Xorijdan keltirilgan Germaniya seleksiyasiga mansub golshtin zotli sigirlarning turli naslli buqalar avlodi bo‘yicha i laktatsiyadagi sut mahsuldorligi va xo‘jalik uchun foydali belgilarini baholash

Madraximov, Shodlik, Davlatnazarov, Bexruz

Agro ILM · 2026-yil

Annotatsiya

This article presents the results of a comprehensive assessment of the milk productivity and economically beneficial traits of German-bred Holstein cows imported from abroad, broken down by offspring of breeding bulls of different lines during the first lactation period. The research was conducted between 2025 and 2026 at the «Tumaris Nur» farm in the Urgench district of the Khorezm region. For the study, 36 heads of first-born calves were selected, 12 heads each from German breeding bulls named Alfons, Jasper, and Geboren. Milk yields for 305 days of first lactation, milk fat content and protein content, fat and protein yield, 4% fat milk yield, live weight, and milk yield coefficient of the cows were studied. According to the research results, Jasper’s daughters produced 6089.6 kg of milk, which was 506.9 and 167.5 kg higher than those of Alfons and Geboren, respectively (P<0.05). High results were also recorded in the daughters of Jasper’s buffalo in terms of milk fat and protein yield, 4% milk, live weight, and milk yield. A high positive correlation was identified between milk quantity and fat and protein yield, 4% milk, and milk yield. The correlation coefficient for milk yield in mother-daughter pairs was 0.417; 0.639 and 0.185 respectively. The inheritance coefficient of milk yield based on mother-daughter regression was 0.294; 0.324 and 0.268 respectively. The highest heredity was noted in the daughters of the Jasper bull. The results obtained showed that the daughters obtained from Jasper bulls are promising from a breeding perspective in terms of milk productivity.

Maqola ma’lumotlari
MualliflarMadraximov, Shodlik, Davlatnazarov, Bexruz
JurnalAgro ILM
NashriyotO‘zbekiston qishloq xo‘jaligi jurnali ilmiy ilovasi
ISSN2091-5616
Nashr sanasi2026-09-19
Jild128
Son7
Betlar98-102
TilO‘zbek
Ilmiy sohaQishloq xo‘jaligi
DOI10.67048/qxju2026ai128iss7m1008
Indeksga qo‘shilgan2026-09-20

DOI: 10.67048/qxju2026ai128iss7m1008 · Maqolaning asl sahifasi

Kalit so‘zlar

Holstein breed, German breeding, sire, progeny, first lactation, milk yield, correlation, regression, heritability, h2, selection, голштинская порода, немецкая селекция, бык-производитель, потомство, первая лактaция, молочная продуктивность, корреляция, регрессия, наследуемость, h2, селекция, Golshtin, Germaniya seleksiyasi, buqa, avlod, I laktatsiya, sut mahsuldorligi, korrelyatsiya, regressiya, irsiylanish, h², seleksiya

Ilmiy soha

Qishloq xo‘jaligi

Iqtibos keltirish

APAMadraximov, Shodlik, & Davlatnazarov, Bexruz (2026). XORIJDAN KELTIRILGAN GERMANIYA SELEKSIYASIGA MANSUB GOLSHTIN ZOTLI SIGIRLARNING TURLI NASLLI BUQALAR AVLODI BO‘YICHA I LAKTATSIYADAGI SUT MAHSULDORLIGI VA XO‘JALIK UCHUN FOYDALI BELGILARINI BAHOLASH. Agro ILM, 128(7), 98-102. https://doi.org/10.67048/qxju2026ai128iss7m1008
GOST (OAK)Madraximov, Shodlik, Davlatnazarov, Bexruz XORIJDAN KELTIRILGAN GERMANIYA SELEKSIYASIGA MANSUB GOLSHTIN ZOTLI SIGIRLARNING TURLI NASLLI BUQALAR AVLODI BO‘YICHA I LAKTATSIYADAGI SUT MAHSULDORLIGI VA XO‘JALIK UCHUN FOYDALI BELGILARINI BAHOLASH // Agro ILM. – 2026. – T. 128, № 7. – B. 98-102. – DOI: 10.67048/qxju2026ai128iss7m1008.
MLAMadraximov, Shodlik, and Davlatnazarov, Bexruz. “XORIJDAN KELTIRILGAN GERMANIYA SELEKSIYASIGA MANSUB GOLSHTIN ZOTLI SIGIRLARNING TURLI NASLLI BUQALAR AVLODI BO‘YICHA I LAKTATSIYADAGI SUT MAHSULDORLIGI VA XO‘JALIK UCHUN FOYDALI BELGILARINI BAHOLASH.” Agro ILM, 128(7), 98-102, 2026. https://doi.org/10.67048/qxju2026ai128iss7m1008
ChicagoMadraximov, Shodlik, and Davlatnazarov, Bexruz. “XORIJDAN KELTIRILGAN GERMANIYA SELEKSIYASIGA MANSUB GOLSHTIN ZOTLI SIGIRLARNING TURLI NASLLI BUQALAR AVLODI BO‘YICHA I LAKTATSIYADAGI SUT MAHSULDORLIGI VA XO‘JALIK UCHUN FOYDALI BELGILARINI BAHOLASH.” Agro ILM, 128(7), 98-102 (2026). https://doi.org/10.67048/qxju2026ai128iss7m1008
HarvardMadraximov, Shodlik, and Davlatnazarov, Bexruz (2026) ‘XORIJDAN KELTIRILGAN GERMANIYA SELEKSIYASIGA MANSUB GOLSHTIN ZOTLI SIGIRLARNING TURLI NASLLI BUQALAR AVLODI BO‘YICHA I LAKTATSIYADAGI SUT MAHSULDORLIGI VA XO‘JALIK UCHUN FOYDALI BELGILARINI BAHOLASH’, Agro ILM, 128(7), 98-102. https://doi.org/10.67048/qxju2026ai128iss7m1008
BibTeX
@article{madraximovshodlik2026,
  title = {XORIJDAN KELTIRILGAN GERMANIYA SELEKSIYASIGA MANSUB GOLSHTIN ZOTLI SIGIRLARNING TURLI NASLLI BUQALAR AVLODI BO‘YICHA I LAKTATSIYADAGI SUT MAHSULDORLIGI VA XO‘JALIK UCHUN FOYDALI BELGILARINI BAHOLASH},
  author = {Madraximov, Shodlik and Davlatnazarov, Bexruz},
  journal = {Agro ILM},
  year = {2026},
  volume = {128},
  number = {7},
  pages = {98-102},
  doi = {10.67048/qxju2026ai128iss7m1008},
  url = {https://doi.org/10.67048/qxju2026ai128iss7m1008}
}

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