Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/15396
ชื่อเรื่อง: Karyotype evolution and geographical distribution of the Thai‐medaka, Oryzias minutillus, in Thailand
ผู้แต่ง: Magtoon W.
Nadee N.
Higsdhitani T.
Takata K.
Uwa H.
วันที่เผยแพร่: 1992
บทคัดย่อ: The karyotype of Oryzias minutillus was examined with specimens collected from 18 localities in Thailand. Specimens from the south and the northeast had 2n = 42 acrocentric chromosomes; the arm number (NF) was 42 and NORs‐chromosomes were acrocentric type (2n = 42, NF = 42, NORs‐A). Specimens from the central and the north were characteristic by having 8‐12 large metacentric chromosomes (LM‐chromosomes). They had 2n = 28–34 chromosomes, and shared the same NF and NORs‐chromosomes of submetacentric type (2n = 34‐28, NF = 44, NORs‐SM). Specimens from the southeast had 2n = 42 or 40 chromosomes. Their karyotypes had the same NF and NORs‐chromosomes as those from the central and the north (2n = 40–42, NF = 44, NORs‐SM), though they had no, or only one pair of, LM‐chromosomes. The karyotype with 42 acrocentric chromosomes seems to be basic for O. minutillus, and consequently those with NORs‐SM and LM‐chromosomes seem to be caused through pericentric inversion and centric fusion, respectively. We confirmed that the karyotype evolution had occurred in drainage areas of the Mae Nam Chao Phraya and collaterals (the central, north and southeast). On the other hand, the basic karyotype was preserved allopatrically in the peninsula (the south) and the basin of the Mae Nam Mun, a tributary of the Mekong (the northeast). Copyright © 1992, Wiley Blackwell. All rights reserved
URI: https://ir.swu.ac.th/jspui/handle/123456789/15396
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84986440287&doi=10.1111%2fj.1095-8649.1992.tb02676.x&partnerID=40&md5=7e40caca140450b12e3c71998f30a5c6
ISSN: 221112
Appears in Collections:Scopus 1983-2021

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