The chromosomes of tufted deer (Elaphodus cephalophus).
Mitotic and meiotic chromosome preparations of the tufted deer (Elaphodus cephalophus) were studied to elucidate the sex-chromosomal polymorphism evidenced by this species. Females had 2n = 46 or 47 chromosomes, whereas males had 2n = 47 or 48 chromosomes. An X;autosome translocation was identified by synaptonemal complex analysis of spermatocytes at pachytene and confirmed by the presence of a trivalent at diakinesis/metaphase I. The present work, in combination with earlier observations by others, indicates that E. cephalophus possesses a varied X-chromosome morphology involving an X;autosome translocation and addition of varying amounts of heterochromatin. It is speculated that sex-chromosome polymorphism may be responsible for the observed differences in diploid chromosome number of tufted deer.
Shi
L
L
Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences.
Yang
F
F
Kumamoto
A
A
D000818:Animals; D002871:Chromosome Banding; D002874:Chromosome Mapping; D003670:Deer / Q000235:genetics*; D007621:Karyotyping; D008540:Meiosis; D008938:Mitosis; D011110:Polymorphism, Genetic; D014178:Translocation, Genetic; D014960:X Chromosome / Q000648:ultrastructure