Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/14491
ชื่อเรื่อง: Genetic divergence in the snorkel snail, Rhiostoma housei, a species complex in Thailand (Caenogastropoda: Cyclophoridae)
ผู้แต่ง: Prasankok P.
Tongkerd P.
Sutcharit C.
Panha S.
Keywords: allele
allopatry
allozyme
electrokinesis
fragmentation
frequency analysis
gel
gene flow
genetic differentiation
heterozygosity
snail
Thailand
Caenogastropoda
Cyclophoridae
Gastropoda
Rhiostoma
วันที่เผยแพร่: 2011
บทคัดย่อ: Allozyme variation was examined in 292 samples of the snorkel snail, Rhiostoma housei, collected from 12 localities within four regions of Thailand. Ten allozyme loci were screened across all the samples using horizontal starch gel electrophoresis, and eight of these loci, from eight enzyme systems, were found to be polymorphic. Within these eight loci the expected heterozygosity (Hexp) was moderate to high ranging from 0.015 to 0.148 with an overall mean of 0.081 ± 0.041, whilst a high genetic heterogeneity among samples was found (Fst = 0.798). R. housei exhibited a weak pattern of isolation by distance over the entire tested species range in Thailand. The high Fst and moderate to high Hexp suggest gene flow amongst populations is partially restricted resulting in fragmentation into local gene pools. Based on allele frequencies and an allozyme dendrogram, six groups were identified, and these entities may represent separate biological species. The large values of genetic distances and fixed allelic differences obtained for each combination of allopatric samples imply the presence of cryptic species under the name R. housei. © 2011 Elsevier Ltd.
URI: https://ir.swu.ac.th/jspui/handle/123456789/14491
https://www.scopus.com/inward/record.uri?eid=2-s2.0-80054948290&doi=10.1016%2fj.bse.2011.08.005&partnerID=40&md5=99ca0368b117f7e99cd2c5929f157cc0
ISSN: 3051978
Appears in Collections:Scopus 1983-2021

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