|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
03/04/1996 |
|
Data da última atualização: |
02/06/2023 |
|
Autoria: |
SAHANI, M. S.; BAPNA, D. L.; ARORA, A. L. |
|
Título: |
Factors influencing different body weights in Karakul sheep under North West arido region. |
|
Ano de publicação: |
1993 |
|
Fonte/Imprenta: |
Livestock Adviser, v. 18, n. 3, p. 6-11, 1993. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Thalli is native sheep breed of Thall area of the Punjab, Pakistan. Data on 17030 birth records of 5421 Thalli sheepmaintained at Livestock Experiment Station, Rakh Ghulaman, district Bhakkar during 1975-2004 were utilized in thepresent study with the aim to evaluate the performance of Thalli sheep in Pakistan. The genetic parameter estimation wasperformed using REML procedure by fitting an Individual Animal Model. Birth weight with an average of 4.11±0.82 kg,was significantly affected by year, type of birth, sex and age of the dam but season of birth was an in significant effect onthe birth weight. Weight at 60 and 90-days of age averaged 11.58±3.57 and 14.92±4.56 kg, respectively. These weightswere affected by year and season of birth, birth weight. Type of birth and sex had significant effect on weight at 60 daysof age where as age of the dam had non-significant effect on weight at 60 days of age. Age of the dam significantlyaffected 90-day weight. Sex and type of birth had non-significant effect on 90 days weight. The weaning weight was18.95±4.12 kg and was affected by year and season of birth, sex of lamb. No significant effects of type of birth, birthweight and age of dam on weaning weight were observed. The direct heritability estimate of birth weight was0.067±0.01. The heritability estimates for 60- and 90-day weight were 0.116±0.01 and 0.18±0.01, respectively. Theheritability estimate for weaning weight was 0.03±0.11. Genetic correlation between birth weight and weaning weightwas negatively low with an estimate of 0.045±0.003. The low estimates of heritability for various performance traitsindicated the presence of less additive genetic variance and large environmental variances. Hence improvement in thetraits through selection may be limited MenosThalli is native sheep breed of Thall area of the Punjab, Pakistan. Data on 17030 birth records of 5421 Thalli sheepmaintained at Livestock Experiment Station, Rakh Ghulaman, district Bhakkar during 1975-2004 were utilized in thepresent study with the aim to evaluate the performance of Thalli sheep in Pakistan. The genetic parameter estimation wasperformed using REML procedure by fitting an Individual Animal Model. Birth weight with an average of 4.11±0.82 kg,was significantly affected by year, type of birth, sex and age of the dam but season of birth was an in significant effect onthe birth weight. Weight at 60 and 90-days of age averaged 11.58±3.57 and 14.92±4.56 kg, respectively. These weightswere affected by year and season of birth, birth weight. Type of birth and sex had significant effect on weight at 60 daysof age where as age of the dam had non-significant effect on weight at 60 days of age. Age of the dam significantlyaffected 90-day weight. Sex and type of birth had non-significant effect on 90 days weight. The weaning weight was18.95±4.12 kg and was affected by year and season of birth, sex of lamb. No significant effects of type of birth, birthweight and age of dam on weaning weight were observed. The direct heritability estimate of birth weight was0.067±0.01. The heritability estimates for 60- and 90-day weight were 0.116±0.01 and 0.18±0.01, respectively. Theheritability estimate for weaning weight was 0.03±0.11. Genetic correlation between birth weight and wea... Mostrar Tudo |
|
Palavras-Chave: |
Genetic factors; Peso corporal; Pre-weaning; Thalli. |
|
Thesagro: |
Melhoramento; Ovino; Raça. |
|
Thesaurus Nal: |
Body weight; Breeding and Genetic Improvement; Karakul; Pakistan; Sheep. |
|
Categoria do assunto: |
G Melhoramento Genético |
|
Marc: |
LEADER 02565naa a2200289 a 4500
001 1523347
005 2023-06-02
008 1993 bl uuuu u00u1 u #d
100 1 $aSAHANI, M. S.
245 $aFactors influencing different body weights in Karakul sheep under North West arido region.$h[electronic resource]
260 $c1993
520 $aThalli is native sheep breed of Thall area of the Punjab, Pakistan. Data on 17030 birth records of 5421 Thalli sheepmaintained at Livestock Experiment Station, Rakh Ghulaman, district Bhakkar during 1975-2004 were utilized in thepresent study with the aim to evaluate the performance of Thalli sheep in Pakistan. The genetic parameter estimation wasperformed using REML procedure by fitting an Individual Animal Model. Birth weight with an average of 4.11±0.82 kg,was significantly affected by year, type of birth, sex and age of the dam but season of birth was an in significant effect onthe birth weight. Weight at 60 and 90-days of age averaged 11.58±3.57 and 14.92±4.56 kg, respectively. These weightswere affected by year and season of birth, birth weight. Type of birth and sex had significant effect on weight at 60 daysof age where as age of the dam had non-significant effect on weight at 60 days of age. Age of the dam significantlyaffected 90-day weight. Sex and type of birth had non-significant effect on 90 days weight. The weaning weight was18.95±4.12 kg and was affected by year and season of birth, sex of lamb. No significant effects of type of birth, birthweight and age of dam on weaning weight were observed. The direct heritability estimate of birth weight was0.067±0.01. The heritability estimates for 60- and 90-day weight were 0.116±0.01 and 0.18±0.01, respectively. Theheritability estimate for weaning weight was 0.03±0.11. Genetic correlation between birth weight and weaning weightwas negatively low with an estimate of 0.045±0.003. The low estimates of heritability for various performance traitsindicated the presence of less additive genetic variance and large environmental variances. Hence improvement in thetraits through selection may be limited
650 $aBody weight
650 $aBreeding and Genetic Improvement
650 $aKarakul
650 $aPakistan
650 $aSheep
650 $aMelhoramento
650 $aOvino
650 $aRaça
653 $aGenetic factors
653 $aPeso corporal
653 $aPre-weaning
653 $aThalli
700 1 $aBAPNA, D. L.
700 1 $aARORA, A. L.
773 $tLivestock Adviser$gv. 18, n. 3, p. 6-11, 1993.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
