Development of cowpea cultivars and germplasm by the Bean/Cowpea CRSP

Hall, Anthony E.; Cissé, Ndiaga; Thiaw, Samba; Elawad, H.O.A.; Ehlers, Jeffrey D.; Ismail, Abdelbagi M.; Fery, Richard L.; Roberts, Philip A.; Kitch, L. W.; Murdock, Larry L.; Boukar, Ousmane; Phillips, R. Dixon; McWatters, Kay H.

doi:10.1016/s0378-4290(03)00033-9

Cited by 146 publications

(117 citation statements)

References 84 publications

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“…These results show that the cowpea has significant productive potential (HALL et al, 2003;ALVES et al, 2009) …”

Section: Source Of Variationmentioning

confidence: 64%

“…It is one of the main components of the diet of Brazilians, especially in the North and Northeast regions, in which the cowpea production is concentrated. However, the cowpea crop average yield in Brazil ranges between 400 and 500 kg ha -1 , far below its productive potential, estimated in 5,000 to 6,000 kg ha -1 (HALL et al, 2003;ALVES et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the cowpea crop is expanding to the Brazilian Midwest and Southeast regions as an option for winter crop, after the soybean, corn and rice summer crops, reaching yields above 1,000 kg ha -1 . This expansion was due to the development of new cultivars with compact and erect characteristics, favoring mechanization (FREIRE FILHO et al, 2011), and responsive to soil fertility, and due to the benefits of rotation with other agricultural species, ensuring a more sustainable crop system (HALL et al, 2003). Teixeira et al (2010) studied cowpea crop in a dry season in Catalão, Goias, Brazil, and observed adaptation of the cultivars BRS-Guariba (grain yield of 2,211 ha -1 ) and /87BR17-Gurguéia (2,196 kg ha -1 ) to the local climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

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Agronomic Performance of Cowpea Cultivars Depending on Sowing Seasons in the Cerrado Biome

et al. 2017

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-The objective of this work was to assess the agronomic performance of cowpea cultivars depending on sowing seasons in the Cerrado biome. Thus, an experiment was conducted in Uberaba, State of Minas Gerais, Brazil, in a complete randomized block design, in a 6x3 factorial arrangement, using six cowpea cultivars (BRS-Itaim, BRS-Guariba, BRS-Potengi, BRS-Cauamé, BRS-Novaera and BRS-Tumucumaque) and three sowing seasons (Dec 14, 2012; Jan 14, 2013; and Feb 14, 2013), with four replications. The interaction between the cultivars and sowing seasons was assessed regarding the number of days for full flowering, number of days for pod maturation, number of trifoliate leaves, height of the first pod-bearing node, pod length, number of pods per plant, final plant population, 100-grain weight and grain yield. The cowpea cultivars sown in December produced the lowest numbers of pods per plant and grains per pod, resulting in the lowest grain yields. The cultivar BRS-Tumucumaque had the highest grain yield in the January sowing. The highest grain yields were found in the February sowing, especially when the cultivars BRS-Itaim (3,439 kg ha ), BRS-Guariba (3,168 kg ha -1 ) and BRS-Potengi (3,107 kg ha -1 ) was used.

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“…These results show that the cowpea has significant productive potential (HALL et al, 2003;ALVES et al, 2009) …”

Section: Source Of Variationmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Agronomic Performance of Cowpea Cultivars Depending on Sowing Seasons in the Cerrado Biome

et al. 2017

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“…BR1 and LORI are improved cultivars with an intermediate growth cycle, adapted and adopted in north Cameroon, whereas VYA, harvested from Maroua (Cameroon) in 2006, is a local long-cycle cultivar also adopted in north Cameroon, but which is very susceptible to the cowpea weevil Callosobruchus maculatus. All three cultivars are susceptible to S. gesnerioides (Hall et al 2003).…”

Section: Biological Materialsmentioning

confidence: 96%

Striga seed-germination activity of root exudates and compounds present in stems of Striga host and nonhost (trap crop) plants is reduced due to root colonization by arbuscular mycorrhizal fungi

2009

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Striga seed-germination activity of root exudates and compounds present in stems of Striga host and nonhost (trap crop) plants is reduced due to root colonization by arbuscular mycorrhizal fungi Abstract Root colonization by arbuscular mycorrhizal (AM) fungi reduces stimulation of seed germination of the plant parasite Striga (Orobanchaceae). This reduction can affect not only host plants for Striga, resulting in a lower parasite incidence, but also false hosts or trap crops, which induce suicidal Striga seed germination, thereby diminishing their effectiveness. In order to better understand these AM-induced effects, we tested the influence of root colonization by different AM fungi on the seed-germination activity of root exudates of the Striga hermonthica nonhost plants cowpea and cotton on S. hermonthica. We also tested the effect of AM fungi on the seed-germination activity of the Striga gesnerioides host plant cowpea on S. gesnerioides. Moreover, we studied whether mycorrhization affects the transport of seedgermination activity to above-ground plant parts. Mycorrhization not only resulted in a lower seed germination of S. gesnerioides in the presence of root exudates of the S. gesnerioides host cowpea but also seed germination of S. hermonthica was also lower in the presence of root exudates of the S. hermonthica nonhosts cowpea and cotton. Downregulation of the Striga seedgermination activity occurs not only in root exudates upon root colonization by different AM fungi but also in the compounds produced by stems. The lowered seedgermination activity does not appear to depend on the presence of seed germination inhibitors in the root exudates of mycorrhizal plants. The implication for Striga control in the field is discussed.

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“…Cowpea feeds millions of people in the developing world with an annual worldwide production estimated around 4.5 million metric tons on 12 to 14 million ha (Diouf, 2011). Various uses of cowpea have been reported by Ogbuinya (1997) and Hall et al (2003). In Nigeria, production and release of improved cowpea varieties have been slow especially in the humid and semi humid regions.…”

Section: Introductionmentioning

confidence: 99%

Genetic Variability, Heritability and Genetic Advance in Cowpea Genotypes in Two Agro-ecological Environments

Nwosu¹,

Olatunbosun²,

Adetiloye³

2013

GJBS

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Studies on genetic variability, heritability and genetic advance were carried out with five genotypes of cowpea (Vigna unguiculata L. Walp) cultivated at two (rainforest and guinea savannah) agroecological environments. Analysis of variance revealed that though there was no significant interaction among the genotypes for most of the characters studied, they varied significantly for all the 16 characters at each of the two locations, indicating the existence of considerable variation for all the characters. Considerable amount of genotypic and phenotypic coefficient of variation was observed for all characters. High Heritability and genetic advance as per cent of mean were shown by clusters per plant, pods per plant, peduncle length, pod length, dry pod weight, hundred seed weight, seed per pod, number of seeds per plant and seed yield per plant indicating that these traits were controlled by additive genetic effects and could be dependable for grain improvement in cowpea.

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Development of cowpea cultivars and germplasm by the Bean/Cowpea CRSP

Cited by 146 publications

References 84 publications

Agronomic Performance of Cowpea Cultivars Depending on Sowing Seasons in the Cerrado Biome

Agronomic Performance of Cowpea Cultivars Depending on Sowing Seasons in the Cerrado Biome

Striga seed-germination activity of root exudates and compounds present in stems of Striga host and nonhost (trap crop) plants is reduced due to root colonization by arbuscular mycorrhizal fungi

Genetic Variability, Heritability and Genetic Advance in Cowpea Genotypes in Two Agro-ecological Environments

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