Research Article

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07/15/2008
Arabidopsis disease resistance genes; Arachis; genetic mapping; Molecular markers; Single nucleotide polymorphisms

The cultivated peanut (Arachis hypogaea L.) is an allotetraploid of recent origin, with an AABB genome and low genetic diversity. Perhaps because of its limited genetic diversity, this species lacks resistance to a number of important pests and diseases. In contrast, wild species of Arachis are genetically diverse and are rich sources of disease resistance genes. Consequently ... more

D.M.T. Alves; R.W. Pereira; S.C.M. Leal-Bertioli; M.C. Moretzsohn; P.M. Guimarães; D.J. Bertioli
03/06/2015
genetic mapping; Heterozygosity; Simple sequence repeat marker; Tea cultivars

Genetic maps are essential tools for quantitative trait locus analysis and marker-assisted selection breeding. In order to select parents that are highly heterozygous for genetic mapping, the heterozygosity (HS) of 24 tea cultivars (Camellia sinensis) was analyzed with 72 simple sequence repeat markers. In total, 359 alleles were obtained with an average of 4 ... more

L.Q. Tan; C.C. Zhang; G.N. Qi; L.Y. Wang; K. Wei; S.X. Chen; Y. Zou; L.Y. Wu; H. Cheng
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Cultivars; Human nutrition; Semi-arid tropics; Vigna unguiculata

One strategy to mitigate human malnutrition in semi-arid areas is to increase the protein and mineral content of cowpea cultivars. Total seed protein, potassium, calcium, iron, zinc, and sodium contents were quantified in elite cowpea lines, with the aim to develop cultivars that had improved levels of these nutrients. Eighty-seven F6 lines derived from 6 crosses were ... more

C.A.F. Santos; L.S. Boiteux
02/08/2012
Cowpea; Genetic diversity; Germplasm management; Microsatellites; Vigna unguiculata

Genetic diversity and phylogenetic relationships among 22 local cowpea (Vigna unguiculata) varieties and inbred lines collected throughout Senegal were evaluated using simple sequence repeat molecular markers. A set of 49 primer combinations were developed from cowpea genomic/expressed sequence tags and evaluated for their ability to detect polymorphisms among the various cowpea ... more

F.A. Badiane; B.S. Gowda; N. Cissé; D. Diouf; O. Sadio; M.P. Timko
03/31/2014
Callosobruchus maculates; Inter simple sequence repeat; Vigna unguiculata

The cowpea weevil (Callosobruchus maculatus Fabr.) is the most destructive pest of the cowpea bean; it reduces seed quality. To control this pest, resistance testing combined with genetic analysis using molecular markers has been widely applied in research. Among the markers that show reliable results, the inter-simple sequence repeats (ISSRs) (microsatellites) are noteworthy. ... more

M.X.Vila Nova; N.G.A. Leite; L.M. Houllou; L.V. Medeiros; A.C.Lira Neto; B.S. Hsie; L.R. Borges-Paluch; B.S. Santos; C.S.F. Araujo; A.A. Rocha; A.F. Costa
12/07/2015
Cowpea; Drought tolerance; Multivariate analysis; Recurrent selection; Vigna unguiculata

Vigna unguiculata (L.) Walp (cowpea) is a food crop with high nutritional value that is cultivated throughout tropical and subtropical regions of the world. The main constraint on high productivity of cowpea is water deficit, caused by the long periods of drought that occur in these regions. The aim of the present study was to select elite cowpea genotypes with enhanced drought ... more

C.C. Sousa; K.J. Damasceno-Silva; E.A. Bastos; M.M. Rocha
05/13/2016
Genetic control; Hybrid combination; OCC; SCC; Vigna unguiculata

The purpose of this study was to identify parents and obtain segregating populations of cowpea (Vigna unguiculata L. Walp.) with the potential for tolerance to water deficit. A full diallel was performed with six cowpea genotypes, and two experiments were conducted in Teresina, PI, Brazil in 2011 to evaluate 30 F2 populations and their parents, one under water deficit ... more

E.V. Rodrigues; K.J. Damasceno-Silva; M.M. Rocha; E.A. Bastos; E.V. Rodrigues; K.J. Damasceno-Silva; M.M. Rocha; E.A. Bastos
11/03/2016
Artificial Intelligence; Genotype x environment interaction; Vigna unguiculata

Cowpea (Vigna unguiculata) is grown in three Brazilian regions: the Midwest, North, and Northeast, and is consumed by people on low incomes. It is important to investigate the genotype x environment (GE) interaction to provide accurate recommendations for farmers. The aim of this study was to identify cowpea genotypes with high adaptability and phenotypic ... more

L.M.A. Barroso; P.E. Teodoro; M. Nascimento; F.E. Torres; A.C.C. Nascimento; C.F. Azevedo; F.R.F. Teixeira; L.M.A. Barroso; P.E. Teodoro; M. Nascimento; F.E. Torres; A.C.C. Nascimento; C.F. Azevedo; F.R.F. Teixeira
03/28/2019
Genetic diversity; Germplasm collection; Molecular markers; Vigna unguiculata

The cowpea, Vigna unguiculata (Fabeaceae) is widely cultivated in semi-arid regions, such as northeast Brazil. Due to the low crop yields in this region, it would be useful to develop cultivars adapted to these climate conditions. Landraces are seen as an important source of germplasm to be used in breeding programs of this species due to their good adaptation to the environment, but ... more

L.B.R. Araújo; L.B.C. Fiege; A.V.A. Silva; C.H.C.M. Bertini
07/04/2019
Genetic resources; Orthodox seeds; Seed Bank; Vigna unguiculata

Deterioration and loss of seed germination in the germplasm are related to the aging that occurs during the conservation process. The mechanisms related to the aging and death of seeds are not yet fully understood, but it is known that longevity can be affected by moisture content and temperature. We examined the effects of accelerated aging (A.A.) on the DNA of ... more

S.E.M. Santos; M.A. Gimenes; J.O.Lde Oliveir Júnior; M. .F.Costa; M. .F.C.Gomes; S.E.S. Valente

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