Genetic divergence among African cowpea lines based on morphoagronomic traits

Costa, Eva Maria Rodrigues; Damasceno‐Silva, Kaesel Jackson; Rocha, M. M.; Medeiros, Artur Mendes; Filho, C.J. Anunciação

doi:10.4238/2013.december.16.3

Cited by 3 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The genetic coefficient of variation (CVg) to experiment coefficient of variation (CVe) ratio (CVg:CVe), or selection potential of the test, was high mainly for GY and 100GW, indicating that the selection may be effective for these characters (Table 2). Similar values were found by Costa et al (2013). A high CVg:CVe indicates the existence of genetic variability among the progenies.…”

Section: Resultssupporting

confidence: 82%

Selection for the Development of Black Eye Cowpea Lines

et al. 2018

View full text Add to dashboard Cite

Cowpea bean is a socioeconomically important legume that contribute to generate employment and income. This species presents great grain variability, and the commercial subclass black eye stands out as a very appreciated grain in Brazil and abroad, thus requiring the development of new cultivars. The objective of this work was to evaluate and select lineages of commercial black eye cowpea, based on simultaneous, and direct selection. First, 105 progenies and four controls were evaluated using the Federer's augmented block design. Seventy-seven progenies, selected from this evaluation-first selection cycle-and four controls were evaluated in three environments, using a simple 9×9 lattice design. Based on this evaluation, the second selection cycle was possible, resulting in 24 progenies. The gain by direct selection was lower than the predicted gain for grain yield in the first cycle, indicating that the selection was not effective. This result was probably due to the reduced genetic variability caused by the selection pressure. In the second cycle, the predicted and observed gains were similar, indicating that much of the expected gain was observed. The predicted and observed gains, with simultaneous selection based on the rank sum selection index, were similar in the first and second cycle. The simultaneous and direct selections resulted in genetic gains for grain yield in the two selection cycles, making it possible the selection of high grain yield lineages.

show abstract

Section: Resultssupporting

confidence: 82%

Selection for the Development of Black Eye Cowpea Lines

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Resultados similares foram obtidos em outros trabalhos com feijão-caupi (Barros et al, 2013;Bertini et al, 2009;Cargnelutti Filho et al, 2010;Costa et al, 2013;Lopes et al, 2001;Oliveira et al 2002;2003;Santos et al, 2014;Teixeira et al 2010). Os genótipos não diferiram entre si quanto aos dias para o florescimento, apresentando média geral de 50 dias.…”

Section: Resultsunclassified

Desempenho agronômico e divergência genética entre genótipos de feijão-caupi cultivados no ecótono Cerrado/Pantanal

et al. 2014

View full text Add to dashboard Cite

ResumoObjetivou-se com este trabalho avaliar o desempenho agronômico e a divergência genética entre genótipos de feijão-caupi cultivados na região do ecótono Cerrado/Pantanal. O experimento foi conduzido no ano de 2008 na área experimental da Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Aquidauana (UEMS/UUA). Os tratamentos consistiram de 20 genótipos de feijão-caupi dispostos em delineamento de blocos casualizados com quatro repetições. Avaliaram-se os seguintes caracteres: início do florescimento, início de maturação, massa de cinco vagens, massa de grãos de cinco vagens, índice de grãos, massa de 100 grãos e produtividade de grãos. A divergência genética entre os tratamentos foi determinada com base na análise de agrupamento e nas variáveis canônicas. O genótipo BRS 17-Gurgueia apresentou maior produtividade de grãos. Híbridos com maior efeito heterótico serão obtidos do cruzamento entre a linhagem Pingo-de-ouro-2 com as cultivares BRS 17-Gurgueia e BRS-Paraguassu.Palavras-chave: caracteres agronômicos, dissimilaridade, variabilidade genética, Vigna unguiculata. Agronomic performance and genetic divergence among cowpea genotypes in Cerrado/ Pantanal ecotone AbstractThe objective of this study was to evaluate the agronomic performance and genetic divergence among genotypes of cowpea in the Cerrado/Pantanal ecotone region. The experiment was conducted in 2008 in the experimental area of the State University of Mato Grosso do Sul, University Unit of Aquidauana (UEMS/UUA). Treatments consisted of 20 genotypes of cowpea arranged in a randomized complete block design with four replications. Was evaluated the following characters: beginning of the flowering, beginning of the maturation, mass of five pods, grain mass of five pods, grain index, mass of 100 grains and grain yield. The genetic divergence between treatments was determined based on the clustering analysis and the canonical variables. The genotype BRS-17 Gurguéia showed higher grain yield. Hybrids with high heterotic effect will be obtained from crosses of Pingode-ouro-2 strain with BRS 17-Gurguéia and BRS-Paraguassu cultivars.

show abstract

“…Morphological traits have been used for diversity analyses in African leafy vegetables such as Solanum spp., Vigna unguiculata, Amaranthus spp., and Cleome gynandra [2]- [5]. The limitations of these traits result from the plasticity of certain traits and modifications caused by the environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Molecular Markers for Genetic Diversity Studies in African Leafy Vegetables

Omondi¹,

Debener²,

Linde³

et al. 2016

ABB

View full text Add to dashboard Cite

African leafy vegetables are becoming important crops in tackling nutrition and food security in many parts of sub-Saharan Africa, since they provide important micronutrients and vitamins, and help resource-poor farm families bridge lean periods of food shortage. Genetic diversity studies are essential for crop improvement programmes as well as germplasm conservation efforts, and research on genetic diversity of these vegetables using molecular markers has been increasing over time. Diversity studies have evolved from the use of morphological and biochemical markers to molecular markers. Molecular markers provide valuable data, since they detect mostly selectively neutral variations at the DNA level. They are well established and their strengths and limitations have been described. New marker types are being developed from a combination of the strengths of the basic techniques to improve sensitivity, reproducibility, polymorphic information content, speed and cost. This review discusses the principles of some of the established molecular markers and their application to genetic diversity studies of African leafy vegetables with a main focus on the most common Solanum, Amaranthus, Cleome and Vigna species.

show abstract

Genetic divergence among African cowpea lines based on morphoagronomic traits

Cited by 3 publications

References 14 publications

Selection for the Development of Black Eye Cowpea Lines

Selection for the Development of Black Eye Cowpea Lines

Desempenho agronômico e divergência genética entre genótipos de feijão-caupi cultivados no ecótono Cerrado/Pantanal

Molecular Markers for Genetic Diversity Studies in African Leafy Vegetables

Contact Info

Product

Resources

About