Indian Society of Genetics & Plant Breeding

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Inheritance of resistance to bud fly infestation in linseed (Linum usitatissimum L.)

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Genetic analysis was carried out to determine the mode of
inheritance of resistance to bud fly which is a key pest of
linseed during flowering stage. Parents, F1, F2, BC1 and BC2
populations of three crosses involving two resistant, IC
15888 and JRF4 and two susceptible parents, viz., Neelum
and GS-41 were the experimental materials. Reaction to
bud fly in F1s of all the three crosses indicated that
resistance was dominant over susceptibility. The F2 and
back cross segregants were categorized in to resistant and
susceptible classes based on per cent bud infestation. The
genetic analysis in F2 generation revealed that two
dominant complementary genes in IC 15888 control the
bud fly resistance, while JRF 4 carried a single dominant
gene for resistance. The F2 results were confirmed by genetic
analysis of back cross populations. It can be categorically
stated that the knowledge of number and nature of
resistance genes in IC 15888 and JRF4 will be valuable for
development of bud fly resistant varieties in linseed.

Keywords: Inheritance, resistance, bud fly, infestation, linseed

Info

Year: 2015
Volume: 75
Issue: 3
Article DOI: 10.5958/0975-6906.2015.00061.9
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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