Relationship between sire x year interactions and direct-maternal genetic correlation for weaning weight of Simmental cattle.

The objectives of this research were to estimate the genetic parameters of production characteristics, breeding value (BV), weaning weight ratio (WWR) correlation with BV and most probable producing ability (MPPA) of Simmental cattle reared at Balai Pembibitan Ternak Unggul Sapi Potong Padang Mengatas. Research was based on records of birth weight (BW), weaning weight (WW), post weaning average daily gain (ADG) and yearling weight (YW) from 2002 to 2007. Heritability value (h2) was estimated for BV, WW, ADG and YW using paternal-half sib correlation and repeatability value (r) of characteristics of both using intra class correlation. The genetic correlation (rG) of BW-WW, WW-YW, WW-ADG, WW-YW, WW-ADG and YW-ADG were analyzed by variance and covariance. BV and MPPA estimation was base on record of weaning weight. The h2 value of BW, WW, YW and ADG were 0.11±0.09; 0.39±0.16; 0.43±0.19; and 0.46±0.20, respectively. The r of BW, WW, YW and ADG, were 0.25±0.16; 0.32±0.18; 0.25±0.22; and 0.34±0.16, respectively. The genetic correlation value of BW-WW, WW-YW, WW-ADG, WW-YW, WW-ADG and YW-ADG were 0.29±0.37; 0.46±0.33; 0.2 ±0.39; 0.68±0.16; 0.006±0.30 and 0.57±0.21, respectively. From 18 Bulls, 10 bulls (55.56%) had the BV higher then average population value, 142.21 kg and the remaining 8 bulls (44.44%) was lower then average population value. Frequency of the BV of prospective male and female with WW higher than WW average was 210 calves (44.68%); whereas, 260 calves (55.32%) had WW lower than average population corrected with parent age (130.21 kg). Range of absolute BV was from 112.77 kg to 155.91 kg. The BV of male had average frequency higher than that of female, i.e. 149 males (66.22%) compared to 61 female (24.90%). The MPPA with above the average WW of the population was 150 cows (41.67%) and the rest of cows (210 head or 58.33%) were under the average. The WWR had positive and significant correlation (1.00**) with the NP. It means that, if the cattle have a high WWR, they will also have a high NP, so that they can be used as the criteria of selection.(Key words: Simmental cattle, Genetic parameters, Breeding value, Most probable producing ability, Weaning weight ratio)

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Estimation of direct and maternal genetic parameters for weaning weight in Hungarian Simmental cattle

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/2/9305 ◽

2021 ◽

pp. 17-22

Author(s):

Afees Abiola Ajasa ◽

Imre Füller ◽

Barnabás Vágó ◽

István Komlósi ◽

János Posta

Keyword(s):

Fixed Effects ◽

Genetic Parameters ◽

Additive Genetic Variance ◽

Random Effect ◽

Ratio Test ◽

Genetic Covariance ◽

Weaning Weight ◽

Simmental Cattle ◽

Estimate Variance ◽

Best Fit

The aim of the current research was to estimate variance components and genetic parameters of weaning weight in Hungarian Simmental cattle. Weaning weight records were obtained from the Association of Hungarian Simmental Breeders. The dataset comprised of 44,278 animals born from 1975 to 2020. The data was analyzed using the restricted maximum likelihood methodology of the Wombat software. We fitted a total of six models to the weaning weight data of Hungarian Simmental cattle. Models ranged from a simple model with animals as the only random effect to a model that had maternal environmental effects as additional random effects as well as direct maternal genetic covariance. Fixed effects in the model comprised of herd, birth year, calving order and sex. Likelihood ratio test was used to determine the best fit model for the data. Results indicated that allowing for direct-maternal genetic covariance increases the direct and maternal effect dramatically. The best fit model had direct and maternal genetic effects as the only random effect with non-zero direct-maternal genetic correlation. Direct heritability, maternal heritability and direct maternal correlation of the best fit model was 0.57, 0.16 and -0.78 respectively. The result indicates that problem of (co-)sampling variation occurs when attempting to partition additive genetic variance into direct and maternal components.

