Type traits of ayrshire cows in different regional populations and their relationship with milk production
https://doi.org/10.31043/2410-2733-2019-2-17-23
Abstract
The main selection and genetic parameters of the linear and classification traits of the exterior of 1,438 first calving cows of the Leningrad, Kirov and Vologda regions of the Russian Federation. Most variable indicators were "udder cleft" in all three populations (30.65; 36.67; 30.47 %) and "body depth" in the Vologda and Leningrad populations - 35.57 and 23.40 %, respectively. The “rump width” in the Vologda population at Cv = 41.6% had a rather low absolute score (2.31 ± 0.08 points), therefore more careful selection is needed. The soft pasterns (26.8%), additional teats (26.2%), and slack back (8.3%) were the most common deficiencies. Less common were a peaked rump (6.2%), a high-set tail (4.8%), and a pterygoid scapula (4.1%). The construction of linear profiles of bulls Geyser, Lepa, Landskape using the standard transmission ability (STA) for each linear and classification types was carried out. The largest positive correlation values of the rear udder width (0.30, P≤0.001), front length udder (0.24, P≤0.001), body depth (0.12, P≤0.001) and dairy form (0, 10, P≤0,001). Reliability negative relationship between the corner rump and milk yield -0.09 (P≤0.001).
About the Authors
E. Smotrova
Russian Research Institute of Farm Animal Genetics and Breeding — branch of the L. K. Ernst Federal Science Center for Animal Husbandry
Russian Federation
Russian Federation
Smotrova E. — Junior Researcher
St. Petersburg, p. Tjarlevo, Moskovskoe shosse, 55a, 196601
N. Abramova
North-West research Institute of dairy and grassland agriculture
Russian Federation
Russian Federation
Abramova N. — PhD (Agr. Sci), the Vedas. scientific et al.
Vologda, p/o Molochnoe, Lenina st., 14, 160555
V. Berezina
«Kirovskoe» Pedigree Enterprise for Breeding Work («Kirovplem» JSC)
Russian Federation
Russian Federation
Berezina V. — chief livestock specialist — responsible for classification of the Department of Regional Information and Breeding Center
Kirov, Leninsky district, Zakharishchevy village, 610051
E. Krysova
«Kirovskoe» Pedigree Enterprise for Breeding Work («Kirovplem» JSC)
Russian Federation
Russian Federation
Krysova E. — Head of the Department of Regional Information and Breeding Center
Kirov, Leninsky district, Zakharishchevy village, 610051
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Review
For citations:
Smotrova E., Abramova N., Berezina V., Krysova E. Type traits of ayrshire cows in different regional populations and their relationship with milk production. Genetics and breeding of animals. 2019;(2):17-23. (In Russ.) https://doi.org/10.31043/2410-2733-2019-2-17-23
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