Turli genotipga mansub sigirlarning puştdorlik körsatkiçlari

Reproductive performance indicators of cows of different genotypes

Article Sidebar

Cover: Current issues in veterinary medicine and animal husbandry and their solutions (Nukus, 13 November 2026)
PDF (Uzbek)
Published: 2026-11-13
DOI: https://doi.org/10.66073/ReFocus-Conf/1311064
Keywords:
Red Steppe breed, Holstein breed, crossbred cows, genotype, reproductive performance, service period, calving interval, conception rate, insemination index

Main Article Content

Xurshid Abdirafievich Mamatov
Nukus Branch of Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
https://orcid.org/0009-0003-3063-2703 (unauthenticated)
Shodlik Nazarovich Madraximov
Nukus Branch of Samarkand State University of Veterinary Medicine, Animal Husbandry and Biotechnologies
https://orcid.org/0009-0005-9233-0748 (unauthenticated)

Abstract

The study presents a comparative analysis of selected reproductive performance indicators in Red Steppe cows, Holstein cows, and first-generation (F1) crossbred cows with a genotype of ½ Holstein × ½ Red Steppe. Each group consisted of 15 cows. The parameters analyzed included age and live weight at first insemination, gestation length, age and live weight at first calving, service period, calving interval, conception rate at first insemination, and insemination index. According to the study results, the conception rate at first insemination in first-generation crossbred cows was 81.2%, which was 0.9 percentage points higher than that in Red Steppe cows (Group I) and 2.8 percentage points higher than that in Holstein cows (Group II). The lowest insemination index was also recorded in the first-generation (F1) crossbred cows, at 1.22.

Article Details

Issue

Vol. 1 No. 10 (2026): Current issues in veterinary medicine and animal husbandry and their solutions

Section

Animal husbandry and animal productivity
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Mamatov, X. A., & Madraximov, S. N. (2026). Reproductive performance indicators of cows of different genotypes. Partner Conferences of the International Scientific Journal Research Focus, 1(10), 323-327. https://doi.org/10.66073/ReFocus-Conf/1311064

References

Акмалханов Ш.А., Жумадуллаев Б.Х., Комилов А., Иманқулова К., Гулматова Н. Четдан келтирилган қорамолларни озиқлантиришнинг маҳсулдорлик ва пуштдорлик хусусиятларига таъсири. //Ж. “AGROILM” 2019 й., №2 (58), 43-44 б.

Аширов Б. Турли конституция типидаги сигирларнинг лактациясининг кечиш хусусиятлари. // Зооветеринария. Ж. Тошкент. 2012. № 3. 27-28 б.

Алиев Р.Г., Алипанахов А.Б. Особенности коров красной степной породи и её помесей. Ж. “Зоотехния”, № 9, 2005. С. 8-9.

Дадажонов А., Мақсудов И., Аманбаева Н. Турли генотипли қора-ола зотли биринчи туғим сигирларининг сут маҳсулдорлиги. Республика илмий-амалий конференция тезислари. Т.,2011, 43-44 б.

Mamatov X.A., Madrahimov Ş.N. (2026). Qoraqolpoğiston şaroitida monbelyard, golştin zotli sigirlar va duragaylarning sut mahsuldorligi AGRO ILM – ÖZBEKISTON QIŞLOQ VA SUV XÖJALIGI ÇORVAÇILIK, №5(126) 96-98 DOI: https://doi.org/10.67048/qxju2026AI126iss5m41

Mamatov X.A., Madraximov Ş.N. Turli genotipga mansub qizil çöl zotli sigirlarning I laktatsiyadagi sut mahsuldorligini baholaş. //J.Çorvaçilik va naslçilik işi” 2026-yil №2(48), Toşkent, 11-13-b.

Рўзибоев Н.Р. Зависимость молочной продуктивности коров от их живой массы. Ж.// Молочное и мясное скотоводства, №4, 2014, с.32-33.

Esanov A.Ş., Dosmuxamedova M.X. // Turli genotipga mansub sigirlarning laktatsiya xususiyatlari. // Çorvaçilik va naslçilik işi. 2020. № 2 (13). 8-10 б