A host shift of diamondback moth from crucifers to peas：Life history traits and genetic mechanisms
The diamondback moth(DBM)iS a well-known specialist on cruciferous plants.However，in 2001，a host shift to commercially-grown sugar pea was reported from Kenya. To study this phenomenon further，we compared five laboratory strains，including the pea-adapted strain from Kenya(DBM-P). In feeding trials on cabbage and pea，DBM-P larvae performed comparably well on the two hosts，whereas larvae of the other strains could not survive on pea. The genetic diversity within and between 10-12 individuals of the five strains was investigated using microsatellites and AFLPs.Statistical analyses of the AFLP data revealed hish genetic diversity between(FST=0.297)and within the strains. To study the inheritance of“pea-feeding，we conducted single pair matings between DBM-P strain and a cabbage-adapted strain followed by a backcross to either the cabbage(BC Ⅰ)or the pea-adapted(BCⅡ)strain or by intercrossing the F1 to produce an F2. The results suggest recessive genes to be responsible for the trait“feeding ability on pea.
Kathrin Janssen Annette Reineke Jan A.Scheirs Claus P.W.Zebitz David G.Heckel
Max-Planck-Institute for Chemical Ecology,Department of Entomology,Hans Kn(o)ll Str.8,07745 Jena,Ger Forschungsanstalt Geisenheim,Institute for Biology,Department for Phytomedicine,65366 Geisenheim,Ger University of Hohenheim,Institute for Phytomedicine,Department for Applied Entomology,70597 Stuttgar
国际会议
北京
英文
55-62
2006-10-24（万方平台首次上网日期，不代表论文的发表时间）