| More info | Plus d'info | Mais info |
| Main ref. | |||||
| Country | USA |
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| Locality/Yr. | Chehalis River, Washington |
Sex. |
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| Chromosome number |
Haploid/gametic (n) : 24 |
Ref. |
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Diploid/zygotic (2n) : 48 - 48 |
Ref. |
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| Chromosome Type | Ref. |
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| Metacentric | 4 |
Subtelocentric |
14 |
MetaSubmetacentric |
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| Submetacentric | 10 |
Telocentric/Acrocentric |
20 |
Subtelo-Acrocentric |
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| Chromosome arm no. | 62 |
Ref. |
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| Sex determining mechanism | Ref. |
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| DNA Content (haploid) | Ref. |
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| Genetic markers |
No |
Ref. |
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| Remarks | Paper considered only metacentrics and submetacentrics as biarmed. NORs situated in the telomeric regions of the shorter arms of the largest and smallest subtelocentric pairs. Four additional CMA3-positive (butsilver negative) sites were also present. Results of FISH (rDNA probe) suggest that all CMA3-positive sites represent rDNA cistrons. C-positive blocks of heterochromatin are situated primarily in the short arms of biarmed chromosomes. Karyotype may be derived from that of the hypothetical esocoid ancestor (with 2n = 48, FN = 48) by pericentric inversions and amplifications of NOR sites (Ref. 45779). |
Ref. |
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