Premium
SELECTION OF RESISTANCE STRAINS IN LIPOSCELIS BOSTRYCHOPHILA BADONNEL TO CO 2 ‐ENRICHED ATMOSPHERES *
Author(s) -
Wang Jinjun,
Zhao Zhimo,
Li Lungshu
Publication year - 1999
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.1999.tb00009.x
Subject(s) - biology , selection (genetic algorithm) , strain (injury) , resistance (ecology) , zoology , veterinary medicine , ecology , medicine , artificial intelligence , computer science , anatomy
Adults of the psocid Liposcelis bostrychophila Badonnel were exposed to atmospheres containing 35% and 55% CO 2 for 30 generations to select strains resistant to high CO 2 content (HCC). Selection pressure was maintained at around 70% of mortality. At the 30th generation, comparison of sensitivities between the selected strains (HCC 1 and HCC 2 ) and the original susceptible strain (MA‐S) revealed a resistance factor (RF) at the 50% mortality level (LT 50 ) of 4. 6‐and 5. 3‐folds, respectively. Throughout the selection process, log‐time against probit‐mortality lines remained roughly parallel and the slopes remained lower than that of MA‐S strain until the last generation. It is inplied that the genetic potential of L. bostrychophila to develop resistance to CO 2 was not exhausted until the 30th generation. Removal of selection pressure for 5 generations from 2 sub‐populations of two selected strains from the 25th generation caused significant reduction in resistance. In the absence of MAs exposure, the two selected strains (HCC 1 and HCC 2 ) possessed the fitness defect. HCC 1 and HCC 2 were calculated by R 0 to have a fitness value of 0. 52 and 0. 45 relative to MA‐S.