Productive and reproductive performance of females F1 Holstein x Gir daughters of proven bulls
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Productive and reproductive performance of females F1 Holstein x Gir daughters of proven bulls Maria Dulcinéia da Costa 1 & Alvimara Felix dos Reis 1 & José Reinaldo Mendes Ruas 1 & Gislane Evangelista Bispo 1 & Vicente Ribeiro Rocha Júnior 1 & Virgílio Mesquita Gomes 1 & Tânia Lino Fiúza 2 Mary Ana Petersen Rodriguez 1 & Mário Henrique França Mourthé 3 & Daniel Ananias de Assis Pires 1
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Received: 13 July 2020 / Accepted: 25 October 2020 # Springer Nature B.V. 2020
Abstract Records of 234 lactations from F1 Holstein x Gyr daughters of proven bulls were used in this study for the evaluation of productive and reproductive characteristics of cows. Data were collected from a private farm located in the municipality of Santo Antônio do Monte, MG, Brazil. The objective of this study was to evaluate the effects of Holstein bull’s PTA milk (predicted transmitting ability) calving year, season, and parity on the productive and reproductive characteristics of F! cows. The productive characteristics analyzed were total milk production (TMP), average daily production (ADP), days in milk (DIM), and milk yield per day of calving interval (MYDCI). The studied reproductive characteristics were service interval (SI), calving interval (CI), and gestation length (GL). The results were subjected to statistical analysis and means for significant effects were compared using Duncan’s test at a significance level of 5%. F1 animals efficiently expressed their genetic potential for milk production with an average total milk production of 7842.61 kg and average daily production of 24.53 kg. Means for days in milk, milk yield per day of calving interval, service interval, calving interval, and gestation length were 322.52 days, 20.73 kg, 106.0 days, 383.23 days, and 276.18 days, respectively. Properly managed F1 Holstein x Gyr daughters of proven bulls fed a balanced diet efficiently expressed their genetic potential for milk production without adverse effects on reproduction. Moreover, Holstein x Gyr cows should be selected based on parents’ PTA for milk traits and other factors such as environmental conditions and management. Keywords Crossbred animals . Milk production . Productive efficiency . PTA milk
* Alvimara Felix dos Reis [email protected]
Mary Ana Petersen Rodriguez [email protected]
Maria Dulcinéia da Costa [email protected]
Mário Henrique França Mourthé [email protected]
José Reinaldo Mendes Ruas [email protected]
Daniel Ananias de Assis Pires [email protected]
Gislane Evangelista Bispo [email protected]
1
Universidade Estadual de Montes Claros, Departamento de Ciências Agrárias, 91, Campus de Janaúba/Unimontes, Avenida Reinaldo Viana, 2630 - E-mail: [email protected], Janaúba 39448-524, MG, Brazil
2
Médica Veterinária, Fazenda Canoas, Brazil
3
Universidade Federal de Minas Gerais- UFMG, Belo Horizonte, MG, Brazil
Vicente Ribeiro Rocha Júnior [email protected] Virgílio Mesquita Gomes [email protected] Tânia Lino Fiúza faze
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