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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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Reproductive performance of ewe lambs: genetic correlation with weaning weight and subsequent reproductive performance

Australian Journal of Experimental Agriculture ◽

10.1071/ea9760321 ◽

1976 ◽

Vol 16 (80) ◽

pp. 321 ◽

Cited By ~ 3

Author(s):

R Barlow ◽

CJ Hodges

Keyword(s):

Genetic Correlation ◽

Reproductive Performance ◽

Agricultural Research ◽

Reproductive Rate ◽

Research Station ◽

Weaning Weight ◽

Net Reproductive Rate ◽

Ewe Lambs ◽

Ewe Lamb ◽

Selection For

The reproductive performance of Merino ewe lambs was examined in flocks with different selection histories for growth to weaning and net reproductive rate. These ewes were drawn from selection flocks maintained at the Agricultural Research Station, Trangie. There was evidence of a positive genetic correlation between weaning weight and reproductive performance of ewe lambs. Selection for weaning weight had a significant effect on the percentage of ewes lambing (P < 0.05). This appeared to be a function of a higher level of fertility (P <0.05) and a higher proportion of ewes mating (n.s.). The proportion of ewes apparently in oestrus during a 39 day teasing period, prior to joining, was significantly influenced by selection for weaning weight (P < 0.05). Simultaneous selection for increased net reproductive rate, weaning weight and clean fleece weight did not result in higher ewe lamb performance than that achieved by selection for increased weaning weight alone. No conclusion could be drawn from these data about the correlation between net reproductive rate and reproductive performance of ewe lambs.

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Estimasi Korelasi Genetik antara Bobot Lahir dengan Bobot Sapih pada Kambing Saburai di Sentra Pembibitan Kabupaten Tanggamus Provinsi Lampung

Jurnal Ilmu dan Teknologi Peternakan Tropis ◽

10.33772/jitro.v7i2.5628 ◽

2020 ◽

Vol 7 (3) ◽

pp. 247

Author(s):

Muhammad Dima Iqbal Hamdani ◽

Kusuma Adhianto ◽

Sumarni Sumarni ◽

Sulastri Sulastri

Keyword(s):

Birth Weight ◽

Genetic Correlation ◽

Survey Method ◽

Data Recording ◽

Breeding Area ◽

Weaning Weight ◽

Average Birth Weight ◽

Weaning Age ◽

Keywords Birth Weight ◽

Birth Type

ABSTRAKPenelitian ini bertujuan untuk mengetahui estimasi nilai korelasi genetik antara berat lahir dan berat sapih pada kambing saburai di Kabupaten Tanggamus. Penelitian dilakukan pada bulan Juli-Agustus 2018, berlokasi di Sentra pembibitan kambing saburai di Kabupaten Tanggamus. Materi penelitian ini sebanyak data 136 indukan dan data 150 anakan kambing saburai. Metode penelitian yaitu survei menggunakan data recording dan kuesioner. Variabel yang diamati adalah berat lahir dan berat sapih induk, berat lahir dan berat sapih cempe, umur sapih, umur induk saat melahirkan, tipe kelahiran cempe, dan jenis kelamin cempe. Hasil penelitian menunjukkan bahwa berat lahir dan berat sapih induk masing-masing adalah 3,10±0,47 dan 12,15± 2,29; berat lahir dan berat sapih cempe masing-masing adalah 3,25±0,48 dan 12,60± 2,77. Korelasi genetik berat lahir dan berat sapih di Sentra Pembibitan Kabupaten Tanggamus adalah 0,37. Kesimpulan dari penelitian ini adalah seleksi peningkatan bobot lahir akan meningkatkan bobot sapih kambing saburai.Kata kunci: bobot lahir, bobot sapih, kambing saburai, korelasi genetikABSTRACTThis study aims to determine the estimation of genetic correlation values of birth weights and weaning weights in Saburai goats in Tanggamus regency. The study was conducted in July-August 2018, located in the breeding area, Tanggamus Regency. The materials of research were data from 136 doe and 150 kids. The research was conducted by survey method using the recording data and questionnaire. The variables observed were birth weight and weaning weight of doe, birth weight and weaning weight of the kid, weaning age, doe’s age at parturition, birth type of kid, and sex of kid. The results of this study indicate that the average birth weight of doe was 3.10±0.47, the weaning weight of doe was 12.15±2.29, the birth weight of kid was 3.25±0.48, and weaning weight of kid was 12.60±2.77. It can be concluded that the estimation of genetic correlation between birth weight and weaning weight of saburai goat was high with score of 0.37. Selection on birth weight can increase weaning weight in saburai goat. Keywords: birth weight, weaning weight, saburai goat, genetic correlation

