A Robertsonian translocation, rob(2;28), found in Vietnamese cattle

Area of Science:

• Genetics
• Cytogenetics
• Animal Breeding

Background:

• Robertsonian translocations are chromosomal rearrangements common in cattle.
• Understanding chromosomal abnormalities is crucial for livestock breeding and conservation.
• Vietnamese Cattle represent a unique genetic resource in Southeast Asia.

Purpose of the Study:

• To identify and characterize chromosomal abnormalities in a local population of Vietnamese Cattle.
• To report the first instance of a Robertsonian translocation in Southeast Asian cattle.
• To investigate the nature of the identified translocation using advanced cytogenetic techniques.

Main Methods:

• Karyotyping using Q- and R-banding techniques.
• Fluorescence In Situ Hybridization (FISH) with a bovine satellite I DNA probe.
• Analysis of chromosome structure and centromeric heterochromatin.

Main Results:

• A new Robertsonian translocation, designated rob(2;28), was identified in a Vietnamese Cattle individual (2n = 59, XY).
• The animal was a heterozygous carrier of the centric fusion translocation involving chromosomes 2 and 28.
• FISH analysis indicated a reduced centromeric heterochromatin block in the rob(2;28) chromosome, suggesting a monocentric fusion.

Conclusions:

• This study reports the first identification of a Robertsonian translocation in Southeast Asian cattle.
• The characterized rob(2;28) translocation provides valuable genetic information for Vietnamese Cattle.
• The findings contribute to the broader understanding of chromosomal evolution and diversity in cattle populations.