THE EVOLUTIONARY HISTORY OF DROSOPHILA-BUZZATII .16. FITNESS COMPONENT ANALYSIS IN AN ORIGINAL NATURAL-POPULATION FROM ARGENTINA

被引：32

作者：

HASSON, E

VILARDI, JC

NAVEIRA, H

FANARA, JJ

RODRIGUEZ, C

REIG, OA

FONTDEVILA, A

机构：

[1] G.I.B.E. Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires, 1428, Ciudad Universitaria

[2] Lab Genética, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires, 1428, Ciudad Universitaria

[3] Departamento de Genética, Universidad Autónoma de Barcelona, Barcelona, 08193, Bellaterra

来源：

JOURNAL OF EVOLUTIONARY BIOLOGY | 1991年 / 4卷 / 02期

关键词：

FITNESS; NATURAL POPULATIONS; DROSOPHILA; CHROMOSOMAL POLYMORPHISM; ENDOCYCLIC SELECTION;

D O I：

10.1046/j.1420-9101.1991.4020209.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The adaptive significance of the chromosomal polymorphism of Drosophila buzzati has been studied by means of fitness component analysis in an original population from Argentina. The results show evidence of selection acting through pupal viability, longevity (adult viability) and fecundity on the second chromosome polymorphism, and through pupal viability and virility on the fourth chromosome polymorphism. Changes in chromosomal inversion frequencies throughout the life-cycle suggested an endocyclic pattern of directional selection, which at first seems to be the only detectable mechanism responsible for the maintenance of the polymorphism. However, slow, long-term frequency changes cannot be ruled out. The way in which endocyclic selection acts on this population is different from that in a colonized population previously studied; that is, different fitness components are involved in the maintenance of chromosomal polymorphism. The possible factors that may explain these differences are discussed.

引用

页码：209 / 225

页数：17