Inheritance of Resistance to Aphid in Cowpea1

Bata, H. D.; Singh, Balwinder; Singh, Sukhpal; Ladeinde, T. A. O.

doi:10.2135/cropsci1987.0011183x002700050011x

Cited by 43 publications

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“…The genetics of resistance of ICV-12 and other resistant cowpea lines ha ve been well-documented by Ombakho et al (1987), Bata et al (1987) and Pathak (1988). The classification of mechanisms of cowpea aphid resistance in ICV-12, and the effects of host plant resistance on aphid population dynamics and on crop performance have also been well-studied (Ofuya, 1989(Ofuya, , 1993Annan, 1992).…”

Section: Introductionmentioning

confidence: 99%

Pattern and rate of within-field dispersal and bionomics of the cowpea aphid, Aphis craccivora (Aphididae), on selected cowpea cultivars

Annan

Schaefers

Tingey

et al. 1999

Int. J. Trop. Insect Sci.

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Abstract-Comparative field studies were conducted during the rainy and dry seasons at the Mbita Point Field Station of ICIPE in southwestern Kenya, to investigate the pattern and rate of dispersal of Aphis craccivora on aphid-resistant (ICV-12) and aphid-susceptible (ICV-1) cowpea cultivars in relation to key weather factors. The effects of the dispersal trends on crop performance and aphid population dynamics were analysed. Treatments consisted of initial aphid releases at the north, south, west, east and centre of test plots and uninfested controls maintained on plants for 22 days. Parameters recorded included: pattern (direction of spread of aphids) and rate (number of aphidinfested plants at a given time) in test plots; crop growth and yields and associated factors such as incidence of sooty mould and plant mortality, and aphid density and associated factors, including the incidence of natural enemy species, particularly coccinellids. Dispersal was fastest when releases were made in the west, north and centre of plots, and resulted in adverse effects on ICV-1 growth and yields. Infestations of ICV-12 did not significantly affect crop performance. There was an apparent direct, positive relationship between wind direction and pattern of spread of aphid infestations, but this pattern was more apparent during the rainy season, when wind speeds were higher, than during the dry season. The incidence of natural enemy species correlated with the spread of aphid infestations, while the abundance of coccinellids correlated with aphid density.Key Words: Aphis craccivora, wind direction, within-field dispersal, phenology, cowpea, Vigna unguicidata, aphid natural enemies, bionomics, KenyaResume-Des essais comparatifs en champs on ete conduits en saison seche et en saison pluvieuse a la Station Experimentale de 1' ICIPE, a Mbita-Point (Sud-Ouest du Kenya). Ceux-ci avaient pour objet d'etudier, en fonction des facteurs climatiques principaux, le mode de repartition et les taux de dispersion du puceron Aphis craccivora chez cultivars de niebe, dont le premier (ICV-12) resistant et le second (ICV-1) sensible. Les effets du mode de dispersion sur la performance de la culture et la dynamique de populations du puceron etaient analyses. Les traitements consistaient en lachers initiaux de pucerons dans les points cardinaux (nord, sud, ouest, est, centre) des parcelles Les parametres etudies etaient la direction de dispersion du puceron et le taux d'infestation des plantes, a l'interieur des parcelles sous essais et a un temps donne; la croissance des plantes et les rendements. En plus de ces parametres, etaient etudies des facteurs associes comme 1' incidence de miellat et la deperissement de la plante; la densite du puceron et les facteurs associes dont: l'incidence des ennemis naturels et plus particulierement les coccinelles. La dispersion des pucerons etait plus rapide quand les lachers etaient effectues dans les parties ouest, nord ou centre des parcelles. De tels lachers avaient des effets nefastes sur la croissance et les ...

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Section: Introductionmentioning

confidence: 99%

Pattern and rate of within-field dispersal and bionomics of the cowpea aphid, Aphis craccivora (Aphididae), on selected cowpea cultivars

Annan

Schaefers

Tingey

et al. 1999

Int. J. Trop. Insect Sci.

