Genetic Relationships Among Traits Recorded at Registry Judgment, Reproductive Traits of Breeding Females and Carcass Traits of Fattening Animals in Japanese Black Cattle

Oyama, Kenji; Mukai, Fumio; Yoshimura, Toyonobu

doi:10.2508/chikusan.67.511

Cited by 19 publications

(26 citation statements)

References 13 publications

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“…The heritability estimation for AFC in this study correspond well with Oyama et al (2004) who reported that heritability estimation of AFC for Japanese black cattle was 0.20. However, this value was higher than those usually found in literature for tropical cattle.…”

Section: Age At First Calvingsupporting

confidence: 90%

“…Heritability estimations for reproductive traits of different beef cattle breeds have been reported by several studies (Oyama et al, 2004Borman et al, 2006Goyace and Guiterez, 2001). Oyama et al (2004) estimated heritability of reproductive performance in Japanese black cattle including age AFC, CI and days opens (DO) were 0.20; 0.05 and 0.05 respectively.…”

Section: Introductionmentioning

confidence: 93%

“…Oyama et al (2004) estimated heritability of reproductive performance in Japanese black cattle including age AFC, CI and days opens (DO) were 0.20; 0.05 and 0.05 respectively. Borman et al (2006) obtained heritability of pregnancy rate for Angus cattle was 0.13.…”

Section: Introductionmentioning

confidence: 99%

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Genetic Analysis of Reproductive Traits in Bali Cattle Maintained on Range Under Artificially and Naturally Bred

Gunawan

Sari

Parwoto³

2011

J. Indonesian Trop. Anim. Agric.

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The aim of this study was to evaluate genetic analysis including heritability and further phenotypic and genetic trends of reproductive traits in Bali cattle. Reproductive traits studied were age at first calving (AFC), calving interval (CI) and pregnancy rate (PR). Data of reproductive traits were collected from Breeding Centre of Bali Cattle, Denpasar-Bali at the year period of 2000-2007. To evaluate the genetic analysis, heritability were estimated using the Mixed Model Least Squares and Maximum Likelihood procedure. The phenotypic and genetic trends were calculated using regression equation. Estimation of heritability for AFC, CI and PR were 0.22, 0.41 and 0.40, respectively. The phenotypic trend of AFC, CI and PR decreased at an average rate of 1.70 month, 10.4 days and 0.75% per year, respectively. The same pattern was showed for genetic trends for AFC, CI and PR decreased at 0.38 month, 4.25 days and 0.30% per year respectively in the same period. The heritability of reproduction traits in Bali cattle were considered as moderate to high (0.22-0.41) which means that the selection program will be more effective and efficient in improving the genetic merits in Bali cattle.

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Section: Age At First Calvingsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 93%

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Genetic Analysis of Reproductive Traits in Bali Cattle Maintained on Range Under Artificially and Naturally Bred

Gunawan

Sari

Parwoto³

2011

J. Indonesian Trop. Anim. Agric.

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“…Using multivariate models, heritability values higher than those of this study in the first (0.16) and second (0.19) parity have been found, as well as between the third and ninth (0.17) parity and a heritability of 0.09 for the DO in subsequent parities (Goyache et al, 2005). Estimates of lower values (0.05) were published for the Japanese Black cattle (Oyama et al, 2004). An important component of DO is the length of postpartum anestrus, which has registered a moderate heritability (0.38) in Charolais cattle when the estimate was based on the days between calving and the first increase in blood progesterone; however, heritability index was reduced to 0.11 when it was estimated based on the first estrus observed (Mialon et al, 2001).…”

Section: Discussioncontrasting

confidence: 44%

Genetic parameters of days open in Charolais cattle of Cuba

Espinosa¹,

Peña

Espinoza

et al. 2016

Rev Colomb Cienc Pecu

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Parámetros genéticos de los días abiertos en ganado Charolais de Cuba Parâmetros genéticos dos dias vazios no gado Charolês de Cuba (Received: December 12, 2014; accepted: September 3, 2015) doi: 10.17533/udea.rccp.v29n1a02 Original Articles were considered. The WOMBAT program was used to estimate variance components. Three models were applied; an univariate model (UM) for each separate parity until the sixth calving; a repeatability model (RM) with all parities; and a random regression model (ARM) taking the number of calving as an independent variable. Results: the overall average for DO was 171 ± 93 days. The trend of the average value for DO in each calving was decreasing from the first to the tenth parity, with a seasonal performance around 155 days between the fourth and eighth calving. DO heritability estimated by UM was variable, with values of 0.03 for the first calving and 0.06 for the sixth. These variations cannot be observed with RM that estimated a heritability of 0.06. Values of 0.05 in the first calving until 0.07 in the tenth were estimated with ARM. Genetic correlations among DO for different parities were close to unity. Conclusions: changes of the estimated heritability for DO through the productive life of a female can be observed with ARM. The heritability estimates were low and did not differ from the results reported in other beef cattle breeds.

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“…A 12‐month calving interval, i.e. one calf per year, has been a management target in Japanese cow–calf production from an economic viewpoint, as described in Oyama et al . (1996).…”

Section: Resultsmentioning

confidence: 99%

Evaluating environmental impacts of the Japanese beef cow–calf system by the life cycle assessment method

Ogino

Orito

Shimada

et al. 2007

Animal Science Journal

124

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The objectives of this study were to evaluate the environmental impacts of a beef cow–calf system using a life cycle assessment (LCA) method and to investigate the effects of scenarios to reduce environmental impacts on the LCA results. The functional unit was defined as one marketed beef calf, and the processes associated with the cow–calf life cycle, such as feed production, feed transport, animal management, the biological activity of the animal and the treatment of cattle waste were included in the system boundary. The present results showed that the total contributions of one beef calf throughout its life cycle to global warming, acidification, eutrophication and energy consumption were 4550 kg of CO2 equivalents, 40.1 kg of SO2 equivalents, 7.0 kg of phosphate (PO4) equivalents and 16.1 GJ, respectively. The contribution of each process to the total environmental impact in each environmental impact category showed a similar tendency to the contribution of each process in each environmental category reported in the case of the beef fattening system as a whole. The results from this analysis showed that shortening calving intervals by 1 month reduced environmental impacts by 5.7–5.8% in all the environmental impact categories examined in the current study, and increasing the number of calves per cow also reduced environmental impacts in all the categories, although the effects were smaller.

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Genetic Relationships Among Traits Recorded at Registry Judgment, Reproductive Traits of Breeding Females and Carcass Traits of Fattening Animals in Japanese Black Cattle

Cited by 19 publications

References 13 publications

Genetic Analysis of Reproductive Traits in Bali Cattle Maintained on Range Under Artificially and Naturally Bred

Genetic Analysis of Reproductive Traits in Bali Cattle Maintained on Range Under Artificially and Naturally Bred

Genetic parameters of days open in Charolais cattle of Cuba

Evaluating environmental impacts of the Japanese beef cow–calf system by the life cycle assessment method

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