Variation in ligand-accessible genome size and its ecomorphological correlates in a pond snail

Vinogradov, A.E.

Автор: Vinogradov A.E.
Журнал: Hereditas
Том: 128
Номер: 1
Год издания: 1998
Издательство: Blackwell Publishing Inc.
Местоположение издательства: United Kingdom
Первая страница: 59
Последняя страница: 65
DOI: 10.1111/j.1601-5223.1998.00059.x
Аннотация: Genome size was assessed by flow cytometry with DNA-specific fluorescent ligand olivomycin in six populations of a snail Viviparus contectus (Gastropoda, Viviparidae). Shell and aperture sizes were recorded for the same animals. It was found that across all the populations the relative aperture size (residuals of aperture/shell size regression) was negatively correlated with the ligand-accessible genome size (LA_GS). The effect was mainly due to interpopulation differences and seemed to be associated with the relative abundance of other gastropod molluscs. The populations inhabiting ponds where V. contectus occurred alone, showed higher LA_GS and lower relative aperture size. In a population from the pond where V. contectus was most rare as compared with other gastropods, the reverse pattern was observed. In one of the six populations only, the effect was significant at the within-population level. In addition, average genome sizes were determined for 15 gastropod species. Genome of V. contectus was found to be the largest among non-terrestrial gastropods, which had significantly smaller genomes than terrestrial molluscs. The findings are discussed in relation to the possible role of redundant (noncoding) DNA, genome cytoecology, and evolution of genome size.
Добавил в систему: Виноградов Александр Евгеньевич

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Variation in ligand-accessible genome size and its ecomorphological correlates in a pond snailстатья