Seasonal influence of age at first calving on genetic variation and subsequent reproductive performances in Murrah buffaloes

2019 ◽  
pp. 1-14
Author(s):  
Ranjeet Verma ◽  
Kennady Vijayalakshmy ◽  
Meenakshi Virmani ◽  
Sanjeev Kumar ◽  
Ashutosh Verma
Keyword(s):  
Genetic Variation ◽  
Seasonal Influence ◽  
Age At First Calving ◽  
Murrah Buffaloes

scholarly journals Association between age at first calving, first lactation traits and lifetime productivity in Murrah buffaloes

2022 ◽  
Author(s):  
Pooja Tamboli ◽  
Anurag Bharadwaj ◽  
Amit Kumar Chaurasiya ◽  
Yogesh Chandrakant Bangar ◽  
A Jerome
Keyword(s):  
Age At First Calving ◽  
Murrah Buffaloes

Study on ages at first mating and calving of Murrah buffaloes in hot and humid climate of Tamil Nadu, India

2015 ◽  
Author(s):  
A. K. Thiruvenkadan ◽  
S. Panneerselvam ◽  
N. Murali
Keyword(s):  
Milk Yield ◽  
Tamil Nadu ◽  
Coastal Region ◽  
Dry Period ◽  
Humid Climate ◽  
Age At First Calving ◽  
Murrah Buffaloes ◽  
Lactation Length ◽  
Service Period ◽  
Consequent Increase

Data on ages at first mating and first calving of Murrah buffaloes to identify the effect of various non-genetic factors on these traits. Period and season were the fixed environmental effects considered for both the traits studied. The overall least-squares means for ages at first mating and calving were 1222.3 ± 11.0 and 1578.7 ± 20.3 days respectively. Period had highly significant (Pe at first calving with peak yield, days to attain peak yield, 305-day milk yield, lactation length, lactation milk yield, milk yield per day of lactation, service period, calving interval, dry period and number of services per conception were -0.214 ± 0.32, 0.013 ± 0.31, 0.089 ± 0.33, 0.584 ± 0.47, 0.166 ± 0.35, -0.177 ± 0.30, 0.576 ± 0.53, 0.563 ± 0.55, 0.276 ± 0.49 and 0.944 ± 0.83 respectively. The study revealed that the ages at first mating and calving observed in Murrah buffaloes at coastal region of Tamil Nadu is comparable to those reported in its breeding tract and elsewhere in India. A negative genetic correlation between age at first calving and milk yield per day of lactation indicated that the selection based on milk yield per day of lactation would lead to reduction in age at first calving with consequent increase of milk yield per day of lactation in future generations.

Effect of Season and Age at First Calving on Early Performance Traits in Murrah Buffaloes

2020 ◽  
Vol 6 (02) ◽  
Author(s):  
GURPREET KOUR ◽  
RAMAN NARANG ◽  
AMANDEEP SINGH
Keyword(s):  
Genetic Factors ◽  
Calving Interval ◽  
Dry Period ◽  
Age At First Calving ◽  
Murrah Buffaloes ◽  
Lactation Length ◽  
Service Period ◽  
Productive Traits ◽  
Early Performance ◽  
Animal Sciences

The present investigation was carried on 659 Murrah buffaloes, sired by 188 bulls, maintained at Directorate of Livestock Farms, Guru AngadDev Veterinary and Animal Sciences University, Ludhiana, for the duration of 27 years (1991-2017). The purpose of this study was to investigate the effect of non-genetic factors like season and age at first calving on early reproductive and productive traits like age at first calving (AFC), first service period (FSP), first calving interval (FCI) and age at puberty (AAP), 305 day milk yield (305MY), first lactation length (FLL), first peak yield (FPY), first days to attain peak yield (DPY) and first dry period (FDP). Season of calving had highly significant influence on FSP, FCI and FDP, significant effect on AFC, AAP, 305MY, FLL and FPY and non-significant effect on DPY. Age at first calving had non-significant effect on all the studied traits.

Correlation between extremes age at first calving with their productive and reproductive performances in Indian Murrah buffaloes (Bubalusbubalis)

2018 ◽  
Author(s):  
Ranjeet Verma ◽  
Inderjeet Singh ◽  
Ashok K. Balhara ◽  
Varij Nayan ◽  
Rakesh Kumar Sharma ◽  
...  
Keyword(s):  
Calving Interval ◽  
Dry Period ◽  
Important Indicator ◽  
Age At First Calving ◽  
Murrah Buffaloes ◽  
Lactation Length ◽  
Service Period ◽  
Performance Traits ◽  
Group 2 ◽  
Group 1

The dairy economics is greatly affected by the age at first calving as it is an important indicator of precocity and fertility. The present study was carried out to deduce the important productive and reproductive performance traits related to their extremes age at first calving in Murrah buffaloes. Recorded the data of reproductive and productive performances trait of Murrah buffaloes maintained at the animal farm section, ICAR-Central Institute for Research on Buffaloes, Hisar, India during the period of last fifteen year (2001-15). The data of 2753 buffaloes were screened out, on the basis of age at first calving (AFC) categorized into two extreme group. Only 88 out of 2753 buffaloes showed the extremes AFC and categorized as group 1 (n=17 in first parity, 12 in second parity) and group 2 (n=71 in first parity, 36 in second parity) having £36 and ³48 months of AFC respectively. The extreme AFC with their performance traits viz. service period, calving interval, dry period, lactation length and milk yields were included in the analysis. The mean service period, calving interval, dry period was lower in group 1 whereas lactation length and milk yields no differences in between groups. The low milk production was observed in first lactation irrespective to their groups. The extreme AFC was not significantly associated with their performance traits (service period, calving interval, dry period, lactation length and milk yields) in both within and between groups (p >0.05) whereas service period significantly associated with calving intervals (p less than 0.01).

Seasonal influence on thyroidal response to thyrotrophin-releasing hormone in cattle and buffaloes

1986 ◽  
Vol 108 (1) ◽  
pp. 57-61 ◽  
Author(s):  
M. L. Khurana ◽  
M. L. Madan
Keyword(s):  
Environmental Conditions ◽  
Plasma Levels ◽  
Biphasic Response ◽  
Seasonal Influence ◽  
Thyrotrophin Releasing Hormone ◽  
Releasing Hormone ◽  
Murrah Buffaloes ◽  
Significant Difference

ABSTRACT The effect of thyrotrophin-releasing hormone (TRH) on the circulating plasma levels of tri-iodothyronine (T3) and thyroxine (T4) was determined in the same group of animals (four cattle and four Murrah buffaloes) during hot dry (HD), hot humid (HH) and cold environmental conditions. Plasma T3 and T4 concentrations were measured during 2 h before and up to 12 h after the administration of TRH (200 μg i.v.). In the preinjection period in both cattle and buffaloes T3 levels were significantly lower in HH conditions. No significant difference in basal (preinjection) T3 levels was observed during HD and cold seasons in cattle. The highest T3 levels were obtained in buffaloes during HD season with intermediate values during the cold months. Plasma T4 levels in these animals were reversed during HD and HH months. In both cattle and buffaloes there was a biphasic response of T3 and T4 to TRH treatment and this varied with time and in size. The season significantly affected the T3 response to TRH in cattle and buffaloes but the T4 response differed in the two species. The ratio of T4/T3 was higher during HH condition compared with other seasons in both cattle and buffaloes. The climate significantly affected the thyroidal response to TRH. J. Endocr. (1986) 108, 57–61

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