Genetics of corn leaf aphid (Rhopalosiphum maidis) resistance in barley

A study was undertaken to determine the genetics of corn leaf aphid (CLA) resistance in barley under controlled conditions with artificial inoculation at adult plant stage. Inheritance of CLA resistance was investigated in five resistant barley genotypes (EB921, EB2507, Manjula, DL529 and K144) in c...

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Bibliographic Details
Published in:Cereal research communications 2011-03, Vol.39 (1), p.130-136
Main Authors: Verma, R. P. S, R. Malik, R. Kumar, S. S. Singh
Format: Article
Language:English
Subjects:
Agriculture
backcrossing
Barley
Breeding
Corn
corn leaf aphid
Dominant genes
Genetic inheritance
Genetic research
genetics
genotype
Hordeum vulgare
Infestation
inheritance
Inheritance patterns
Inoculation
leaves
Life Sciences
mature plants
Plant Breeding/Biotechnology
Plant Genetics and Genomics
Plant Physiology
Plants
resistance
Rhopalosiphum maidis
Segregation
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Summary:A study was undertaken to determine the genetics of corn leaf aphid (CLA) resistance in barley under controlled conditions with artificial inoculation at adult plant stage. Inheritance of CLA resistance was investigated in five resistant barley genotypes (EB921, EB2507, Manjula, DL529 and K144) in crosses with susceptible parent Alfa93 in F1, F2, F3 and backcross (BCF1) generations. The aphid inoculation was done using the brush method as well as the detached leaf method. Individual plants were classified in resistant, moderately resistant, susceptible and highly susceptible categories base on number per shoot as well as multiplication of CLA on any of the fresh, young leaf. The plants scored as resistant or moderately resistant were observed twice more at 10 days interval to confirm their reaction. Resistance was governed by a single dominant gene in EB921, DL529 and K144, while it was monogenic recessive in Manjula and EB2507. These diverse sources may be used in breeding for CLA resistance in barley improvement programme.
ISSN:0133-3720
1788-9170
DOI:10.1556/CRC.39.2011.1.13