Genetic Diversity of the Greater Yam (Dioscorea alata L.) and Relatedness to D. nummularia Lam. and D. transversa Br. as Revealed with AFLP Markers

@article{Malapa2003GeneticDO,
  title={Genetic Diversity of the Greater Yam (Dioscorea alata L.) and Relatedness to D. nummularia Lam. and D. transversa Br. as Revealed with AFLP Markers},
  author={Roger Malapa and Gemma Arnau and J. L. Noyer and Vincent Lebot},
  journal={Genetic Resources and Crop Evolution},
  year={2003},
  volume={52},
  pages={919-929}
}
Amplified fragment length polymorphism markers were used to assess the genetic relatedness between Dioscorea alata and nine other edible Dioscorea. These species include D. abyssinica Hoch., D. bulbifera L., D. cayenensis-rotundata Lamk. et Poir., D. esculenta Burk., D. nummularia Lam., D. pentaphylla L., D. persimilis Prain. et Burk., D. transversa Br. and D. trifida L. Four successive studies were conducted with emphasis on the genetic relationship within D. alata and among species of the… 

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References

SHOWING 1-10 OF 34 REFERENCES

Ploidy determination of some yam species (Dioscorea spp.) by flow cytometry and conventional chromosomes counting

The results lead to the conclusion that the D. cayenensis-rotundata cultigens and the wild species analysed in this study may belong to the same gene pool.

A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance

QTL mapping revealed one AFLP marker E-14/M52-307 located on linkage group 2 that was associated with anthracnose resistance, explaining 10% of the total phenotypic variance.

Genetic relationships between Dioscorea alata L. cultivars

Dioscorea alata might be a true species and not a putative cultigen as previously reported because of the existing genetic variation is also due to ancient sexual recombinations as demonstrated by the isozyme patterns.

Characterisation of the double genome structure of modern sugarcane cultivars (Saccharum spp.) by molecular cytogenetics

Using comparative genomic DNA in situ hybridization, it is demonstrated that it is possible to distinguish the chromosomes contributed by these two species in an interspecific F1 hybrid and a cultivated clone, R570, and for the first time the occurrence of recombination between the chromosomes of these twospecies.

Biomolecular evidence for plant domestication in Sahul

  • V. Lebot
  • Biology
    Genetic Resources and Crop Evolution
  • 2004
Biomolecular markers reveal that for these crops at least, domestication has occurred in New Guinea and further east in Melanesia, and have obvious bearings on genetic resources programme strategies and future surveys.

Genetic variation and cultivar identification of Jamaican yam germplasm by random amplified polymorphic DNA analysis

A large number of intervarietal and interspecific polymorphisms enabled us to reliably discriminate between all Jamaican cultivars investigated, and RAPD patterns proved to be highly reproducible and somatically stable.

A high-density linkage map of Theobroma cacao L.

A mapping population of 181 progenies resulting from a cross between two heterozygous genotypes, a Forastero and a Trinitario, was used for the linkage analysis and a new DNA isolation protocol was established, which allows enough good quality DNA to construct a genetic map with PCR-based markers.

Mapping of the Dioscorea tokoro genome: AFLP markers linked to sex

Two framework linkage maps were constructed for the genome of the dioecious wild yam species Dioscorea tokoro, and ten AFLP markers heterozygous only in the male parent showed tight linkages with the sex of its progeny, which suggests that male is the heterogametic sex (XY) and the female is the homogametics sex (XX).

Polyploidy and sterility in relation to sex in Dioscorea alata L. (Dioscoreaceae)

Pollination studies revealed that seed sterility in D. alata was due to female sterility associated with the occurrence of higher levels of ploidy, a curious situation among dioecious higher plants.

An Account of the Genus Dioscorea in the East

YAMS must have been one of the foods of primitive man, and in their wild state they still form one of the chief components in the diet of jungle tribes; indeed, in times of failing rainfall and