Abstract:
The aim of the study was to evaluate the productive and reproductive performances of
crossbred and indigenous cows through artificial insemination. The study was
conducted at farmer’s level in different areas in Gobindaganj upazila of Gaibandha
district from January 2021 to December 2021. Based on the goal of the study, a total
of 100 dairy cows were examined across three genotypes. According to their genetic
composition selected genotypes were Friesian cross (F×I=45), Sahiwal cross
(SL×I=35) and Indigenous (I=20). The three breeds differ significantly in terms of
reproductive traits. The results showed that shortest age at puberty (20.77±0.10
month), age at first service (22.65±0.22 month), age at first calving (31.95±0.30
month), gestation period (278.44±0.97 days) and calving interval (404.20±2.31 days)
in Friesian cross. On the contrary longest age at puberty, age at first service, age at
first calving, gestation period and calving interval were 25.58±0.11 month,
27.08±0.11 month, 37.01±0.34 month, 284.30±1.08 and 453.30±2.91 days found in
indigenous cow, respectively. There is no significant effect of service per conception
between indigenous and crossbred cows. Where indigenous cows need minimum
(1.20±0.09) services per conception though Sahiwal cross required for maximum
(1.56±0.13) service per conception. Regarding productive attributes, significant
variations between indigenous and crossbred cows were identified. It was observed
that highest birth weight, milk yield per day and lactation length were 25.08±0.58 kg,
13.44±.54 liter and 287.72±2.52 days, respectively found in Friesian cross. On the
other side lowest birth weight, milk yield per day and lactation length were
13.55±0.98 kg, 2.30±0.12 liter and 229.3±2.52 days, respectively observed in
indigenous. It was revealed that the Friesian cross is superior in relation to milk
production and lactation length. From the above point of view, it could be concluded
that Friesian cross cows might be suitable for profitable dairy farming compared to
other breed in this study area. However, further study with greater sample sizes
covering more different management systems would be required to describe a better
inference in this consideration.
Description:
A Thesis
Submitted to the Department of Animal Nutrition, Genetics and Breeding
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements for the degree of
MASTER OF SCIENCE (MS)
IN
ANIMAL BREEDING AND GENETICS
