Correlation between extremes age at first calving with their productive and reproductive performances in Indian Murrah buffaloes (Bubalusbubalis)
نویسندگان
چکیده
منابع مشابه
Calving day and age at first calving in Angus heifers.
Because of difficulties in data collection and analysis, in most breeds there have been limited ways to evaluate fertility in females on a between-herd basis. The objective of this study was to determine the heritabilities (direct and maternal) for CD (calving day) and AFC (age at first calving) in American Angus heifers and to evaluate the potential for using these traits in genetic improvemen...
متن کاملThe Effect of Age at First Calving and Calving Interval on Productive Life and Lifetime Profit in Korean Holsteins
This study was performed to estimate the effect of age at first calving and first two calving intervals on productive life and life time profit in Korean Holsteins. Reproduction data of Korean Holsteins born from 1998 to 2004 and lactation data from 276,573 cows with birth and last dry date that calved between 2000 and 2010 were used for the analysis. Lifetime profit increased with the days of ...
متن کاملG enetic relationships between calving date, calving interval, age at first calving and type traits in beef cattle
In this paper the genetic relationships between major reproductive traits in beef cattle (Calving Date, Calving Interval and Age at First Calving) and type traits have been estimated to evaluate the usefulness of type classification in predicting reproductive performance in beef cattle. We estimated favourable genetic correlations between Calving Interval and type traits ranging from 2 0.027 to...
متن کاملImmune Response and Productive Performance of Dairy Buffaloes and their Offspring Supplemented with Black Seed Oil
Twenty pregnant buffaloes, eight weeks before the expected calving date, were assigned into two homogeneous groups of 10 animals each, according to their season of lactation (2nd to 8th season of lactation); The first group (G1) were fed on a ration consisting of concentrate feed mixture (22% yellow corn, 35% cotton seed meal, 33% wheat bran, 4% rice bran, 3% molasses, 2% limestone and 1% sodiu...
متن کاملPreliminary Study on Productive and Reproductive Performances of Jamunapari, Black Bengal and Crossbred Goats at Chittagong Region of Bangladesh
The present study was conducted with a view to know the productive and reproductive performance of Jamunapari, Black Bengal and crossbred goats in Chittagong district during the period of May to December 2012. The data on productive and reproductive traits were collected from 324 goats as a whole. In the present study, the birth weight of Jamunapari goats was higher than other crosses. The adul...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Indian Journal of Animal Research
سال: 2018
ISSN: 0976-0555,0367-6722
DOI: 10.18805/ijar.b-3371