Estimation of growth traits heritability coefficients in sheep

The objective of this research paper was to estimate heritability coefficients (heritability) of growth traits in the lambs of indigenous Sjenicka Pramenka breed. The research was conducted on a sample which included 421 lambs the descendants of 15 sires and 187 sheep-dams, raised on 3 private farms in Kolubarski district, Serbia. The effect of fixed factors was studied while the values of heritability coefficients were estimated within the frame of SAS software package. A statistically highly significant (**=P<0.01) effect on studied traits had following parameters: sex, year of lambing, type of lambing, farm and method of applied reproductive technology. By means of REML method and using the sire model the values of heritability coefficients were determined for the following traits: average lamb birth weight (BW0), average lamb body weight at 30 days (BW30) and average lamb body weight at 90 days (BW90) being: 0.0355; 0.4642 and 0.3018, respectively.

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Genomic prediction for growth using a low-density SNP panel in dromedary camels

Scientific Reports ◽

10.1038/s41598-021-87296-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Morteza Bitaraf Sani ◽

Javad Zare Harofte ◽

Mohammad Hossein Banabazi ◽

Saeid Esmaeilkhanian ◽

Ali Shafei Naderi ◽

...

Keyword(s):

Body Weight ◽

Birth Weight ◽

Sample Size ◽

Genetic Improvement ◽

Growth Traits ◽

P Value ◽

Dromedary Camels ◽

Genome Wide ◽

A Genome ◽

Daily Gain

AbstractFor thousands of years, camels have produced meat, milk, and fiber in harsh desert conditions. For a sustainable development to provide protein resources from desert areas, it is necessary to pay attention to genetic improvement in camel breeding. By using genotyping-by-sequencing (GBS) method we produced over 14,500 genome wide markers to conduct a genome- wide association study (GWAS) for investigating the birth weight, daily gain, and body weight of 96 dromedaries in the Iranian central desert. A total of 99 SNPs were associated with birth weight, daily gain, and body weight (p-value < 0.002). Genomic breeding values (GEBVs) were estimated with the BGLR package using (i) all 14,522 SNPs and (ii) the 99 SNPs by GWAS. Twenty-eight SNPs were associated with birth weight, daily gain, and body weight (p-value < 0.001). Annotation of the genomic region (s) within ± 100 kb of the associated SNPs facilitated prediction of 36 candidate genes. The accuracy of GEBVs was more than 0.65 based on all 14,522 SNPs, but the regression coefficients for birth weight, daily gain, and body weight were 0.39, 0.20, and 0.23, respectively. Because of low sample size, the GEBVs were predicted using the associated SNPs from GWAS. The accuracy of GEBVs based on the 99 associated SNPs was 0.62, 0.82, and 0.57 for birth weight, daily gain, and body weight. This report is the first GWAS using GBS on dromedary camels and identifies markers associated with growth traits that could help to plan breeding program to genetic improvement. Further researches using larger sample size and collaboration of the camel farmers and more profound understanding will permit verification of the associated SNPs identified in this project. The preliminary results of study show that genomic selection could be the appropriate way to genetic improvement of body weight in dromedary camels, which is challenging due to a long generation interval, seasonal reproduction, and lack of records and pedigrees.

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Estimates of genetic parameters for pre-weaning and post-weaning growth traits of Chios lambs

Animal Science ◽

10.1017/s0003356100024053 ◽

1980 ◽

Vol 30 (2) ◽

pp. 271-276 ◽

Cited By ~ 28

Author(s):

A. P. Mavrogenis ◽

A. Louca ◽

O. W. Robison

Keyword(s):

Body Weight ◽

Birth Weight ◽

Genetic Parameters ◽

Growth Traits ◽

Genetic Correlations ◽

Heritability Estimate ◽

Weaning Weight ◽

Phenotypic Correlations ◽

Selection For ◽

Daily Gain

ABSTRACTData on 792 Chios lambs born during the 1972/73 and 1973/74 lambing seasons were used to estimate genetic and phenotypic parameters for birth weight, weaning weight, age at weaning, pre-weaning daily gain, body weight at 5, 10, 15 and 20 weeks of age, and postweaning daily gain. Body weight at 15 weeks of age had the highest heritability estimate (0·73 ± 0·17) and that of post-weaning daily gain was also high (0·56 ± 0·15). Selection for either weight at 15 weeks or post-weaning daily gain would be expected to yield a greater response than selection for pre-weaning daily gain or weaning weight. Genetic correlations among weights and/or gains were positive (approximately 0·20). Phenotypic correlations among weights and gains were generally higher than genetic correlations. However, the correlation between pre— and post-weaning daily gain was small (0·08). Likewise, post-weaning daily gain had low correlations with all weights before 10 weeks. Age at weaning had moderate negative associations with all weights but a very low positive correlation with post-weaning daily gain.

