Gene-centromere distances of allozyme loci in even- and odd-year pink salmon, (Oncorhynchus gorbuscha).
We produced gynogenetic progeny families to estimate gene-centromere (G-C) distances of allozyme loci in even-year and odd-year pink salmon (Oncorhynchus gorbuscha). G-C distances of 37 loci distributed on a chromosome ranged from 1 cM at LDH-A1* to 49 cM at ADA-2*, DIA-2*, and sMDH-B1,2*. The distribution of the G-C distances along the chromosome arm was not even and appears telomeric. Eight loci in even-year and seven in odd-year showed high G-C distances (>45 cM), indicating that one crossover per chromosome arm is usual in pink salmon. Variation was observed in the results from different families; 14 loci out of 21 tested, showed heterogeneity. At mAH-3*, G-C distances from five odd-year families ranged from 6 to 37 cM; the widest range observed in this study. At isoloci such as sMDH-A 1,2* and sMDH-B1,2* the distances from different families were grouped into statistically discrete distributions, suggesting that it may be a reflection polymorphism at both isoloci. It appears G-C distances in salmonid species are well conserved with some minor differences.
Matsuoka
M P
MP
Juneau Center, School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, 11120 Glacier Highway, Juneau, AK 99801, USA. makoto.matsuoka@nrc-cnrc.ga.ca
Gharrett
A J
AJ
Wilmot
R L
RL
Smoker
W W
WW
D000818:Animals; D002503:Centromere / Q000235:genetics*; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D005260:Female; D005796:Genes; D018740:Genetic Heterogeneity; D014644:Genetic Variation; D007527:Isoenzymes / Q000235:genetics*; D008297:Male; D012474:Salmon / Q000235:genetics*
D007527:Isoenzymes