| variance component analysis of bristle characters in local populations of drosophila melanogaster. | the genetic variabilities of sternopleural and abdominal bristle numbers existing in local natural populations were assessed. using second chromosome lines of drosophila melanogaster extracted from three natural populations in japan (the ishigakijima, ogasawara and aomori populations), experiments were conducted to estimate the components of genetic variances, additive and dominance variances. the following results were obtained: for both sternopleural and abdominal bristle numbers, the additive ... | 1992 | 1304769 |
| the genetic structure of natural populations of drosophila melanogaster. xx. comparison of genotype-environment interaction in viability between a northern and a southern population. | in order to examine the operation of diversifying selection as the maintenance mechanism of excessive additive genetic variance for viability in southern populations in comparison with northern populations of drosophila melanogaster, two sets of experiments were conducted using second chromosomes extracted from the ogasawara population (a southern population in japan) and from the aomori population (a northern population in japan). chromosomal homozygote and heterozygote viabilities were estimat ... | 1987 | 3117620 |
| the genetic structure of natural populations of drosophila melanogaster. xxii. comparative study of dna polymorphisms in northern and southern natural populations. | restriction map variation in four gene regions (adh, amy, pu and gpdh) was surveyed for 86 second chromosomes from northern (aomori) and southern (ogasawara) japanese populations of drosophila melanogaster (43 chromosomes from each population). the regions examined cover a total of 62 kilobases. estimates of nucleotide diversity (pi) were approximately constant across the gene regions and populations examined. the distribution of restriction site polymorphisms was compatible with the expectation ... | 1991 | 1684329 |