Potential of Cowpea Variety Mixtures to Increase Yield Stability in Subsistence Agriculture: Preliminary Results

Okonya, Joshua Sikhu; Maass, Brigitte L.

doi:10.1155/2014/515629

Cited by 15 publications

(8 citation statements)

References 17 publications

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“…Also, the variability of yields pooled from intercropping partners is generally lower than in the constituent monocrops, because of compensatory and complementary effects. Similarly, cultivar mixtures are associated with higher stability than single varieties, for example, as recently shown for cowpeas in Uganda (Okonya and Maass 2014). However, the yield variability of the grain legume partner in an intercropping mixture can be greater than in the sole crop (Böhm 2013).…”

Section: Factors Affecting Yield Stability In Grain Legumesmentioning

confidence: 94%

Grain Legumes

2015

Handbook of Plant Breeding

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The field of plant breeding covers a broad range of different species and categories of plants. While there are many techniques and issues that are similar across these species, many more are unique to each genus.The Handbook of Plant Breeding is organized by major crop categories and includes the most up-to-date molecular techniques being used. It will serve as a resource for plant breeding laboratories in both the university and industrial setting.More information about this series at

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Section: Factors Affecting Yield Stability In Grain Legumesmentioning

confidence: 94%

Grain Legumes

2015

Handbook of Plant Breeding

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“…However, the highest number of sweet potato varieties grown by male-and female-headed households was ten and seven, respectively. Variety mixtures have been reported elsewhere to stabilize and increase crop yields in cowpea [24] and suppress diseases [25]. Bashaasha et al, [20] pointed out that farmers grew sweet potato in mixtures due to shortage of vines, the desire to extend harvesting periods, the need to stabilize root yield and to improve household food security.…”

Section: Sweet Potato Production Techniquesmentioning

confidence: 99%

Gender differences in access and use of selected productive resources among sweet potato farmers in Uganda

Okonya

Kroschel

2014

Agric & Food Secur

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Background: In spite of women making up the biggest workforce in food production, processing and preparation in Africa, little is known about how women access production resources, especially concerning sweet potato enterprise. Based on the sex of the household head, we compared male and female sweet potato farmers' access to agricultural information, credit and extension in Uganda. Differences in sweet potato production techniques, contribution of sweet potato to household food security or cash income, off-farm income sources and membership to farmers' group were also determined. Methods: A diagnostic survey was conducted using a questionnaire in six districts of Uganda. A total of 139 and 53 male-and female-headed households were interviewed, respectively. The study was largely descriptive and data was analyzed using the SAS package. Results: Few male-(5.8%) and female-(7.5%) headed households used fertilizers. Over 80% of both male-and female-headed households grew sweet potato primarily for home consumption. Only a few male-(8.6%) and female-(9.4%) headed households had received any form of agricultural information related to sweet potato production, marketing or value addition in the 12 months preceding the survey. Information sources on sweet potato cropping were numerous, with both farmers' own experience and friends or relatives (8.3 and 40.0% for male-and female-headed households, respectively) being equally the most common. Although none of the female-headed households received agricultural information from both governmental extension agents and non-governmental organizations, male-and female-headed households had similar chances of receiving information. More female-headed households had no off-farm income (67.9%) and lacked access to credit (26.4%) than did their male counterparts. Male-headed households had significantly more members who belonged to a farmer organization (44.6%) compared to female-headed households (30.2%). Conclusions: Both male-and female-headed households were found to have relatively equal but very low access to both agricultural information and credit. There is a need to develop and disseminate integrated sweet potato management messages for better understanding and efficient use, preferably in local languages and through mass media. There is evidence of anti-female household heads' bias in membership to farmer organizations. It is recommended that men receive training on gender mainstreaming and awareness, so as to appreciate the role women play in the sweet potato value chain.

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“…Also, the associated human health and environmental hazards make this form of control less desirable. Host plant resistance, which is the most promising alternative has been a major goal of most cowpea breeding programs in sub-Saharan Africa (Okonya and Maass 2014). In view of its economic, food security and nutrition security importance, concerted efforts are required towards developing thrips resistant varieties which SSA farmers can grow successfully with limited need for insect control measures.…”

Section: Introductionmentioning

confidence: 99%

Genetic variability and trait association under thrips (Megalurothrips sjostedti Trybom) infestation in cowpea (Vigna unguiculata [L.] Walp.)

et al. 2021

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Flower bud thrips is one of the most destructive insect pests of cowpea in sub-Saharan Africa. Information on genetic variability among cowpea germplasm and interrelationships among traits under thrips infestation would facilitate the development of resistant varieties. The objectives of the study were to assess genetic variability for thrips resistance, estimate heritability of yield and other traits and investigate inter-trait relationships under thrips infestation. One hundred and fifty-six cowpea lines, including one resistant and one susceptible check, were screened for resistance under natural infestation at two locations in Nigeria, in 2016. Test lines were scored for thrips damage weekly for three consecutive weeks, after removal of spreader plants, to obtain damage scores (DS) 1, 2 and 3 while data were collected on agronomic traits. The data were subjected to analysis of variance from which genetic components of the phenotypic variance were computed. Interrelationships among traits were determined using phenotypic and genotypic correlation, and sequential path analyses. Significant variability was observed among test lines. Lines TVu 6824 and TVNu 1307 were identified as possessing thrips resistance. DS3 had significant genetic and phenotypic correlations with DS1, DS2 and yield-related traits. Number of pods per peduncle, number of peduncles per plant and DS3 were identified as first-order traits. Heritability estimates ranged from 0.55 to 0.73. Genetic variability among the lines suggests the possibility of genetic control of thrips while number of pods per peduncle, number of peduncles per plant and DS3 would serve as useful selection criteria for thrips resistance.

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Potential of Cowpea Variety Mixtures to Increase Yield Stability in Subsistence Agriculture: Preliminary Results

Cited by 15 publications

References 17 publications

Grain Legumes

Grain Legumes

Gender differences in access and use of selected productive resources among sweet potato farmers in Uganda

Genetic variability and trait association under thrips (Megalurothrips sjostedti Trybom) infestation in cowpea (Vigna unguiculata [L.] Walp.)

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