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Estimasi Parameter Genetik Sifat Pertumbuhan Kambing Boerawa di Kabupaten Tanggamus Propinsi Lampung (Genetic Parameters Estimation on Growth Traits of Boerawa Goat at Tanggamus Regency Lampung Province)

Buletin Peternakan ◽

10.21059/buletinpeternak.v34i3.82 ◽

2012 ◽

Vol 34 (3) ◽

pp. 138

Author(s):

Veronika Yuneriati Beyleto ◽

Sumadi (Sumadi) ◽

Tety Hartatik

Keyword(s):

Birth Weight ◽

Genetic Correlation ◽

Genetic Parameters ◽

Growth Traits ◽

Genetic Parameter ◽

Parameters Estimation ◽

Weaning Weight ◽

Estimate Heritability ◽

Growth Character ◽

Daily Gain

This research was conducted to estimate heritability, repeatability and genetic correlation values on growth traits of Boerawa goat at Sumber Rejeki farmer group at Campang Village, Gisting District and Karya Makmur I and Karya Makmur II farmer group at Wonoharjo and Sukoharjo Village, Sumber Rejo District, Tanggamus regency, Lampung province. Data consisted of production record and 238 Boerawa goat derived from 93 PE and 7 Boer buck. The research was started on October 30, 2009 up to January 30, 2010. The results indicated that heritability value of birth weight, weaning weight, yearling weigth, average of preweaning daily gain, and average of postweaning weight analyzed by paternal half-sibs correlation were 0.80±0.40; 0.30±0.17; 0.80±0.04; 0.32±0.18 and 0.30±0.17, respectively. The repeatability values of birth weight, weaning weight and yearling weight analyzed based on two recording per every dam were 0.42±0.07; 0.32±0.08; 0.30±0.08; 0.30±0.08 and 0.53±0.06. The genetic correlation values among birth weight and weaning weight, birth weight and yearling weight, weaning weight and yearling weight, average of preweaning weight and postweaning weight daily gain analyzed by paternal half-sibs correlation were 0.50±0.04; 0.44±0.08; 0.21±0.03 and 0.20±0.05, respectively. The result also indicated that the heritability and repeatability values was high and the genetic correlation values were moderate to high.(Key words: Boerawa goat, Genetic parameter, Growth character)

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The relationships between pre- and post-weaning growth traits in lambs of Iranian fat-tailed sheep and their crosses with Corriedale and Targhee rams

Animal Science ◽

10.1017/s000335610003960x ◽

1978 ◽

Vol 26 (2) ◽

pp. 185-192 ◽

Cited By ~ 3

Author(s):

A. Farid ◽

M. Makarechian

Keyword(s):

Body Weight ◽

Birth Weight ◽

Growth Traits ◽

Average Daily Gain ◽

High Growth ◽

Negative Association ◽

Food Conversion ◽

Weaning Weight ◽

Daily Gain ◽

Total Gain

ABSTRACTThe pre-weaning records (birth weight, weaning weight and gain from birth to weaning) of 291 male and female lambs and the post-weaning records (body weight, feedlot gain and food conversion) of 136 male lambs were used to study relationships between different traits. The lambs were derived from three fat-tailed Iranian sheep breeds (Karakul, Mehraban and Naeini) and their crosses with Corriedale and Targhee rams. All lambs were weaned at 75 + 5 days of age and the males were fed in a feedlot for 100 days after weaning. Feedlot measurements were taken at 20-day intervals.Weaning weight and pre-weaning average daily gain showed positive and significant associations with birth weight. Birth weight, weaning weight and gain from birth to weaning were positively associated with body weight at subsequent ages in feedlot as well as with final weight (P<0·01). Birth weight, weaning weight and pre-weaning average daily gain were positively and significantly associated with total feedlot gain.Of the different traits, total gain during the first 20 days in feedlot (adjust period) had the lowest and total gain during the second 20 days had the highest association with total feedlot daily gain. There was no evidence that the heavier lambs at weaning and those showing high growth rate before weaning, were more efficient in the feedlot. Gain during the second 20-day period in the feedlot had a significant negative association with the total food conversion (unit food/unit gain) and therefore was a good predictor for food conversion.When the feedlot period was divided into two 40-day periods, it was found that gain during both had a significant negative association with the corresponding food conversion. A similar association was observed between total feedlot gain and food conversion, indicating that the rate and efficiency of gain improved simultaneously.

