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Participatory evaluation of Guinea yam (Dioscorea cayenensis Lam.–D. rotundata Poir. complex) landraces from Benin and agro-morphological characterization of cultivars tolerant to drought, high soil moisture and chips storage insects

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Abstract

Guinea yam (Dioscorea cayenensis Lam.–D. rotundata Poir. complex) is an important tuber crop that highly contributes to food security and poverty alleviation in Benin. However, its production is seriously affected by many biotic and abiotic constraints which could be overcame by concentrating the production on resistant or tolerant cultivars. In order to identify such cultivars that are known to exist in Benin traditional agriculture, 51 villages were randomly selected throughout the production zones and surveyed. Out of the 426 cultivars (subject to synonymy) evaluated using participatory approach and 13 agronomic, culinary, and technological traits, 25, 47, 49, 64 and 64 cultivars respectively tolerant to poor soils, nematodes, high soil moisture (adaptability to lowland), drought and chips (peeled and dried tuber) storage insects were, among others, identified. These pools of cultivars could serve in breeding program or be directly used in varietal exchanges towards the zones of interests. The agromorphological characterisation conducted per pool of performing cultivars revealed the existence of many duplicates that should be clarified with the use of molecular markers. Flowering, sex and intensity of flowering of the different cultivars were analysed and revealed a low rate (11.68 %) of non-floriferous plants, a high rate (61.03 %) of plants with low intensity of flowering and five types of male inflorescences indicating a hypothetical evolution towards the suppression of flowering with the cultivated yams.

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Acknowledgments

This study was funded by the Global Crop Diversity Trust (Rome, Italy) and carried out by the Laboratory of Agricultural Biodiversity and Tropical Plant Breeding (LAAPT, now BIORAVE) of the University of Abomey-Calavi (UAC). We would like to thank Mr Emile Edéa for designing the maps Mr Innocent Dossou Aminon, Mr Paterne Agre and Mrs Prisca Assogba for their technical assistance. We express our sincere gratitude to all producers, chiefs of village, leaders of farmers’ groups and agricultural technicians met for their contribution to the success of the study.

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Authors and Affiliations

  1. Laboratory of Biotechnology, Genetic Resources and Plant and Animal Breeding (BIORAVE), Faculty of Sciences and Technology of Dassa, Polytechnic University of Abomey (UPA), BP 14, Dassa, Benin

    Y. L. Loko, A. Adjatin & A. Dansi

  2. Bioversity International, Office of West and Central Africa, 08 BP 0931, Cotonou, Benin

    R. Vodouhè

  3. Laboratory of Biochemistry and Molecular Biology, Faculty of Sciences and Technology (FAST), University of Abomey-Calavi (UAC), P.O. Box 526, Cotonou, Benin

    A. Sanni

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  1. Y. L. Loko
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  2. A. Adjatin
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  3. A. Dansi
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  4. R. Vodouhè
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  5. A. Sanni
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Correspondence to Y. L. Loko.

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Loko, Y.L., Adjatin, A., Dansi, A. et al. Participatory evaluation of Guinea yam (Dioscorea cayenensis Lam.–D. rotundata Poir. complex) landraces from Benin and agro-morphological characterization of cultivars tolerant to drought, high soil moisture and chips storage insects. Genet Resour Crop Evol 62, 1181–1192 (2015). https://doi.org/10.1007/s10722-015-0221-y

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