Open AccessComparisons of the inversion polymorphism in three Danish populations of the midge Chironomus plumosus L. (Diptera: Chironomidae)
Author(s) -
PEDERSEN BO VEST
Publication year - 1978
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1978.tb01270.x
Subject(s) - midge , chironomidae , biology , loss of heterozygosity , chromosomal polymorphism , chromosomal inversion , danish , heterozygote advantage , zoology , genetics , larva , polymorphism (computer science) , ecology , karyotype , allele , chromosome , gene , linguistics , philosophy
The chromosomal polymorphism in three Danish lake populations of the midge Chironomus plumosus L. was followed during a period of nearly three years. The populations exhibited differences in the composition of the chromosomal polymorphism and in the level of heterozygosity (= number of inversion heterozygotes per individual). The frequencies of larvae with a certain paracentric inversion located in the largest of the chromosomes showed remarkable differences between the three populations. In one of the lakes, in addition to a large frequency of larvae with this inversion, specimens heterozygous for the inversion were in great excess compared to the Hardy‐Weinberg distribution. The frequency of the heterozygote varied during the year. The adjustments of the chromosomal polymorphism to the environments are discussed.