Chromosomal evolution in cervidae

Fontana, Francesco; Rubini, Michele

doi:10.1016/0303-2647(90)90008-o

Cited by 95 publications

(103 citation statements)

References 37 publications

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“…As far as we know, while fusions are widely occurring both inter and intraspecifically and, actually, often appear to accompany cladogenesis (Craddock 1972, 1975, White 1980, Redi and Capanna 1988, Fontana and Rubini 1990, fissioned karyotypes within a species, and also between species, are rather rare and their evolutionary relevance is not really clear (White 1980). For Phasmatodea, Craddock (1972Craddock ( , 1975 suggests a possible evolutionary trend of karyotype repatterning toward decreasing chromosome size and number.…”

Section: Discussionmentioning

confidence: 99%

The Chromosome Complement of the Hybrid Bacillus whitei Complex(Insecta Phasmatodea). II. The repatterned cytotypes.

1992

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Section: Discussionmentioning

confidence: 99%

The Chromosome Complement of the Hybrid Bacillus whitei Complex(Insecta Phasmatodea). II. The repatterned cytotypes.

1992

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“…Cytogenetics and molecular phylogenetics have contributed greatly to the knowledge of the evolutionary complexity of deer family Cervidae (Neitzel, 1987;Fontana and Rubini, 1990), particularly those of the genus Mazama (Mammalia; Cervidae), a group of small to medium-sized forest deer with spike-like antlers from Central and South America, characterized by their phenotypic homogeny in the presence of a polyphyletic origin (Gilbert et al, 2006;Duarte et al, 2008). Some cytogenetic studies have demonstrated very complex processes of chromosome evolution, being more intense in the reddish brocket group (Mazama americana, M. nana and M. bororo) than in grayish brockets (M. gouazoubira and M. nemorivaga).…”

Section: Introductionmentioning

confidence: 99%

Different responses to doxorubicin-induced chromosome aberrations in Brazilian deer species

Vargas-Munar

Sarria-Perea²,

Duarte³

2010

Genet. Mol. Res.

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ABSTRACT. The tendency toward chromosome fragility is one of the theories that may explain chromosome variation in brocket deer species (genus Mazama). We tested doxorubicin as an inducer of chromosome aberrations in lymphocytes of three brocket deer species, Mazama gouazoubira, M. americana and M. nana, compared to the marsh deer, Blastocerus dichotomus. Doxorubicin, at a concentration of 0.25 µg/mL, induced chromosome aberrations and fragile sites in all four species; the highest frequencies were seen in M. gouazoubira; they were lowest in B. dichotomus and intermediate in M. americana and M. nana. These results were expected based on previous karyotypic studies, but they failed to explain the higher sensitivity seen in M. gouazoubira. This may be because not all the aberrations and fragile sites are related to chromosome evolution in brocket deer; other factors, such as environmental influences, may be involved in chromosome fragility.

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“…They are of great interest to evolutionary biologists and cytogeneticists because of the considerable diversity of their karyotypes, despite their morphological similarity (Fontana and Rubini 1990). The Indian muntjac, Muntiacus muntjak, possesses the lowest diploid chromosomal number in mammals (2n ϭ 6 for females [F] and 7 for males [M]) (Wurster and Benirschke 1970;Wurster and Atken 1972;Shi 1976), whereas the Chinese muntjac (Muntiacus reevesi) has a 2n number of 46 in both sexes (Wurster and Benirschke 1967).…”

Section: Introductionmentioning

confidence: 99%

Rapid and Parallel Chromosomal Number Reductions in Muntjac Deer Inferred from Mitochondrial DNA Phylogeny

Wang¹,

Li²

2000

Molecular Biology and Evolution

104

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Muntjac deer (Muntiacinae, Cervidae) are of great interest in evolutionary studies because of their dramatic chromosome variations and recent discoveries of several new species. In this paper, we analyze the evolution of karyotypes of muntjac deer in the context of a phylogeny which is based on 1,844-bp mitochondrial DNA sequences of seven generally recognized species in the muntjac subfamily. The phylogenetic results support the hypothesis that karyotypic evolution in muntjac deer has proceeded via reduction in diploid number. However, the reduction in number is not always linear, i.e., not strictly following the order: 46→14/13→8/9→6/7. For example, Muntiacus muntjak (2n ϭ 6/7) shares a common ancestor with Muntiacus feae (2n ϭ 13/14), which indicates that its karyotype was derived in parallel with M. feae's from an ancestral karyotype of 2n Ն 13/14. The newly discovered giant muntjac (Muntiacus vuquangensis) may represent another parallel reduction lineage from the ancestral 2n ϭ 46 karyotype. Our phylogenetic results indicate that the giant muntjac is relatively closer to Muntiacus reevesi than to other muntjacs and may be placed in the genus Muntiacus. Analyses of sequence divergence reveal that the rate of change in chromosome number in muntjac deer is one of the fastest in vertebrates. Within the muntjac subfamily, the fastest evolutionary rate is found in the Fea's lineage, in which two species with different karyotypes diverged in around 0.5 Myr.

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Chromosomal evolution in cervidae

Cited by 95 publications

References 37 publications

The Chromosome Complement of the Hybrid Bacillus whitei Complex(Insecta Phasmatodea). II. The repatterned cytotypes.

The Chromosome Complement of the Hybrid Bacillus whitei Complex(Insecta Phasmatodea). II. The repatterned cytotypes.

Different responses to doxorubicin-induced chromosome aberrations in Brazilian deer species

Rapid and Parallel Chromosomal Number Reductions in Muntjac Deer Inferred from Mitochondrial DNA Phylogeny

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