Identification of cowpea genotypes for drought tolerance

Bastos, E. A.; Nascimento, Sebastião Pereira do; Silva, Everaldo Moreira da; Filho, F. R. Freire; Gomide, R. L.

doi:10.1590/s1806-66902011000100013

Cited by 61 publications

(49 citation statements)

References 7 publications

(8 reference statements)

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“…Regarding the mass of 100 beans, mean values in cowpeas cultivated under full water supply were significantly higher than those in cowpeas exposed to water limiting conditions . Results from the present study confirmed that drought stress exerts a negative influence on cowpea productivity, as has been previously reported (Uarrota, 2010;Bastos et al, 2011;Nascimento et al, 2011).…”

Section: Discussionsupporting

confidence: 92%

Selection of cowpea progenies with enhanced drought-tolerance traits using principal component analysis

Sousa¹,

Damasceno‐Silva²,

Bastos³

et al. 2015

Genet. Mol. Res.

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ABSTRACT. 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 tolerance, by applying principal component analysis to 219 first-cycle progenies obtained in a recurrent selection program. The experimental design comprised a simple 15 x 15 lattice with 450 plots, each of two rows of 10 plants. Plants were grown under water-deficit conditions by applying a water depth of 205 mm representing one-half of that required by cowpea. Variables assessed were flowering, maturation, pod length, number and mass of beans/pod, mass of 100 beans, and productivity/plot. Ten elite cowpea genotypes were selected, in which principal components 1 and 2 encompassed variables related to yield (pod length, beans/pod, and productivity/plot) and life precocity (flowering and maturation), respectively.

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Section: Discussionsupporting

confidence: 92%

Selection of cowpea progenies with enhanced drought-tolerance traits using principal component analysis

Sousa¹,

Damasceno‐Silva²,

Bastos³

et al. 2015

Genet. Mol. Res.

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“…Water stress interferes with several physiological plant processes. In the case of cowpea, other authors have observed significant reductions of physiological processes as a result of water stress, such as stomatal conductance and leaf water potential (MENDES et al, 2007;NASCIMENTO et al, 2011) as well as total chlorophyll content of leaves (BASTOS et al, 2011). As a consequence, the weight of the aerial parts is reduced.…”

Section: Resultsmentioning

confidence: 98%

“…Also, water stress at intervals of 15 to 20 days in the vegetative phase delayed the onset of flowering. Bastos et al (2011), studying the cultivar Tracuateua -192, found significant differences in the number of pods per plant, number of grains per pod, weight of 100 grains and productivity when subjected to moderate water stress in the reproductive phase. Figure 4 shows the LAI variability along the growth cycle in the three experimental years.…”

Section: Resultsmentioning

confidence: 99%

Cowpea Leaf Area, Biomass Production and Productivity Under Different Water Regimes in Castanhal, Pará, Brazil

