New Robertsonian Translocation Chromosomes in Captive Thai Gaur (Bos gaurus readei)

Kakampuy, Wanpen; Tanomtong, Alongklod; Chaveerach, Arunrat; Sangpakdee, Wiwat

doi:10.3923/pjbs.2007.2185.2191

Cited by 4 publications

(1 citation statement)

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“…In 1964 Ingemar Gustavsson was the first who worked on clinical cytogenetic in animals and found first time 1/29 robertsonian translocation in cattle. Some abnormalities include robertsonian translocation in captive Thai Gaur (Chaveerach et al, 2007), in Veitnamese cattle (Tanaka et al, 2000), pericentric inversion of chromosomes and chimeric karyotypes in cattle and buffalo, sex chromosomes reciprocal translocation including XX translocation in Mehsana buffalo (Patel et al, 2006) and bovine freemartin syndrome. Aneuploidy, polyploidy, fragile sites and deletions were observed in cattle (El-Bayomi et al, 2011) Livestock populations have been extraordinarily improved in the last 40 years through cytogenetic screening (Ducos et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Cytogentic Screening Related to Infertility Problems in Nili-Ravi Buffalo in Punjab

Dawood¹

2014

Adv. Anim. Vet. Sci.

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Section: Introductionmentioning

confidence: 99%

Cytogentic Screening Related to Infertility Problems in Nili-Ravi Buffalo in Punjab

Dawood¹

2014

Adv. Anim. Vet. Sci.

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Robertsonian Translocation [56,XX and 57,XY,rob(1;29)] in Captive Thai Gaur (Bos gaurus readei) by Conventional, GTG-Banding, CBG-Banding and Ag-NOR Banding Techniques

et al. 2011

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SummaryRobertsonian translocation, or centric fusion, which is known to be the most common mechanism in karyotype evolution of bovid species, was observed and described in captive Thai gaur (Bos gaurus readei). Blood samples were taken from 2 male and 2 female captive Thai gaur. After the standard whole blood lymphocyte culture in the presence of colchicine, the metaphase spreads were performed on microscopic slides and air-dried. Conventional staining, GTG-banding, CBGbanding and Ag-NOR banding techniques were applied to stain the chromosomes. The number of diploid chromosomes (2n) were 57 in 2 males and 56 in 2 females instead of the normal 2nϭ58. The fundamental number (NF) was 62 in both the 2 males and 2 females. The autosome consists of 3 submetacentric and 52 telocentric chromosomes in males, and 4 submetacentric and 50 telocentric chromosomes in females. The X chromosome was a large submetacentric chromosome and the Y chromosome was the smallest metacentric chromosome. Eight telocentric chromosomes and 2 submetacentric chromosomes (5 autosome pairs) were identified as satellite chromosomes which showed clearly observable nucleolar organizer regions (NORs). The presence of an extra submetacentric chromosome and the loss of 2 telocentric chromosomes [57,XY,rob(1;29)] were observed in both males. Also, the presence of 2 extra submetacentric chromosomes and the loss of 4 telocentric chromosomes [56,XX,rob(1;29)] were observed in both females. Results from the GTGbanding and CBG-banding techniques analyses confirmed that the 2 autosomes of male (2nϭ57) and 4 autosomes of female (2nϭ56) involved in the translocation are the chromosome pairs 1 and 29, which are common in translocation of the bovid species.

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Karyotype analysis of mithun (Bos frontalis) and mithun bull x Brahman cow hybrids

Qu¹,

He²,

Nie³

et al. 2012

Genet. Mol. Res.

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ABSTRACT. We examined the cytogenetics of mithun (Bos frontalis), a domesticated version of the Asian gaur, and hybrids (F 1 generation) produced by artificial insemination of Brahman cows (Bos indicus) with mithun semen. Reproductive potential was also examined in the F 1 generation and a backcrossed heifer for utilization of heterosis. Metaphase chromosome spreads were examined by conventional staining and fluorescence in situ hybridization hybridized with the entire chromosome 1 of mithun as a specific probe. Chromosome 1 of mithun was found to be equivalent to Bos taurus chromosomes 2 and 28. The karyotype of the female mithun (N = 4) comprised 58 chromosomes, including 54 acrocentric and four large submetacentric chromosomes, without the four acrocentric chromosomes found in the domesticated species B. indicus. However, one of the four female mithuns with a normal mithun phenotype had an abnormal karyotype (2n = 59), indicating introgression from B. taurus or B. indicus. The F 1 karyotypes (N = 6, 3♂3♀) of the mithun bull × Brahman cow cross had 2n = 59, intermediate between their parents; they were consistent heterozygous carriers with a centric fusion involving rob(2;28), as expected. Two pronounced red signals were seen in the mithun karyotypes, three red signals in the mithun × Brahman hybrids, and four red signals in the Brahman cattle, in good agreement with centric fusion of bovine rob(2;28). The female backcross hybrid (N = 1) with 2n = 59 had a similar chromosome configuration to the F 1 karyotypes and had rob(2;28). Such female backcross hybrids normally reproduce; however, the F 1 bulls (N = 3)had not yet generated normal sperm at 24 months.

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New Robertsonian Translocation Chromosomes in Captive Thai Gaur (Bos gaurus readei)

Cited by 4 publications

References 35 publications

Cytogentic Screening Related to Infertility Problems in Nili-Ravi Buffalo in Punjab

Cytogentic Screening Related to Infertility Problems in Nili-Ravi Buffalo in Punjab

Robertsonian Translocation [56,XX and 57,XY,rob(1;29)] in Captive Thai Gaur (Bos gaurus readei) by Conventional, GTG-Banding, CBG-Banding and Ag-NOR Banding Techniques

Karyotype analysis of mithun (Bos frontalis) and mithun bull x Brahman cow hybrids

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