@article{fdi:010042659,
  title = {{D}iachronic (1979-2003) analysis of rice genetic diversity in {G}uinea did not reveal genetic erosion},
  author = {{B}arry, {M}. {B}. and {P}ham, {J}ean-{L}ouis and {B}eavogui, {S}. and {G}hesqui{\`e}re, {A}lain and {A}hmadi, {N}.},
  editor = {},
  language = {{ENG}},
  abstract = {{G}reater insight into the dynamics of genetic resources of crop plants is needed in order to pinpoint detrimental evolutionary patterns and draw up conservation priorities. {T}emporal evolution of rice genetic diversity was monitored in {M}aritime {G}uinea where subsistence-oriented agriculture prevails. {D}iachronic comparison was performed between samples collected in six villages during the 1979/1982-period and in 2003, based on the names and number of varieties inventoried and the polymorphism of microsatellite markers. {T}he number of varieties appeared not to be comparable between the two dates, due to differences in the collection methods. {T}he varietal composition had evolved very substantially between the two collection dates. {M}any long-duration varieties present in 1979/1982 had been abandoned and several improved varieties had been introduced. {T}he mean number of alleles per locus and per accession was significantly higher in accessions collected in 2003. {P}airwise comparisons of the mean number of alleles per locus in 1979/1982-2003 homonymous accession pairs indicated higher intra-accession diversity for the 2003 collections. {G}enetic differentiation, measured with the {F} ({ST}) values, was very high and significant for more than 80% of these pairs of accessions. {T}he overall genetic differentiation between accessions from the two collections dates was also significant. {S}ignificant changes were also observed for allelic composition. {H}owever, alleles specific of each collection date had much lower frequency, compared to alleles common to the two collection dates. {T}hese results suggest that rice genetic diversity in {M}aritime {G}uinea has been maintained or even enhanced. {O}ld collections of crop genetic resources are often not exhaustive enough to undertake perfect diachronic comparison. {N}ew methods to utilize this historical data for diversity monitoring are needed.},
  keywords = {{D}iversity ; {E}rosion ; {G}enetic resources ; {G}uinea ; {O}ryza ; {R}ice},
  booktitle = {},
  journal = {{G}enetic {R}esources and {C}rop {E}volution},
  volume = {55},
  numero = {5},
  pages = {723--733},
  ISSN = {0925-9864},
  year = {2008},
  DOI = {10.1007/s10722-007-9280-z},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042659},
}