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Laboratory studies of non‐preference resistance to cabbage root fly in radish
Author(s) -
ELLIS P. R.,
HARDMAN J. A.,
CRISP P.,
JOHNSON A. G.
Publication year - 1976
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1976.tb01731.x
Subject(s) - biology , cultivar , attractiveness , preference , pest analysis , resistance (ecology) , horticulture , agronomy , botany , psychology , economics , microeconomics , psychoanalysis
SUMMARY First generation progenies selected from four radish cultivars on the basis of their attractiveness to ovipositing cabbage root fly in the laboratory were compared in the same environment. There were significant differences between and within cultivars in their attractiveness for egg‐laying, indicating that genetic variation existed and that selection had effected a heritable change. However, inconsistencies between experiments indicated that other, as yet unquantified, factors were compounded with the heritable component of non‐preference resistance. There was no evidence to suggest that seed weight, leaf area, or hypocotyl size affected the attractiveness of the plants. The effects of eliminating any choice between selections was investigated in the laboratory by exposing 4‐wk‐old ‘high’ and ‘low’ preference selections of cv. Asmer Tip Top to the pest for 6 days. Three times as many eggs were laid on ‘high’ than on ‘low’ preference selections, indicating that the heritable non‐preference resistance to cabbage root fly in Asmer Tip Top was maintained when no choice was offered to the flies, an essential requirement for ‘resistant’ cultivars in the field.