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“…Examples are the resistances in lettuce to Nasonovia ribisnigri (Eenink et al, 1982), in cowpea to Aphis craccivora (Bata et al, 1987;Pathak, 1988), in melon to Aphis gossypii (Pitrat & Lecoq, 1982;Yoshida et al, 1986) and in peach to M. persicae (Massonie & Monet, 1988). Reports of studies on the genetics of partial resistance to aphids are rare.…”

Section: Discussionmentioning

confidence: 99%

Inheritance of partial resistance to Myzus persicae in lettuce

1994

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The genetics of partial resistance of lettuce to Myzuspersicae was studied using F1 and F2 generations of two crosses between a susceptible and partially resistant accession (Norden x Batacer and Liba x Norden) and three crosses in which both parents were partially resistant (Batavia la Brillante x Batacer, Batacer × Liba and CGN4741 × Batacer). Partial resistance to M. persicae inherited quantitatively, without important dominance effects. Only in the cross Batacer × Liba were significant departures of the F1 and F2 from the midparent found, which were probably caused by epistatic effects. Reciprocal Fls had similar resistance levels, indicating the absence of cytoplasmic or other maternal effects. Estimates of broad-sense heritability ranged from 0.34 to 0.61. The results indicated that lines with an improved resistance level can be obtained from crosses between partially resistant accessions, preferably by line selection or the application of indirect marker aided selection.

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“…food legume and a versatile crop cultivated between 35 0 N to 30 0 S of the equator, covering Asia and Africa, southern Europe and some parts of southern America (Bata et al, 1987). However, being a drought tolerant crop with better growth in warm climate, cowpea is most popular in the semi arid region of the tropics, where other food legumes do not perform very well.…”

Section: Cowpea (Vigna Unguiculata [L] Walp) Is An Importantmentioning

confidence: 99%

Screening for Development of Host Plant Resistance to Infestation by Aphid (Aphis Craccivora Koch) in Cowpea (Vigna Unguiculata [L] Walp)

Babura¹,

Mustapha²

2012

Bayero J. Pure App. Sci.

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A study was carried out at International Institute of Tropical Agriculture (IITA) Kano station during 2009 and 2010 growing season, to screen fifty two (52) cowpea varieties for resistance to aphids (Aphis craccivora) attack. It was found that only seven (7) varieties were highly resistant, nine (9) were highly susceptible and the remaining thirty six (36) varieties were neither resistant nor susceptible (intermediate) to aphids attack. Five (5) varieties were selected from the two extremes for multiple crosses to raise F 1 , backcrosses and F 2 populations in which three (3) varieties including Danila, IT98K-131-2 and IT98K-1092-1 were among highly resistant and two (2) varieties including Aloka L and IT98K-1263 were among the highly susceptible varieties, Nine (9) progenies were obtained for F 1 generation from which only five (5) were found to be resistant to aphids attacks while four (4) were susceptible, Out of the nine (9) backcross populations, six (6) progenies were found to be resistant while the remaining three (3) were susceptible. From the nine (9) F 2 progeny obtained, six (6) were also found to be resistant while three (3) were susceptible. The investigation revealed that crossing susceptible with resistant varieties of cowpea yields progenies that are highly resistant. This is an indication that the gene for resistance is highly heritable.

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Inheritance of Resistance to Aphid in Cowpea¹

Abstract: Evaluation of 40 new CMD-resistant genotypes and three checks Location: Nigeria Starch Mill (NSM), Akwa Varieties

Cited by 43 publications

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Pattern and rate of within-field dispersal and bionomics of the cowpea aphid, Aphis craccivora (Aphididae), on selected cowpea cultivars

Pattern and rate of within-field dispersal and bionomics of the cowpea aphid, Aphis craccivora (Aphididae), on selected cowpea cultivars

Inheritance of partial resistance to Myzus persicae in lettuce

Screening for Development of Host Plant Resistance to Infestation by Aphid (<em>Aphis Craccivora</em> Koch) in Cowpea (<em>Vigna Unguiculata</em> [L] Walp)

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