Genetic Relationships and Additive Genetic Variation of Productive and Reproductive Traits in Guernsey Dairy Cattle,
نویسندگان
چکیده
منابع مشابه
Genetic and Phenotypic Trends of Productive and Reproductive Traits in Iranian Holstein Dairy Cattle of Isfahan Province
Productive and reproductive traits have great importance in international dairy cattle breeding objectives. Production, reproduction (days open and calving interval) and pedigree data of Iranian Holstein dairy cattles were collected between 2002 and 2012 from 47 herds in Isfahan province. The data set consisted of 30179 records from 18837 registered IranianHolstein dairy cattles. Single trait r...
متن کاملGenetic Study of Dairy Cattle and Buffalo Bulls Based on Growth, Milk Production and Reproductive Traits
The present investigation aimed to conduct a genetic study of dairy cattle and buffalo bulls based on economic traits and their phenotypic correlation. The means of various economic traits in both the species are presented. Cattle bulls reported a better libido score, Flehmen response, requirement of mounting stimulus and semen volume, conception rate and expected predicted difference for milk ...
متن کاملGenetic relationships between detailed reproductive traits and performance traits in Holstein-Friesian dairy cattle.
The objective of the study was to estimate the genetic relationships between detailed reproductive traits derived from ultrasound examination of the reproductive tract and a range of performance traits in Holstein-Friesian dairy cows. The performance traits investigated included calving performance, milk production, somatic cell score (i.e., logarithm transformation of somatic cell count), carc...
متن کاملgenetic and trend evaluation of productive and reproductive traits of dairy cattle in razavi khorasan province by using multivariate analysis
in this study, data comprising 10479 production and reproduction records of razavi khorasan province's dairy cattle, were collected by animal breeding center of iran during 1986 to 2006, were used. genetic parameters were estimated by restricted maximum likelihood procedure using wombat software. genetic and phonotype trends were estimated via linear regression as means genetic and phonotype va...
متن کاملgenetic and phenotypic trends of productive and reproductive traits in iranian holstein dairy cattle of isfahan province
productive and reproductive traits have great importance in international dairy cattle breeding objectives. production, reproduction (days open and calving interval) and pedigree data of iranian holstein dairy cattles were collected between 2002 and 2012 from 47 herds in isfahan province. the data set consisted of 30179 records from 18837 registered iranianholstein dairy cattles. single trait r...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1987
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(87)80138-8