Genetic analysis of thrips resistance in cowpea (Vigna unguiculata [L.] Walp.)

Flower bud thrips, Megalurothrips sjostedti is the most severe field pest of cowpea that causes massive flower abortion which eventually results to substantial yield reduction in Africa. There is paucity of information on the mode of gene actions controlling inheritance of resistance to flower bud t...

Full description

Saved in:
Bibliographic Details
Published in:Euphytica 2017-09, Vol.213 (9), p.1, Article 216
Main Authors: Oladejo, A. S., Boukar, O., Fatokun, C. A., Obisesan, I. O.
Format: Article
Language:English
Subjects:
Agronomy
Analysis
Biomedical and Life Sciences
Biotechnology
Combining ability
Flow resistance
Flowering
Flowers
Genetic analysis
Genetic aspects
Genetic research
Genetic variability
Genetics
Genotype & phenotype
Genotypes
Germplasm
Heredity
Heritability
Hybrids
Inbreeding
Infestation
Life Sciences
Mating
Megalurothrips sjostedti
Parents
Peas
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant resistance
Plant Sciences
Thrips
Variance analysis
Vigna unguiculata
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Flower bud thrips, Megalurothrips sjostedti is the most severe field pest of cowpea that causes massive flower abortion which eventually results to substantial yield reduction in Africa. There is paucity of information on the mode of gene actions controlling inheritance of resistance to flower bud thrips in cowpea in the literature. The objectives of study were to assess the genetic variability for thrips resistance among the cowpea germplasm, determined the mode of inheritance of genes that conferred resistance and both broad and narrow-sense heritability estimates for the inheritance of thrips resistance in cowpea. Twelve cowpea lines were used in crosses in the screen house at IITA, Ibadan. The mating was accomplished using North Carolina design II to generate 48F 1 hybrids, which were eventually evaluated with the parents. Data on number of peduncles, number of pods and number of thrips per flower were recorded and subjected to analysis of variance using random model by SAS 9.2. Significant variability was observed for most agronomic and thrip-adaptive traits among the cowpea germplasm, parental-lines and F 1 genotypes evaluated. General combining ability (GCA) and specific combining ability (SCA) mean squares were significant (P 
ISSN:0014-2336
1573-5060
DOI:10.1007/s10681-017-2001-6