymorphic primers to evaluate 42 air yam accessions. Thirtythree alleles (bands) were found, with an average of 3.3 alleles per locus. The discrimination power ranged from 0.113 to 0.834, with an average of 0.595. Both principal coordinate and cluster analyses (using the Jaccard Index) failed to clearly separate the accessions according to their origins. However, the 13 accessions from Conceição dos Ouros, Minas Gerais State were clustered above zero on the principal coordinate 2 axis, and were also clustered into one subgroup in the cluster analysis. Accessions from Ubatuba, São Paulo State were clustered below zero on the same principal coordinate 2 axis, except for one accession, although they were scattered in several subgroups in the cluster analysis. Therefore, we found little spatial structure in the accessions, although those from Conceição dos Ouros and Ubatuba exhibited some spatial structure, and that there is a considerable level of genetic diversity in D. bulbifera maintained by traditional farmers in Brazil.

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Cultivation and Utilization of Diosgenin-Contained Dioscorea Species

Nascimento

Siqueira

Silva

et al. 2021

Sustainable Development and Biodiversity

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Spatially structured genetic diversity of the Amerindian yam (Dioscorea trifida L.) assessed by SSR and ISSR markers in Southern Brazil

Cited by 27 publications

References 46 publications

Morphological diversity and identification key for landraces of the Amerindian yam in central Amazon

Morphological diversity and identification key for landraces of the Amerindian yam in central Amazon

Genetic diversity among air yam (Dioscorea bulbifera) varieties based on single sequence repeat markers

Cultivation and Utilization of Diosgenin-Contained Dioscorea Species

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