GENETIC RELATIONSHIPS BETWEEN LINEAR TYPE TRAITS, MILK YIELD AND OPEN DAY IN HOLSTEIN COWS OF IRAN

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BAKHTIARIZADEH M.R.; MORADI SHAHRBABAK M.; PAKDEL A.; MOGHIMI A.

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Journal: Iranian Journal of Animal Science Year:2010 | Volume:40 | Issue:4 Page(s): 13-19

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Title

GENETIC RELATIONSHIPS BETWEEN LINEAR TYPE TRAITS, MILK YIELD AND OPEN DAY IN HOLSTEIN COWS OF IRAN

Author(s)

BAKHTIARIZADEH M.R. | MORADI SHAHRBABAK M. | PAKDEL A. | MOGHIMI A. | Issue Writer Certificate

Keywords

TYPE TRAITSQ3

MILK PRODUCTIONQ2

FERTILITYQ2

Abstract

The objective of the present study was to estimate the relationship between genetic parameters for 13 linear TYPE TRAITS, and milk yield as well as open day in Holstein cattle of Iran. Three data sets of: 16502 (TYPE TRAITS), 16557 (milk yield) and 11631 (open days) records related to the first calving of the cows, and respectively taken from 1500, 1566, and 2000 herd-year-season groups, were taken into account. SAS software and Proc GLM were employed to fit the model. Genetic parameters were estimated using Restricted Maximum Likelihood along with an animal model and ASREML software. Genetic correlation among TYPE TRAITS and MILK PRODUCTION ranged from 0.34 (rear udder width) to -0.31 (udder depth), and among TYPE TRAITS and FERTILITY, it ranged from 0.62 (rear udder width) to -0.37 (udder depth). Most of the genetic correlations between MILK PRODUCTION and FERTILITY indicate that more production in cows was accompanied by a lower FERTILITY, while cows with a lower production level benefitted from a more FERTILITY rate.

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APA: Copy

BAKHTIARIZADEH, M.R., MORADI SHAHRBABAK, M., PAKDEL, A., & MOGHIMI, A.. (2010). GENETIC RELATIONSHIPS BETWEEN LINEAR TYPE TRAITS, MILK YIELD AND OPEN DAY IN HOLSTEIN COWS OF IRAN. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 40(4), 13-19. SID. https://sid.ir/paper/193578/en

Vancouver: Copy

BAKHTIARIZADEH M.R., MORADI SHAHRBABAK M., PAKDEL A., MOGHIMI A.. GENETIC RELATIONSHIPS BETWEEN LINEAR TYPE TRAITS, MILK YIELD AND OPEN DAY IN HOLSTEIN COWS OF IRAN. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2010;40(4):13-19. Available from: https://sid.ir/paper/193578/en

IEEE: Copy

M.R. BAKHTIARIZADEH, M. MORADI SHAHRBABAK, A. PAKDEL, and A. MOGHIMI, “GENETIC RELATIONSHIPS BETWEEN LINEAR TYPE TRAITS, MILK YIELD AND OPEN DAY IN HOLSTEIN COWS OF IRAN,” IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 40, no. 4, pp. 13–19, 2010, [Online]. Available: https://sid.ir/paper/193578/en

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