Population structure and genetic diversity of wild Helianthus species from Mozambique

Ribeiro, A.; Gouveia, M.; Bessa, A.; Ferreira, A.; Magumisse, A. T.; Manjate, M.; Faria, T.

http://hdl.handle.net/10400.13/5296

Use this identifier to reference this record.

Name:	Description:	Size:	Format:
Population Structure and Genetic Diversity.pdf		277.73 KB	Adobe PDF	Download

Send Feedback

Authors

Abstract(s)

The production of sunflower suffered a major decline in Mozambique after its independence in 1975. Civil war, human activities and environmental damage subjected the species to an ecological stress con tributing to reduce the number and size of wild populations. As this reduction is often related to a loss of genetic variation we estimated the genetic diversity within and among populations of wild Helianthus from five districts of Mozambique using RAPD markers. The 44 accessions studied grouped into four major clusters exhibiting structured variability with regard to geographic origin. A high level of genetic diversity (He = 0.350 and I = 0.527) was retained at the population level. The genetic variation among populations was high (59.7%), which is consistent with low gene flow (Nm = 0.338). The proportion of total genetic diversity resid ing among these populations should be kept in mind to devise different conservation strategies in order to pre serve these populations. Currently wild Helianthus genetic resources present in Maputo and Sofala are on the edge of extinction mainly due to excessive urbanization. Therefore, conservation of what remains of this plant genetic diversity is essential for sustainable utilization and can be useful for breeding programs.

Keywords

RAPD marker Genetic diversity Total genetic diversity Wild accession Southeast coast Urban ization Helianthus species Mozambique . Faculdade de Ciências da Vida

URI

http://hdl.handle.net/10400.13/5296

Citation

Ribeiro, A., Gouveia, M., Bessa, A., Ferreira, A., Magumisse, A. T., Manjate, M., & Faria, T. (2010). Population structure and genetic diversity of wild Helianthus species from Mozambique. Russian journal of genetics, 46, 967-975.