Evaluation of sexed semen-based artificial insemination in Tharparkar cattle under organized farm condition.

Autor: Patra MK; Livestock Production and Management Section, ICAR-Indian Veterinary Research Institute, Izatnagar, India.; Animal Reproduction Division, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Sasidharan JK; Animal Reproduction Division, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Rajput AS; Livestock Production and Management Section, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Sharma R; Animal Reproduction Division, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Reza MRA; Livestock Production and Management Section, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Das GK; Animal Reproduction Division, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Tomar AKS; Livestock Production and Management Section, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Ghosh SK; Animal Reproduction Division, ICAR-Indian Veterinary Research Institute, Izatnagar, India., Gaur GK; Livestock Production and Management Section, ICAR-Indian Veterinary Research Institute, Izatnagar, India.
Jazyk: angličtina
Zdroj: Reproduction in domestic animals = Zuchthygiene [Reprod Domest Anim] 2023 Nov; Vol. 58 (11), pp. 1622-1627. Date of Electronic Publication: 2023 Sep 25.
DOI: 10.1111/rda.14480
Abstrakt: Sexed semen facilitates additional female calf production for the expansion of a herd at a faster rate and also curtails the surplus production of unwanted male calves. A study was conducted to evaluate the performance of sexed semen in indigenous Tharparkar cows based on 114 artificial inseminations (AI) performed at natural oestrus using two protocols i.e., single AI (n = 48) and double AI (n = 66). Overall, the first service conception rate (CR) was significantly higher in double (53.0%) than single (33.3%) AI protocol. The odds ratio of conception rate in double AI was 2.26 (χ 2  = 4.4, df = 1, p = .04) with respect to single AI. The time that elapsed since the detection of oestrus to insemination was also analysed. In a single AI protocol, the CR was higher (p < .05) at 16 h (54.6%) than insemination at 8 h (27.0%) following the onset of oestrus. Yet, the CR using double AI protocol did not differ (p = .73) significantly when AIs were performed either at 8 h and 24 h (51.9%) or 16 h and 24 h (57.1%) post onset of oestrus. Besides, like the single AI protocol, the parity of the animals also influenced the CR, being higher in heifers (n = 22) than those of parous (n = 92) cows (72.73 vs. 40.43%, χ 2  = 7.48, df = 1, p = .006) in the present study. The odds ratio of conception in heifers was 3.93 with respect to parous cows. Overall, the birth of female calf was 91.7%. In conclusion, the present study indicates a future promise of the sexed semen for the production of more female offspring from Tharparkar cattle.
(© 2023 Wiley-VCH GmbH. Published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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