Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Effects of selection for early and late reproduction in low and high larval density populations of the bean weevil | Genet Sei Evol 1991 23 119-132 Elsevier INRA 119 Original article Effects of selection for early and late reproduction in low and high larval density populations of the bean weevil Acanthoscelides obtectus I Gliksman N Tucic . _. . . University of Belgrade Institute for Biological Research and Faculty of Science Yugoslavia Received 25 May 1990 accepted 30 November 1990 Summary - This study concerns an analysis of one-generation selection for early and late reproduction in populations maintained for 10 generations at low and high levels of larval density. We have obtained direct responses to selection in both the early and late reproducing parents. There was however no correlation between fecundity and longevity. Phenotypic responses suggest that parental age could change the fecundity schedule in the way predicted by antagonistic pleiotropy theory. However the absence of statistically detectable negative genetic correlation between early and late fecundities made our study inconclusive with respect to possible genetically based trade-off among fecundity indices. Acanthoscelides obtectus I larval density parental age effect fitness components Resume - Effets de la selection pour une reproduction précoce et tardive dans des populations de bruche du haricot Acanthoscelides obtectus a haute et faible densité larvaire. Cette étude concerne I analyse d une generation de selection pour une reproduction precoce ou tardive de populations maintenues pendant10 generations d une densité larvaire faible OU élevée. Nous avons obtenu des réponses directes à la selection chez les parents à reproduction précoce et à reproduction tardive. Il n y avait cependant pas de correlation entre la fecondite et la longévité. Les réponses phénotypiques suggèrent que 1 âge des parents pourrait modifier Involution de la ỊệcondỊté au Cours de la vie commele prédit la théorie de la pleiotropie antagonists cependant 1 absence de correlation negative statistiquement detectable entre les fecondites .
