Agro-morphological variability of rice species collected from Niger

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cg.contributor.affiliationAfrica Rice Centeren
cg.contributor.affiliationInstitut National de la Recherche Agronomique du Nigeren
cg.contributor.affiliationUniversity of KwaZulu-Natalen
cg.coverage.countryNiger
cg.coverage.iso3166-alpha2NE
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.identifier.doihttps://doi.org/10.1017/s1479262113000221en
cg.issn1479-263Xen
cg.issue1en
cg.journalPlant Genetic Resourcesen
cg.volume12en
dc.contributor.authorSow, Men
dc.contributor.authorSido, A.en
dc.contributor.authorLaing, M.en
dc.contributor.authorNdjiondjop, M.N.en
dc.date.accessioned2021-12-06T12:34:02Zen
dc.date.available2021-12-06T12:34:02Zen
dc.identifier.urihttps://hdl.handle.net/10568/116530
dc.titleAgro-morphological variability of rice species collected from Nigeren
dcterms.abstractNiger harbours a wealth of diversity of Africa's rice (Oryza glaberrima) and its related wild species. We therefore engaged in a collecting mission of rice species across growing regions and agrosystems in Niger. A total of 270 rice accessions were assembled, including 177 Asian rice (O. sativa) cultivars, 67 African rice landraces (O. glaberrima), 25 O. barthii and one O. longistaminata. We found most accessions (80.7%) along the Niger River and its tributary the Dallol Maouri. Many of the accessions, except those belonging to the wild O. barthii initially found around the Lake Chad region, were also collected along the Niger River. Drought, insects, birds, rice yellow mottle virus and bacterial blight were noted as major constraints on rice production. Accession naming by farmers was consistent within regions but seldom across regions. Based on the recorded agro-morphological traits, the germplasm was classified into three clusters: (1) O. longistaminata with floating African landraces and late-maturing floating Asian rice; (2) lowland O. barthii and African landraces; (3) a mixture of irrigated Asian rice with lowland accessions of both cultivated species. The phenotypic variability of the germplasm collection, as measured by the Shannon–Weaver diversity index, was relatively high (H′ = 0.69), with accessions in the irrigated agrosystem being less diverse than those in the traditional agrosystems. There was no significant difference in the magnitude of diversity between the main eco-geographical zones and between the clusters. However, some traits contributing the most to this diversity were different. This study suggested a substantial germplasm exchange between regions in Niger.en
dcterms.accessRightsLimited Access
dcterms.available2013-07-18
dcterms.bibliographicCitationSow, M. Sido, A. Laing, M. Ndjiondjop, M. N.Agro-morphological variability of rice species collected from Niger. Plant Genetic Resources. 2013, Volume 12, Issue 1: 22-34.en
dcterms.extentp. 22-34en
dcterms.issued2014-04
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherCambridge University Pressen
dcterms.subjectgenetic resourcesen
dcterms.subjectriceen
dcterms.subjectoryza glaberrimaen
dcterms.subjectoryza sativaen
dcterms.typeJournal Article

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