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Morphological Features and Growth Traits of Half Sib Local Pabna Calves up to Yearling Stages

Agricultural Science Digest - A Research Journal ◽

10.18805/ag.d-273 ◽

2021 ◽

Author(s):

M.A.I. Talukder ◽

M. Shahjahan ◽

S. Munira ◽

S. Rahman ◽

A.K.F.H. Bhuiyan

Keyword(s):

Body Weight ◽

Birth Weight ◽

Growth Traits ◽

Tail Length ◽

Morphological Features ◽

The Body ◽

Abdominal Circumference ◽

Moderate Correlation ◽

Increasing Trend ◽

Newborn Calves

Background: Usually morphological features and growth traits are used in breed characterization. The research was performed to reveal the phenotypic and growth traits of half sib local Pabna calves up to yearling stages and to reveal their association with selection regarding body size and morphological features. Methods: Data of phenotypic measures from both body and head parts and growth traits were collected from 18 and 22 half sib Pabna calves, respectively. The body weight of newborn calves and respective dams were recorded separately. Each calf was allowed to drink 10% of milk for individual’s body weight from respective dam twice per day at calf shed.Result: Linear increasing trend observed in all morphological features from birth to yearling stages for both body and head characteristics of Pabna calves in which heart girth (63.33±1.31 cm at birth and 91.83±2.18 cm at pre-weaning), wither height (84.17±0.60 cm at pre-weaning), carpal circumference (10.50±0.50 cm at birth), mouth circumference (21.33±0.33 cm at birth and 26.58 cm at pre-weaning) and head length (30.08±0.99 cm at pre-weaning) had significant differences (p less than 0.05) in male calves compare to female. The effect of calves’ birth weight deferred significantly (p less than 0.05) for body length, heart girth, abdominal circumference, wither height and tail length in the calves’ group having ≥20 kg of birth weight compare to less than 20 kg. Body weight of Pabna calves also showed linear fashion from birth (19.56±2.11 kg) to yearling stages (112.33±3.30 kg) including moderate correlation at first (53%) and twelfth (48%) month and weak at weaning (7%) stages. The sex and birth weight of calf had significant effects (p less than 0.05) up to pre-weaning stage of calf but its continuation was not followed up to yearling stages.

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Analysis of environmental and genetic factors in growth characteristics of Balkan goat

Biotechnology in Animal Husbandry ◽

10.2298/bah1202275c ◽

2012 ◽

Vol 28 (2) ◽

pp. 275-282 ◽

Cited By ~ 3

Author(s):

V. Caro-Petrovic ◽

Z. Ilic ◽

D. Ruzic-Muslic ◽

M.P. Petrovic ◽

M.M. Petrovic ◽

...

Keyword(s):

Body Weight ◽

Birth Weight ◽

Environmental Factors ◽

Genetic Parameters ◽

Genetic Factors ◽

Growth Traits ◽

Growth Characteristics ◽

The Body ◽

Goat Breed ◽

The Impact

Research was conducted on animals of Balkan goat breed. The impact of environmental factors on the weight of kids was analyzed, and also the value of genetic parameters of growth traits of kids to weaning had been examined. The body weight of kids varied depending on the year from 2.27?0.09 kg to 2.43?0.08 kg at birth and 10.81?0.58 kg to 11.13?0.51 kg at weaning. Variations depending on the season, ranged from 2.24?0.09 kg to 2.51?0.05 kg. Sex also had an impact because the male kids had higher weight of 0.12 kg at birth and 0.20 kg at weaning. All differences caused by environmental factors were statistically significant (P<0.01). Single born kids in comparison with twin born kids had higher birth weight by 0.22 kg at birth and 0.37 kg in weaning. The differences were statistically significant (P<0.01). It is a known fact that the increase in litter size influences decrease in body weight of kids. We also found that the weight at birth is associated with body weight at weaning. Heritability for growth traits observed moving in the range of low values from 0.102 ? 0.039 to 0.153 ? 0.041. Repeatability of the observed traits varied from low to medium values in the interval from 0.118 ? 0.030 to 0.528 ? 0025.

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Genomic Prediction for Growth Using Low-Density SNP Panel in Dromedary Camels

10.21203/rs.3.rs-109354/v1 ◽

2020 ◽

Author(s):

Morteza Bitaraf Sani ◽

Javad Zare Harofte ◽

Mohammad Hossein Banabazi ◽

Saeid Esmaeilkhanian ◽

Ali Shafei Naderi ◽

...

