Average daily gain and kleiber ratio in Bharat merino sheep

2019 ◽  
Vol 25 (2) ◽  
pp. 151
Author(s):  
P.K. Mallick ◽  
I.S. Chauhan ◽  
G.R. Gowane ◽  
P. Thirumurgan ◽  
G. Murali ◽  
...  
Keyword(s):  
Average Daily Gain ◽  
Merino Sheep ◽  
Kleiber Ratio ◽  
Daily Gain

scholarly journals Effectiveness of Genetic Parameter Estimation in a Small Flock of Merino Sheep with Shallow Pedigree

2020 ◽  
Vol 8 (4) ◽  
pp. 920-926
Author(s):  
Serdar Duru ◽  
Mehmet Koyuncu
Keyword(s):  
Growth Traits ◽  
Genetic Parameter ◽  
Average Daily Gain ◽  
Information Criterion ◽  
Suitable Model ◽  
Merino Sheep ◽  
Kleiber Ratio ◽  
Sources Of Variation ◽  
Maternal Heritability ◽  
Daily Gain

In this study, the genetic and non-genetic parameters were estimated for growth traits of Karacabey merino sheep. Growth performance data refer to 1863 lambs born between 2016 and 2018. Analyses were carried out by restricted maximum likelihood fitting animal models and disregarding or including maternal genetic or maternal permanent environmental effect. Six different animal model were fitted for all traits, and the most suitable model for each trait was chosen after Akaike information criterion test (AIC). Year of birth, age of dam, type of birth and lamb sex were significant sources of variation on birth weight (BW), average daily gain (ADG), Kleiber ratio (KR), weaning weight (WW) and six month weight (6MW). Direct heritability (h^2) for BW, ADG and 6MW were 0.12, 0.02 and 0.04, respectively, however, for KR and WW were 0.00 model 6 (which the best). The estimates of maternal heritability (m^2) for ADG, KR and WW were 0.12, 0.04 and 0.04, respectively in model 5, also maternal heritability were low for BW and 6MW. Maternal permanent environmental effects (c^2) have high contribution to the explanation growth traits and were estimated between 0.19 and 0.75 for these traits. These results showed that selecting for improved maternal and/or direct effects for Karacabey merino in the herd would generate very slow genetic improvement in growth traits.

scholarly journals Residual feed intake and relationships with performance of Nellore cattle selected for post weaning weight

2011 ◽  
Vol 40 (4) ◽  
pp. 929-937 ◽  
Author(s):  
T. Lucila Sobrinho ◽  
R.H. Branco ◽  
S.F.M. Bonilha ◽  
A.M. Castilhos ◽  
L.A. Figueiredo ◽  
...  
Keyword(s):  
Body Weight ◽  
Standard Deviation ◽  
Feed Intake ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Feed Conversion ◽  
Relative Growth ◽  
Kleiber Ratio ◽  
Nellore Cattle ◽  
Daily Gain

The objective of this work was to evaluate performance, efficiency parameters and phenotypic correlations among measurements of energy efficiency of Nellore cattle selected for post weaning weight and classified according to residual feed intake, calculated by the difference between observed and predicted intake, based on average metabolic body weight and average daily gain. Thus, animals were classified within three groups: high (> mean + 0.5 standard deviation, less efficient); medium (±0.5 standard deviation of the mean); and low (< mean - 0.5 standard deviation, more efficient) residual feed intake. No differences were observed at initial and final body weights, average daily gain and dry matter intake among groups. Animals with low residual feed intake also had greater feed efficiency, feed conversion and partial efficiency of growth and did not differ from the other animals regarding to relative growth rate and Kleiber ratio. Residual feed intake was significantly correlated to feed efficiency (-0.25), feed conversion (0.25), partial efficiency of growth (-0.37) and dry matter intake (0.16) but it did not present significant correlation with body weight (0.04), average daily gain (-0.02), relative growth rate (-0.03) and Kleiber ratio (-0.05). Significant correlations were found between feed conversion and initial body weight (0.34) and average daily gain (-0.46). Partial efficiency of growth presented significant correlation with all other efficiency parameters analyzed. Residual feed intake has high potential in productive efficiency, when compared to the other energy efficiency measurements, being independent of growth and size of the animals.

