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Robustness and strategies of adaptation among farmer varieties of African Rice (Oryza glaberrima) and Asian Rice (Oryza sativa) across West Africa.

Mokuwa A, Nuijten E, Okry F, Teeken B, Maat H, Richards P, Struik PC - PLoS ONE (2013)

Bottom Line: This study offers evidence of the robustness of farmer rice varieties (Oryza glaberrima and O. sativa) in West Africa.The results contradict the rather common belief that farmer varieties are only of local value.Farmer varieties should be considered by breeding programmes and used (alongside improved varieties) in dissemination projects for rural food security.

View Article: PubMed Central - PubMed

Affiliation: Technology and Agrarian Development group, Wageningen University, Wageningen, The Netherlands.

ABSTRACT
This study offers evidence of the robustness of farmer rice varieties (Oryza glaberrima and O. sativa) in West Africa. Our experiments in five West African countries showed that farmer varieties were tolerant of sub-optimal conditions, but employed a range of strategies to cope with stress. Varieties belonging to the species Oryza glaberrima - solely the product of farmer agency - were the most successful in adapting to a range of adverse conditions. Some of the farmer selections from within the indica and japonica subspecies of O. sativa also performed well in a range of conditions, but other farmer selections from within these two subspecies were mainly limited to more specific niches. The results contradict the rather common belief that farmer varieties are only of local value. Farmer varieties should be considered by breeding programmes and used (alongside improved varieties) in dissemination projects for rural food security.

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Related in: MedlinePlus

Box plots for accumulated canopy cover(A; %.days) of 26 varieties in three experimental sites: Ghana (1); Togo (4) and Guinea (5). See materials and methods section for coding of the botanical groups and molecular clusters.
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pone-0034801-g002: Box plots for accumulated canopy cover(A; %.days) of 26 varieties in three experimental sites: Ghana (1); Togo (4) and Guinea (5). See materials and methods section for coding of the botanical groups and molecular clusters.

Mentions: Of the indica group, it was only in the Ind_Gc cluster that significant sowing × location interactions were found for Vmax and A. The indica group showed a significant location effect for A. No significant effects were found for the Ind_Gh cluster. This indicates that the Ind_Gh maintained better Vmax and A than the Ind_Gc but often failed to yield (Figures 2 and 3).


Robustness and strategies of adaptation among farmer varieties of African Rice (Oryza glaberrima) and Asian Rice (Oryza sativa) across West Africa.

Mokuwa A, Nuijten E, Okry F, Teeken B, Maat H, Richards P, Struik PC - PLoS ONE (2013)

Box plots for accumulated canopy cover(A; %.days) of 26 varieties in three experimental sites: Ghana (1); Togo (4) and Guinea (5). See materials and methods section for coding of the botanical groups and molecular clusters.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3585979&req=5

pone-0034801-g002: Box plots for accumulated canopy cover(A; %.days) of 26 varieties in three experimental sites: Ghana (1); Togo (4) and Guinea (5). See materials and methods section for coding of the botanical groups and molecular clusters.
Mentions: Of the indica group, it was only in the Ind_Gc cluster that significant sowing × location interactions were found for Vmax and A. The indica group showed a significant location effect for A. No significant effects were found for the Ind_Gh cluster. This indicates that the Ind_Gh maintained better Vmax and A than the Ind_Gc but often failed to yield (Figures 2 and 3).

Bottom Line: This study offers evidence of the robustness of farmer rice varieties (Oryza glaberrima and O. sativa) in West Africa.The results contradict the rather common belief that farmer varieties are only of local value.Farmer varieties should be considered by breeding programmes and used (alongside improved varieties) in dissemination projects for rural food security.

View Article: PubMed Central - PubMed

Affiliation: Technology and Agrarian Development group, Wageningen University, Wageningen, The Netherlands.

ABSTRACT
This study offers evidence of the robustness of farmer rice varieties (Oryza glaberrima and O. sativa) in West Africa. Our experiments in five West African countries showed that farmer varieties were tolerant of sub-optimal conditions, but employed a range of strategies to cope with stress. Varieties belonging to the species Oryza glaberrima - solely the product of farmer agency - were the most successful in adapting to a range of adverse conditions. Some of the farmer selections from within the indica and japonica subspecies of O. sativa also performed well in a range of conditions, but other farmer selections from within these two subspecies were mainly limited to more specific niches. The results contradict the rather common belief that farmer varieties are only of local value. Farmer varieties should be considered by breeding programmes and used (alongside improved varieties) in dissemination projects for rural food security.

Show MeSH
Related in: MedlinePlus