TITLE

ESTIMATION OF GENETIC TRENDS FOR ECONOMIC TRAITS IN CROSSBRED CATTLE BY USING REGRESSION METHODS

AUTHOR(S)
Chaudhari, M.; Kumar, R.; Khanna, A. S.; Dalal, D. S.; Khanna, S.; Goyal, J.
PUB. DATE
December 2014
SOURCE
Indian Journal of Animal Research;Dec2014, Vol. 48 Issue 6, p527
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The present study was conducted on 782 crossbred cows sired by 35 bulls, maintained over the period from 1985 to 2009. The data were analyzed to estimate genetic, phenotypic and environmental changes in characters of economic importance which might have taken place during the several years of selective breeding practiced in the herd. The economic traits studied were first lactation milk yield, first lactation milk yield per day of lactation length and first lactation milk yield per day of calving interval in kg and age at first calving, first lactation length, first calving interval, first service period and first dry period in days. The average genetic changes in a given trait were estimated by four methods. Phenotypic trends were negligible for all the traits except age at first calving while, genetic trends were in desirable direction. Comparison of methods of estimation of genetic trend showed that adjustments for biases due to non-random allotment of dams with respect to their age and merit suggested by Powell and Freeman were useful for increasing the precision of the estimates. This method showed lower magnitude of standard error in comparison to other methods. Method- III showed lower standard error than method-IV. Hence, method -III was the best method of estimation of genetic trends.
ACCESSION #
100039950

 

Related Articles

  • ESTIMATION OF GENETIC AND PHENOTYPIC TRENDS FROM PRODUCTION EFFICIENCY TRAITS IN MURRAH BUFFALOES. Chakraborty, D.; Dhaka, S. S. // Indian Journal of Animal Research;Dec2012, Vol. 46 Issue 4, p410 

    Genetic and phenotypic trends were estimated for first lactation milk yield (FLY), first lactation peak yield (FPY), average yield per day of lactation (AYL), lactation milk yield per day of first calving interval (MCI) and lactation milk yield per day of age at second calving (MSC). Genetic...

  • ENERGY REQUIREMENTS OF LACTATING CROSSBRED CATTLE (Bos indicus). Saha, Debashis; Gupta, R. S.; Baghel, R. P. S. // International Journal of Advanced Biological Research;2013, Vol. 3 Issue 4, p527 

    The present investigation has been carried out to determine the energy requirement of lactating crossbred cattle (50% Holstein Friesian X 50% Sahiwal) fed 0, 50 and 100 levels of di-ammonium phosphate in the mineral mixture of concentrates. Eighteen lactating crossbred cattle of nearly the same...

  • STUDIES ON SOME GENETIC AND NONGENETIC FACTORS AFFECTING LACTATION PERIOD IN GIR COWS. Rajoriya, Ravi; Tomar, S. S.; Saha, D. N.; Rajoriya, Shweta; Kumar, Amit // Indian Journal of Veterinary Sciences & Biotechnology;2015, Vol. 10 Issue 4, p32 

    A total of 599 records of lactation period on 191 Gir cows maintained at Kasturba Gandhi Memorial Trust, Indore, M. P. over a period of 36 years (1974-2009) were analyzed by least squares technique of fitting constants to estimate the effect of sire, period of calving, season of calving, parity...

  • Factors affecting weight and age at first calving, first lactation milk yield in Gir cows. Singh, Basdev; Sawant, Pushkraj; Sawant, Dhruvaraj; Todkar, Sachin; Jain, Richa // Indian Journal of Animal Research;Oct2016, Vol. 50 Issue 5, p804 

    The present study was undertaken on data of 113 Gir cows maintained at Kasturba Gram Dairy Farm, Indore, Madhya Pradesh, India over a period of 18 years from 1995 to 2012, based on age at first calving. The overall means for weight at first calving (WFC), age at first calving (AFC), and first...

  • Characterisation of Mizoram Native Cattle of Indian Origin. Pundir, R. K.; Singh, P. K.; Sadana, D. K.; Dangi, P. S.; Lalhruaipuii; Vanlalpeka, K.; Laldinthara, F.; Singh, N. M.; Andrew, L. // Journal of Animal Research;Dec2015, Vol. 5 Issue 4, p801 

    A total of 33 farmers from 11 villages of Champhai and Kolasib districts were interviewed and 237 animals of different age and sex were recorded for physical and morphometric characteristics and performance to characterise indigenous cattle of Mizoram state. Based on the maximum number of...

  • Seasonal Influences on Milk Yield and Composition Dynamics during a Normal Lactation in Dairy Cows: Milk Yield, Fat and Protein Precentage. Baul, Simona; Cziszter, Ludovic-Toma; Acatincai, Stelian; Gavojdian, Dinu; Erina, Silvia; Marcu, Adela; Buzamat, Genoveva; Răducan, Gabriel George // Scientific Papers: Animal Science & Biotechnologies / Lucrari St;2014, Vol. 47 Issue 1, p260 

    Researches were made on 125 lactations from Romanian Black Spotted cows and aimed to study the evolution of the interval between calving on milk yield and quality. Data were recorded and statistically analyzed by means of ANOVA / MANOVA determining the average values and dispersion indices....

  • EFFECT OF INBREEDING AND SOME OTHER FACTORS ON LACTATION LENGTH IN MALVI COWS. Sharma, Harish; Tomar, S. S.; Kumar, Amit // Indian Journal of Veterinary Sciences & Biotechnology;2015, Vol. 10 Issue 4, p36 

    The data for the present investigation pertained to 1647 observations of lactation length (LL) on Malvi cattle maintained at Govt. Cattle Breeding Farm, Agar, District Shajapur (M.P.), covering a period of 48 years from 1962 to 2009. The least squares analysis of variance revealed the mean...

  • Estimates of Genetic Parameters and Trends of Lactation Performance Traits of Deoni Cattle. Shingare, V. M.; Chauhan, D. S.; Bhise, B. R.; Ghosh, Nilotpal // Theriogenology Insight;Aug2015, Vol. 5 Issue 2, p69 

    Data on 114 Deoni cows maintained at Cattle Cross Breeding Project, Vasantrao Naik Marathwada Agriculture University, Parbhani over a period of 25 years were used for the present investigation. The data were subjected to assess the effect of period of calving, season of calving, lactation order...

  • Efectos de cruzamiento para producción de leche y características de crecimiento en bovinos de doble propósito en el trópico húmedo. Román-Ponce, Sergio Iván; de Jesús Ruiz-López, Felipe; Montaldo, Hugo H.; Rizzi, Rita; Román-Ponce, Heriberto // Revista Mexicana de Ciencias Pecuarias;oct-dic2013, Vol. 4 Issue 4, p405 

    Crossbreeding effects were evaluated in three dual purpose bovine sub-populations in the tropics, and 5,040 lactations, 4,429 birth weights and adjusted weights at 205 [3,878], 365 [3,017] and 540 [2,276] days (PN, P205, P365 y P540, respectively) from Zebu cattle (CE) and its crosses with...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics