Limits...
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.

Show MeSH

Related in: MedlinePlus

Box plots of number of tillers per plant of 26 varieties in five experimental sites: 1: Ghana; 2: Sierra Leone; 3: Guinea Bissau; 4: Togo and 5: Guinea. See materials and methods section for coding of the botanical and molecular clusters.
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3585979&req=5

pone-0034801-g009: Box plots of number of tillers per plant of 26 varieties in five experimental sites: 1: Ghana; 2: Sierra Leone; 3: Guinea Bissau; 4: Togo and 5: Guinea. See materials and methods section for coding of the botanical and molecular clusters.

Mentions: The three botanical groups showed significant G×E interactions for the number of tillers produced per plant. This means that, in general, genotypes composing the three botanical groups followed different strategies in tiller production across environments (Figure 9). At cluster level, G×E interactions were also found for the two glaberrima clusters and for the Ind_Gc cluster, but were absent for the Ind_Gh cluster and the two clusters of japonica. This implies that within the japonica clusters and the Ind_Gh cluster genotypes all vary in tiller production in a similar way across environments.


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 of number of tillers per plant of 26 varieties in five experimental sites: 1: Ghana; 2: Sierra Leone; 3: Guinea Bissau; 4: Togo and 5: Guinea. See materials and methods section for coding of the botanical and molecular clusters.
© Copyright Policy
Related In: Results  -  Collection

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

pone-0034801-g009: Box plots of number of tillers per plant of 26 varieties in five experimental sites: 1: Ghana; 2: Sierra Leone; 3: Guinea Bissau; 4: Togo and 5: Guinea. See materials and methods section for coding of the botanical and molecular clusters.
Mentions: The three botanical groups showed significant G×E interactions for the number of tillers produced per plant. This means that, in general, genotypes composing the three botanical groups followed different strategies in tiller production across environments (Figure 9). At cluster level, G×E interactions were also found for the two glaberrima clusters and for the Ind_Gc cluster, but were absent for the Ind_Gh cluster and the two clusters of japonica. This implies that within the japonica clusters and the Ind_Gh cluster genotypes all vary in tiller production in a similar way across environments.

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