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MASS SELECTION FOR POSTWEANING GROWTH IN SWINE. III. CORRELATED RESPONSE IN WEANING WEIGHT AND FEED EFFICIENCY TO RECURRENT SELECTION FOR POSTWEANING AVERAGE DAILY GAIN IN SWINE

Canadian Journal of Animal Science ◽

10.4141/cjas73-027 ◽

1973 ◽

Vol 53 (2) ◽

pp. 173-178

Author(s):

G. W. RAHNEFELD

Keyword(s):

Genetic Correlation ◽

Feed Efficiency ◽

Average Daily Gain ◽

Direct Selection ◽

Correlated Response ◽

Mass Selection ◽

Total Response ◽

Weaning Weight ◽

Selection For ◽

Daily Gain

Correlated response in weaning weight and feed efficiency were estimated for a genetically variable population of swine selected during nine generations for postweaning average daily gain. Total response in weaning weight to direct selection for gain was 0.03 kg per generation. This was 3.1% of the predicted response. The estimate of genetic correlation between postweaning average daily gain and weaning weight was found high and positive (> 1). Total response in feed efficiency to direct selection for gain was −0.58 kg per generation. This was 10% of the predicted response. The estimate of genetic correlation between postweaning gain and feed efficiency was −0.35.

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Korelasi Genetik Pada Sifat Pertumbuhan Sapi Aceh di Kecamatan Indrapuri Provinsi Aceh

Jurnal Agripet ◽

10.17969/agripet.v14i1.1203 ◽

2014 ◽

Vol 14 (1) ◽

pp. 37-41 ◽

Cited By ~ 1

Author(s):

Widya Pintaka Bayu Putra ◽

Sumadi Sumadi ◽

Tety Hartatik

Keyword(s):

Birth Weight ◽

Genetic Correlation ◽

Standard Error ◽

Growth Traits ◽

Average Daily Gain ◽

Weaning Weight ◽

Final Weight ◽

Aceh Province ◽

Daily Gain

(The genetic correlation of growth traits in Aceh cattle at indrapuri district Aceh Province)ABSTRACT. This research was conducted to estimate genetic correlation of growth traits on Aceh cattle including birth weight (BW), weaning weight (WW), yearling weight (YW), and Average Daily Gain (ADG). The research was done at Indrapuri Breeding and Forage Centre (IBFC) of Aceh cattle from March 2013 to April 2013. The materials of this research consist of growth records from 2010 to 2012. The genetic correlation was analyzed by variance and covariance. The results indicated that the lowest standard error (SE) value of heritability showed on birth weight 0.15+0.13. Most of genetic correlation value on growth traits was positive and high categorized ( 0.50). The lowest SE value showed on correlation between birth weight and pre-weaning ADG (0.55+0.54), birth weight and post-weaning ADG (0,63+0,62), pre-weaning ADG and post-weaning ADG (0.71+0.33), pos-weaning ADG and weight/age or W/A (0.72+0.33) then final weight and W/A (0.94+0.69). It could be concluded that most of genetic correlation value on Aceh cattle growth traits were positive and high therefore the selection based on growth traits can be done for increasing performance in Aceh cattle.

