FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS
The data on 659 and 681 records of different crosses of Holstein-Friesian X Sahiwal crossbreds on age at maturity (first observed heat) and age at first conception respectively were analyzed. The data was spread over 17 years from 1974 to 1990. The overall least squares means and SE for age at matur...
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| Format: | Article |
| Language: | English |
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University of Agriculture, Faisalabad
2000-01-01
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| Series: | Pakistan Veterinary Journal |
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| Online Access: | http://pvj.com.pk/abstract/20_1/10.htm |
| _version_ | 1818145818034569216 |
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| author | M. Rafique, K.R. Chohan1 and Q.Z. Chaudhry |
| author_facet | M. Rafique, K.R. Chohan1 and Q.Z. Chaudhry |
| author_sort | M. Rafique, K.R. Chohan1 and Q.Z. Chaudhry |
| collection | DOAJ |
| description | The data on 659 and 681 records of different crosses of Holstein-Friesian X Sahiwal crossbreds on age at maturity (first observed heat) and age at first conception respectively were analyzed. The data was spread over 17 years from 1974 to 1990. The overall least squares means and SE for age at maturity and age at 1st conception were 618.42, 6.78 and 697.51, 8.03 days, respectively. The significant effect of year of birth and genetic groups was observed in both the traits while the effect of season of birth was non significant for age at I SI conception and significant for age at maturity .It was observed that 3/4 crosses has significantly lower age for both the traits. |
| first_indexed | 2024-12-11T12:09:30Z |
| format | Article |
| id | doaj.art-ef4cc8d590a9405ebbe7e087d03ac036 |
| institution | Directory Open Access Journal |
| issn | 0253-8318 |
| language | English |
| last_indexed | 2024-12-11T12:09:30Z |
| publishDate | 2000-01-01 |
| publisher | University of Agriculture, Faisalabad |
| record_format | Article |
| series | Pakistan Veterinary Journal |
| spelling | doaj.art-ef4cc8d590a9405ebbe7e087d03ac0362022-12-22T01:07:51ZengUniversity of Agriculture, FaisalabadPakistan Veterinary Journal0253-83182000-01-012014042FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDSM. Rafique, K.R. Chohan1 and Q.Z. ChaudhryThe data on 659 and 681 records of different crosses of Holstein-Friesian X Sahiwal crossbreds on age at maturity (first observed heat) and age at first conception respectively were analyzed. The data was spread over 17 years from 1974 to 1990. The overall least squares means and SE for age at maturity and age at 1st conception were 618.42, 6.78 and 697.51, 8.03 days, respectively. The significant effect of year of birth and genetic groups was observed in both the traits while the effect of season of birth was non significant for age at I SI conception and significant for age at maturity .It was observed that 3/4 crosses has significantly lower age for both the traits.http://pvj.com.pk/abstract/20_1/10.htmHolstein-Friesian X Sahiwal cowsmaturity ageconceptionfactors affecting |
| spellingShingle | M. Rafique, K.R. Chohan1 and Q.Z. Chaudhry FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS Pakistan Veterinary Journal Holstein-Friesian X Sahiwal cows maturity age conception factors affecting |
| title | FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS |
| title_full | FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS |
| title_fullStr | FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS |
| title_full_unstemmed | FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS |
| title_short | FACTORS AFFECTING AGE AT MATURITY AND AGE AT FIRST CONCEPTION IN HOLSTEIN-FRIESIAN X SAHIWAL CROSSBREDS |
| title_sort | factors affecting age at maturity and age at first conception in holstein friesian x sahiwal crossbreds |
| topic | Holstein-Friesian X Sahiwal cows maturity age conception factors affecting |
| url | http://pvj.com.pk/abstract/20_1/10.htm |
| work_keys_str_mv | AT mrafiquekrchohan1andqzchaudhry factorsaffectingageatmaturityandageatfirstconceptioninholsteinfriesianxsahiwalcrossbreds |