Assessment of genetic variability in a traditional cassava (Manihot esculenta Cratz) farming system, using AFLP markers

Article Abstract:

Genetic variability has been studied in a traditional Guyana Makushi Amerindian cassava (Manihot esculenta Cratz) farming system in 31 cassava varieties, through use of AFLP markers. Local varieties were seen to be an important source of genetic diversity. Results show the importance of the interaction of human and ecological factors in the dynamics of the diversity and are consistent the hypothesis of a limited domestication event in a restricted area, with rapid later diffusion of cultivated phenotypes and convergent evolution.

France, Guyana, Management, Tropics, Farms, Small, Small farms

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Genetic diversity and differentiation of Taxodium in the south-eastern United States using cleaved amplified polymorphic sequences

Article Abstract:

Genetic diversity of Taxodium in the south-eastern United States is discussed based on study of differentiation using cleaved amplified polymorphic sequences (CAPS). The two taxa, bald cypress and pond cypress, are found in the area in overlapping ranges. Habitats seem to be different. Most of the genetic variation was found within populations with 4.9% between populations and 3.2% between taxa. The two taxa apparently should be considered varietals.

South Atlantic States, Analysis, Usage, DNA, Identification and classification, Cladistic analysis, Botany, Plant population genetics, Plant taxonomy, Cypress, South Atlantic States (United States)

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Epistasis in the Expression of Relevant Traits in Cassava (Manihot esculenta Crantz) for Subhumid Conditions

Article Abstract:

Research on cassava shows how root yield and other complex traits are governed by dominance, with epistasis key in explicating quantitative genetics models used for explicating phenotypic variation in these traits. Implications for further research in crop genetics are also discussed.

Science & research, All Other Miscellaneous Crop Farming, Field crops, except cash grains, not elsewhere classified, Cassava, Biological models, Genetic research, Genetic epistasis, Epistasis

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