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Investigation of genotype × production environment interaction for weaning weight in the Santa Gertrudis breed in Australia

Australian Journal of Agricultural Research ◽

10.1071/a96009 ◽

1997 ◽

Vol 48 (1) ◽

pp. 1 ◽

Cited By ~ 9

Author(s):

M. J. Bradfield ◽

H-U. Graser ◽

D. J. Johnston

Keyword(s):

Genetic Correlation ◽

Variance Components ◽

Environment Interaction ◽

Maximum Likelihood Analysis ◽

Production Environment ◽

Weaning Weight ◽

Additive Genetic Correlation ◽

Contemporary Group ◽

Production Environments ◽

Likelihood Analysis

Weaning weight records of 12 563 Santa Gertrudis calves were used to estimate (co)variance components using a bivariate restricted maximum likelihood analysis. The analysis considered measurements on animals born in favourable production environments as Trait 1 and animals born in unfavourable production environments as Trait 2. Estimates of variance components for weaning weight across production environments were similar in magnitude. An additive genetic correlation of 0·64 between production environments was significantly different from unity, suggesting that there was a genotype production environment interaction. However, when a sire contemporary group interaction effect was included in the model, the genetic correlation between Trait 1 and Trait 2 was not significantly different from unity. These results suggest that the ranking of Santa Gertrudis sires across production environments was caused by changes in ranking from one contemporary group to the next rather than changes in ranking across production environments.

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Influence of sire by year interactions on the direct-maternal genetic correlation for weaning weight of Western Australian Merino sheep

Australian Journal of Agricultural Research ◽

10.1071/ar02235 ◽

2003 ◽

Vol 54 (7) ◽

pp. 723 ◽

Cited By ~ 5

Author(s):

K. V. Konstantinov ◽

F. D. Brien

Keyword(s):

Genetic Correlation ◽

Real Data ◽

Phenotypic Variance ◽

Weaning Weight ◽

Merino Sheep ◽

Environmental Component ◽

Negative Estimate ◽

The Relationship ◽

Western Australian ◽

Interaction Variance

The relationship between the direct-maternal genetic (co)variance σam and sire by year (SY) interactions for weaning weight in Merino sheep was examined through simulation and real data analyses. Weaning weight was simulated using models containing interaction and σam = 0 (S1), interaction and σam < 0 (S2), interaction and σam >�0 (S3), and without interaction and σam < 0 (S4). When S1 data were analysed ignoring interaction, a negative (co)variance was observed and direct and maternal variances were inflated. Analysis of S2 data ignoring σam resulted in deflated direct and maternal variances, inflated residual and interaction variances, and no change for the permanent environmental component. Ignoring the interaction effect in S3 data resulted again in a negative (co)variance component and highly biased genetic parameters. On application to weaning weight of Merino sheep, the model ignoring SY resulted in a direct-maternal genetic correlation of –0.43. The model using both (co)variance and interaction effects fit the data better (P < 0.001). The interaction variance represented 9.2% of the phenotypic variance but explained 86% of the (co)variance between direct and maternal genetic effects estimated ignoring SY.�A small (–0.096) but still negative estimate of the genetic correlation was obtained. The implication of these findings in the context of Central Test Sire Evaluation and Maternal Sire Central Progeny Test Schemes is discussed.

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Scope for genetic evaluation and selection of beef cattle for growth to weaning when birth dates are not recorded

Australian Journal of Agricultural Research ◽

10.1071/ar9940819 ◽

1994 ◽

Vol 45 (4) ◽

pp. 819

Author(s):

K Meyer ◽

HU Graser

Keyword(s):

Beef Cattle ◽

Genetic Correlation ◽

Western Australia ◽

Variance Components ◽

Genetic Parameters ◽

Selection Criterion ◽

Genetic Evaluation ◽

Selection Experiment ◽

Weaning Weight ◽

Selection Of

Estimates of (co)variance components and genetic parameters were obtained for a preweaning weight, recorded between 2 and 5 months after birth, and the subsequent gain till weaning for two herds in a selection experiment in Western Australia. Analyses were carried out both accounting for age at weighing and assuming birth dates and thus ages were unknown. On adjusting for the interval between weighings, preweaning gain appeared to be independent of age and equally heritable to weaning weight. Estimates of the direct genetic correlation between preweaning gain and weaning weight (adjusted for age) were 0.9 or higher, while both genetic and permanent environmental maternal correlations were close to unity. Implications for the use of preweaning weight as an alternative selection criterion to weaning weight when birth dates are not recorded are discussed.

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