Genetic parameters for growth rate and Kleiber ratios of Nellore sheep

2018 ◽  
Author(s):  
I. Satish Kumar ◽  
G. Gangaraju ◽  
C. Vijaya Kumar ◽  
Sapna Nath
Keyword(s):  
Andhra Pradesh ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Genetic Correlations ◽  
Research Station ◽  
Genetic Progress ◽  
Stages Of Growth ◽  
Kleiber Ratio ◽  
Nellore Sheep ◽  
Daily Gain

Data on growth traits of Nellore sheep were extracted from the records maintained at Livestock Research Station, Palamaner, Andhra Pradesh, India for a period of five years. The genetic and phenotypic parameters were estimated for growth traits i.e., average daily gain (ADG) from birth to 3 months (ADGa), 3 months to 6 months (ADGb), 6 to 12 months (ADGc) and the corresponding Kleiber ratio (KR) at respective stages of growth. The non genetic factors included in the model were having significance on most of the traits studied. The heritability estimates for ADG and corresponding KR ranged from 0.17 to 0.25. The estimates of genetic correlations among the traits ranged between -0.28 (Ka-Kb) and 0.99 (ADGb-Kb). The moderate estimates of heritability, high and positive genetic correlations among the traits in the study were suggestive of moderate genetic progress in the Nellore breed of sheep through selection.

Effect of Non-Genetic factors on average daily gain and kleiber ratio in jakhrana goats

2019 ◽  
Vol 25 (1) ◽  
pp. 108
Author(s):  
Saket Bhusan ◽  
Gopal Dass ◽  
Manali Baghel ◽  
M.S. Dige
Keyword(s):  
Genetic Factors ◽  
Average Daily Gain ◽  
Kleiber Ratio ◽  
Daily Gain

Evaluating animal models comprising direct and maternal effects associated with growth rates and the Kleiber ratio in Harnali sheep

Zygote ◽  
2021 ◽  
pp. 1-5
Author(s):  
Ashish Chauhan ◽  
S.P. Dahiya ◽  
Ankit Magotra ◽  
Yogesh C. Bangar
Keyword(s):  
Animal Models ◽  
Maternal Effects ◽  
Growth Rates ◽  
Variance Components ◽  
Average Daily Gain ◽  
Genetic Correlations ◽  
Ratio Test ◽  
Kleiber Ratio ◽  
Managerial Strategies ◽  
Daily Gain

Summary The present work evaluated animal models comprising direct and maternal effects to estimate (co)variance components and genetic parameters of growth rates and Kleiber ratio in Harnali sheep. The information on pedigree and targeted traits of 1862 lambs born to 144 sires and 591 dams was collected for the period from 1998 to 2018. The traits studied were average daily gain from birth to 3 months of age (ADG1), 3 months to 6 months of age (ADG2), and 6 months to 12 months of age (ADG3) and their corresponding Kleiber ratios as KR1, KR2 and KR3, respectively. The statistical methods included the general linear model for analyzing the effects of fixed factors and animal models for deriving variance components for targeted traits. According to best model evaluated on the basis of likelihood ratio test, the estimated direct heritability was low in magnitude and ranged from 0.04 to 0.14. Direct heritability estimates for ADG1, ADG2, ADG3, KR1, KR2 and KR3 were 0.06, 0.14, 0.05, 0.04, 0.11 and 0.05, respectively. The maternal genetic effects contributed (4–7%) significantly for ADG1, KR1 and KR2 traits. The genetic correlations ranged from −0.35 ± 0.11 (ADG1-KR2) to 0.98 ± 0.01 (ADG2-KR2 and ADG3-KR3) and phenotypic correlations ranged from −0.36 ± 0.02 to 0.98 ± 0.01 for ADG1-KR2 and ADG2-KR2, respectively. The significant maternal effects along with low levels of direct effects for average daily gain and Kleiber ratio at different age group should be considered while setting selection and managerial strategies to achieve anticipated growth rates in Harnali sheep.

Heritability estimates for average daily gain and kleiber ratio in deccani sheep

2018 ◽  
Vol 24 (1) ◽  
pp. 18 ◽  
Author(s):  
Y.C. Bangar ◽  
V.S. Lawar ◽  
C.A. Nimbalkar ◽  
O.V. Shinde ◽  
R.G. Nimase
Keyword(s):  
Average Daily Gain ◽  
Kleiber Ratio ◽  
Heritability Estimates ◽  
Daily Gain

Factors affecting post-weaning average daily gain and kleiber ratio in Muzaffarnagari sheep

2019 ◽  
Vol 25 (2) ◽  
pp. 148
Author(s):  
Gopal Dass ◽  
Saket Bhusan ◽  
Vinay Chaturvedi ◽  
M.S. Dige ◽  
P.K. Rout
Keyword(s):  
Average Daily Gain ◽  
Factors Affecting ◽  
Kleiber Ratio ◽  
Daily Gain
Sign in / Sign up

Export Citation Format

Share Document