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Genetic variability in antibiotic resistance to the greenbug Schizaphis graminum in Hordeum chilense
Author(s) -
Castro A. M.,
Martían L. M.,
Dixon A. F. G.
Publication year - 1995
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1995.tb00846.x
Subject(s) - biology , fecundity , aphid , heritability , genetic variability , aphididae , hordeum vulgare , botany , population , homoptera , antibiosis , agronomy , poaceae , pest analysis , genotype , genetics , bacteria , demography , sociology , gene
Hordeum chilense (Roem. et Schult), a native grass of South America, is a source of antixenotic and antibiotic resistance to the greenbug Schizaphis graminum Rondani. The genetic and environmental components of the variability in antibiotic resistance shown by H. chilense were determined by measuring the developmental time, the length of adult life, fecundity and intrinsic rate of population increase of green‐bugs reared on this host. The aphids belonged to a clone of biotype C. Plants were cloned to reduce the incidence of environmental variability. Different plant characters appeared to prolong aphid developmental time and reduce the length of adult life and total fecundity. The broad sense heritability and the genetic variability of these plant characters were different. The plant character that affected aphid development appears to differ from that affecting fecundity.