Development of Linear Score System for Sahiwal Cows in Pakistan

Khan, Mueen Alam

doi:10.14737/journal.jahp/2015/3.3.59.63

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The heritability estimates for linear type traits of Sahiwal cattle and influence of non-genetic factors on such traits has been reported for the first time in Pakistan (Khan and Khan, 2015a;Khan and Khan, 2016). The linear score system for Sahiwal cattle has been developed (Khan and Khan, 2015b). The genetic and phenotypic correlations among linear type traits for Sahiwal cattle have been reported (Khan et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Genetic and Phenotypic Correlations Between Linear Type Traits and Milk Yield in Sahiwal Cows

Khan¹,

Khan²

2016

PAKJAS

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The traits of economic importance in farm animals are mostly controlled by many gene pairs and hence show correlations. The knowledge of such correlations is very much needed while making multiple traits selection in farm animals. The present study was planned with the objectives to find out genetic and phenotypic correlations between linear type traits and milk yield in Sahiwal cows. Freshly calved 310 cows were scaled and scored for traits on a linear scale of 1-9 following the guide lines of International Committee on Animal Recording. The variance and covariance components were estimated using residuals or restricted maximum likelihood (REML) procedures. The linear mixed model was fitted for estimation of variance. Bivariate animal model analysis was performed for estimation of genetic and phenotypic correlations. Stature, angularity, rear udder height, fore teat length, dewlap width, foot angle, udder depth and rear udder width were significant sources of variation for score-day milk yield (P<0.05-P<0.001). The 305-day milk yield was influenced by linear type traits of rump angle, rump width, central ligament and rear udder width (P<.05-P<.001). Highest positive genetic correlations were for rear udder width with score-day milk yield (0.43±0.00) and 305 days milk yield (0.40±0.00). The highest negative genetic correlation (-0.27±0.00 and-0.23±0.00) was found of udder depth with score-day milk yield and 305-day milk yield. The phenotypic correlations ranged from-0.23±0.06 between udder depth and score-day milk yield to 0.54±0.04 between rear udder width and score-day milk yield. The genetic and phenotypic correlations will help to short list the type traits and put focus on those that are more important. The linear scoring in Sahiwal cattle should be initiated at public and private farms.

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Section: Introductionmentioning

confidence: 99%

Genetic and Phenotypic Correlations Between Linear Type Traits and Milk Yield in Sahiwal Cows

Khan¹,

Khan²

2016

PAKJAS

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“…Significant effect of location on LU and WU was reported by Kayastha [9] in Assam local cattle and Gajbhiye [16] in crossbred cattle. Moreover, significant effect of location on DU and TeL was reported by Khan and Khan [17] in Sahiwal cattle and Terefe et al [10] in Mursi cattle respectively. However, non-significant effect of location on Du, TeL and TeD was reported by Kayastha [9] in Assam local cattle.…”

Section: Effect Of Locationmentioning

confidence: 85%

Effect of Non-genetic Factors on Udder Biometry of Indigenous Cattle of Arunachal Pradesh, India

Kakki,

Zaman,

Akhtar

et al. 2024

UPJOZ

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The study was undertaken to estimate the effect non-genetic factors on the udder biometry of indigenous cattle of Arunachal Pradesh. A total of 158 indigenous cows were utilized to study the effect of location and lactation order on udder characteristics. Length of udder (LU), width of udder (WU), depth of udder (DU), teat length (TeL) and teat diameter (TeD) were included in the present investigation. The data on udder measurement were classified according to location and lactation order of the animal. The means for LU, WU, DU, TeL and TeD were 30.940 ± 0.105, 21.506 ± 0.069, 9.923 ± 0.037, 4.459 ± 0.024, and 2.762 ± 0.025 cm respectively. Location and lactation order had significant effect on all the udder measurement traits. Existence of significant effect of this non-genetic factor indicates that these factors should be taken care of while estimating the genetic parameters for udder characteristics of indigenous cattle of Arunachal Pradesh.

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“…8,35 Milk productions can severely be affected by the health status of a cow, nutrition, genetic and other related herd management. 36,39…”

Section: Average Daily Milk Yieldmentioning

confidence: 99%

Retrospective and current status of reproduction and Health Problems at Algae Dairy Farm, Central Ethiopia

Mekuria,

Jerjero,

Acha

2021

JDVAR

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Study was conducted between November 2015 and March 2016 at Alagae dairy farm. The objective of study was to evaluate ten years record and the current status of dairy farm. A total of 370 cow’s record and 105 monitored dairy cows’ were used for the study. The overall mean months of 27.68±6.48 age at first service, 37.8±6.88 age at first calving, 16.36±5.2 calving interval, 6.93±4.79 days open (DO) and 10.32±2.84 lactation length (LL) observed. Increasingly, 1.38±0.54 number of services per conception (NSC) and average daily milk yield of 8.22±2.2 liters/day/cow were observed in the dairy farm. Average daily milk yield had a significant difference (p<0.05) between Holstein and their crosses. Reproductive performance did not show difference between retrospective and longitudinal studies using Mann Whitney U – test. Similar health problems like abortion, dystocia, metritis, repeat breeder, retained fetal membrane, mastitis and pre-weaning calf mortality observed in both retrospective and longitudinal studies cows. Physical damage and infectious diseases were also common in the farm. In conclusion, this study revealed that the reproductive performance of the dairy farm was below the acceptable standard. Therefore, appropriate measures should be implemented at Alagae dairy farm in order to leverage the existing poor reproductive performance of the farm.

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Development of Linear Score System for Sahiwal Cows in Pakistan

Cited by 6 publications

References 11 publications

Genetic and Phenotypic Correlations Between Linear Type Traits and Milk Yield in Sahiwal Cows

Genetic and Phenotypic Correlations Between Linear Type Traits and Milk Yield in Sahiwal Cows

Effect of Non-genetic Factors on Udder Biometry of Indigenous Cattle of Arunachal Pradesh, India

Retrospective and current status of reproduction and Health Problems at Algae Dairy Farm, Central Ethiopia

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