et al. 2017

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-This work evaluated the effect of soil water availability on growth and productivity variables of cowpea in northeastern Pará, Brazil. The experiment was carried out in a field of 2,100 m 2 at the experimental site of the Federal Rural University of Amazon, during the driest season of the years 2011, 2012 and 2013, in a completely randomised design with two treatments (irrigated and non-irrigated), both with 12 replications in the reproductive phase (2012 and 2013). Growth and productivity data were submitted to analysis of variance with two variation factors (water regime and experimental year) at 5% probability. Student's t-test at 5% probability was used in the means of the stomatal conductance data, since this was monitored only in 2012. Keywords: Vigna unguiculata. Productivity. Water availability. PRODUÇÃO DE ÁREA FOLIAR E BIOMASSA E PRODUTIVIDADE DO FEIJÃO-CAUPI SOB REGIMES HÍDRICOS EM CASTANHAL, PARÁRESUMO -O objetivo deste trabalho foi avaliar o efeito da disponibilidade de água no crescimento e produtividade do feijão-caupi cultivado no Nordeste do estado do Pará, Brasil. O experimento foi realizado em uma área de 2.100 m 2 na Fazenda Escola da Universidade Federal Rural da Amazônia, durante o período menos chuvoso de 2011, 2012 e 2013, em um delineamento inteiramente casualizado com dois tratamentos (irrigado e não irrigado), com 12 repetições na fase reprodutiva (2012 e 2013). Dados de crescimento e de produtividade foram submetidos a análise de variância com dois fatores de variação (regime hídrico e ano experimental) a 5% de probabilidade. Utilizou-se o teste t de Student a 5% de probabilidade nas médias de condutância estomática por ser monitorada apenas em 2012. A produção final de biomassa apresentou redução de 54,3% em 2012 e de 26,4% em 2013 devido a ocorrência de uma deficiência hídrica (DEF) de 76 e de 26 mm, respectivamente. A condutância estomática média foi reduzida em 73% na fase de enchimento de grãos devido a menor disponibilidade de água nesta fase. A produtividade média do caupi sob baixa deficiência hídrica atingiu 1.257 kg ha -1 em 2012 e 1.396 kg ha -1 e 2013. A redução da água diminuiu em 72% e 41% o rendimento do caupi (teste F, p < 0,05) em 2012 e 2013, respectivamente. A deficiência hídrica acumulada na fase reprodutiva causou redução de 47% no máximo IAF em 2012 (DEF de 76 mm) e de 13% em 2013 (DEF de 26 mm).Palavras-chave: Vigna unguiculata. Produtividade. Disponibilidade hídrica.

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“…Therefore, it becomes necessary to partition the observed phenotypic variability of various traits into its heritable and non-heritable components for exploiting inherent variability and further selection among genotypes with suitable genetic parameters such as phenotypic and genotypic coefficient of variation, heritability, genetic advance and genetic advance as percent of mean. Drought leads to increasing the yield losses in crops worldwide (Martinez et al, 2007;Bastos et al, 2011;Fulda et al, 2011;Kusvuran, 2012).). Global climate change by industrial revolution will affect crop productivity particularly that of vegetables including melon by frequent occurrence of drought (McCarthy andIPC, 2001, Ibrahim, 2012).…”

Section: Introductionmentioning

confidence: 99%

Genetic variability studies in response to drought under different water regimes in muskmelon (Cucumis melo L.)

Mishra

Sharma

2017

JANS

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A set of 40 genotypes of muskmelon (Cucumis melo L.) were evaluated in a randomized block design with two replications under different water regimes during summer 2012 at the agriculture research station Beechwal, Bikaner, Rajasthan, India to study genetic variability among the traits to determine selection criteria for breeding programmes for fruit yield and related characters. The results reported that drought stress caused reduction in fruit yield and most of the characters studied. Significant variations for all the characters were found under different water regimes (non-stress, 50% and 25%). High genotypic (GCV) and phenotypic (PCV) coefficient of variations were observed for fruit yield per plant, fruit weight per plant, vine length and proline content in non-stress, 50% and 25% water stress conditions respectively. High estimates of heritability along with high genetic advance as percentage of mean over the characters was recorded for fruit weight (128.79, 164.05, and 161.15), proline content (42.50, 72.86 and 69.26) and fruit yield per plant (149.61, 186.91 and 184.12) in both the non-stress and stress conditions. This shows that these traits were under the control of additive genetic effects. Therefore, it was concluded that selection for these traits should lead rapid genetic improvement of the material.

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Identification of cowpea genotypes for drought tolerance

Cited by 61 publications

References 7 publications

Selection of cowpea progenies with enhanced drought-tolerance traits using principal component analysis

Selection of cowpea progenies with enhanced drought-tolerance traits using principal component analysis

Cowpea Leaf Area, Biomass Production and Productivity Under Different Water Regimes in Castanhal, Pará, Brazil

Genetic variability studies in response to drought under different water regimes in muskmelon (Cucumis melo L.)

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