Introducing the 2023 Polled Edition – The Brahman Journal
2023年2月10日 · Homozygous for the polled condition refers to a bull carrying two copies of the polled gene. Because the polled condition is a dominant trait, some polled bulls can be heterozygous and carry one copy of the polled gene and one copy of the horned gene.
Polled Genetics and Simple Inheritance Explained - Australian Brahman …
2011年9月5日 · Homozygote polled sires provide a more rapid rate of infusion of the polled gene into a Brahman herd, with 99% polled/scurred progeny when mated with horned cows compared to just 45% polled/scurred progeny from the same matings using a sire with only one copy of the polled allele (heterozygote).
Polled vs. Horned | Veterinary Genetics Laboratory - UC Davis
Investigation of the polled mutation in Brahman cattle revealed the segregation of the Celtic polled variant (Pc) in the breed. Polledness is dominant; a polled animal can have one or two copies of the polled alleles. All offspring of a homozygous polled bull (2 of the same polled allele, Pc/Pc or Pf/Pf) will be polled.
Basic Genetics - Australian Brahman Breeders Association
2009年3月7日 · The allele for polled (P) is dominant to the horned allele (p) although the dominance is apparently not complete and sex linked modifying genes can also intervene (eg scurs). Polled v’s horned trait shows how alleles interact in a trait with dominance. Bull (a) is homozygous dominant which means it has two polled alleles (PP).
Weekly genetics review: Brahman Poll genetics are different
2017年7月25日 · A MORE precise DNA test to identify homozygous (PP) polled cattle in Brahman and Brahman derived breeds could result from recent work by researchers at the University of Queensland. The project also aims to develop DNA tests for scurs in Brahmans.
Homozygous polled sires provide a more rapid rate of infusion of the polled gene into a Brahman herd, with >85% polled/scurred progeny when mated with horned cows compared to 50% polled/scurred progeny using a heterozygous sire.
Characterization of the poll allele in Brahman cattle using long …
2020年4月22日 · Oxford Nanopore Technologies’ minION sequencer was used to sequence four homozygous poll (P c P c), four homozygous horned (pp), and three heterozygous (P c p) Brahmans to characterize the poll allele in Brahman cattle. A total of 98 Gb were sequenced and an average coverage of 3.33X was achieved.
Strong Result For Brahmans In New Poll Gene Marker Test
2011年9月5日 · Australian Brahman Breeders Association general manager John Croker said the test would add considerable value to Brahman seedstock animals tested as homozygous polls. Leading genetics consultant Don Nicol recently speculated on Beef Central that all other things being equal, a homozygous polled Brahman displaying desirable EBVs and breeding ...
Thoughts from Polled Brahaman Breeders – The Brahman Journal
2023年2月12日 · The ability to identify homozygous animals allows for much more out-crossing, and thus will create a more diverse, improved polled gene pool. Homozygous cattle are in demand, and the price usually reflects that. If your resources don’t allow for that, you can still add polled genetics to your herd.
Rockley Red Brahman Genetics - About the Genetic Program
A homozygous POLLED bull with strong head, clean underline, abundance of length and width and a quiet temperament. His sire has produced very consistent progeny and he was collected at 19 months of age.