Keyword(s):

Body Weight ◽

Birth Weight ◽

Sample Size ◽

Genetic Improvement ◽

Growth Traits ◽

P Value ◽

Dromedary Camels ◽

Genome Wide ◽

A Genome ◽

Daily Gain

Abstract For thousands of years, camels have produced meat, milk, and fiber in harsh desert conditions. For a sustainable development to provide protein resources from desert areas, it is necessary to pay attention to genetic improvement in camel breeding. By using genotyping-by-sequencing (GBS) method we produced over 14,500 genome wide markers to conduct a genome- wide association study (GWAS) for investigating the birth weight, daily gain, and body weight of 96 dromedaries in the Iranian central desert. A total of 99 SNPs were associated with birth weight, daily gain, and body weight (p-value < 0.002). Genomic breeding values (GEBVs) were estimated with the BGLR package using (i) all 14,522 SNPs and (ii) the 99 SNPs by GWAS. Twenty-eight SNPs located in 36 candidate genes were associated with birth weight, daily gain, and body weight (p-value < 0.001). The accuracy of GEBVs was more than 0.65 based on all 14,522 SNPs, but the regression coefficients for birth weight, daily gain, and body weight were 0.39, 0.20, and 0.23, respectively. Because of low sample size, the GEBVs were predicted using the associated SNPs from GWAS. The accuracy of GEBVs based on the 99 associated SNPs was 0.62, 0.82, and 0.57 for birth weight, daily gain, and body weight. This report is the first GWAS using GBS on dromedary camels and identifies markers associated with growth traits that could help to plan breeding program to genetic improvement. Further researches using larger sample size and collaboration of the camel farmers and more profound understanding will permit verification of the associated SNPs identified in this project. The preliminary results of study show that genomic selection could be the appropriate way to genetic improvement of body weight in dromedary camels, which is challenging due to a long generation interval, seasonal reproduction, and lack of records and pedigrees.

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Estimation of heritability, breeding values and genetic trends for growth traits of exotic goat

International Journal of Natural Sciences ◽

10.3329/ijns.v3i1.28580 ◽

2016 ◽

pp. 7-11 ◽

Cited By ~ 1

Author(s):

MR Hassan ◽

S Sultana ◽

A Iqbal ◽

MAI Talukder

Keyword(s):

Body Weight ◽

Birth Weight ◽

Variance Components ◽

Growth Traits ◽

Live Weight ◽

Weaning Weight ◽

Breeding Values ◽

Goat Farm ◽

The Mean ◽

Genetic Trends

The present study was considered to estimate the variance components, heritability and prediction of breeding values (PBV) for important growth traits of exotic goat. Traits were considered birth weight, weaning weight, 6 months weight and weight at 9 months. Data were collected from the goat farm of Bangladesh livestock research institute (BLRI), Savar, Dhaka. Heritability values for the studied traits were estimated by Multivariate animal model using principles of Restricted Maximum Likelihood (REML) procedure. The mean birth weight, weaning weight, 6 and 9 months weight of exotic goat were recorded as 1.41, 7.39, 11.06 and 14.09 kgs respectively. Calculated Heritability values were 0.33, 0.39, 0.45 and 0.32 for the birth weight, weaning weight, and weight at 6 and 9 month respectively. Heritability estimates for different growth traits of exotic goat were found higher but the highest for the 6 month body weight (0.45). Among the live weight categories of exotic goat the maximum average PBV was found for the 6-month body weight (7.42). The genetic trends among the generations in birth and 6 month weight were increased from foundation to generation 1 and 2. Therefore, the results revealed that the 6 months body weight can be considered as an indicator of growth and sire selection and could be effective for enhancing growth of exotic kids.International Journal of Natural Sciences (2013), 3(1-4) 7-11

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UTICAJ GODINE, POLA I TIPA ROĐENJA NA TELESNU MASU I PORAST JAGNJADI BERGAMO RASE OVACA

Zbornik radova ◽

10.46793/sbt26.199z ◽

2021 ◽

Author(s):

Krstina Zeljic ◽

◽

Dragan Stanojevic ◽

Vladan Bogdanovic ◽

Nikolija Gligovic ◽

...

Keyword(s):

Body Weight ◽

Birth Weight ◽

Software Package ◽

Weaning Weight ◽

Average Body ◽

Agricultural Farm ◽

Average Body Weight

The aim of this study was to examine the influence of age, sex and type of birth on the traits of growth in bergamasca lambs. The research was conducted on a sample which included 141 lambs (68 male, 73 female lambs), born from 2014 to 2015, raised on one agricultural farm in Vojvodina. The average body weight of lambs at birth was 3.67 kg, with 30 days of age 10.60 kg, and weaning weight 30.77 kg. The effect of fixed factors was studied within the frame of SAS software package. A statistically highly significant (**=P<0.01) effect on studied traits: average lamb birth weight (BW0), average lamb body weight at 30 days (BW30) and weaning weight, had all the examined factors.

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