Application of Linear Discriminant Model to Evaluate the Association Between Milk Production, Reproductive Performance, and Calving Season in Dairy Cattle | ||||
Benha Veterinary Medical Journal | ||||
Article 27, Volume 39, Issue 2, December 2020, Page 138-141 PDF (170.14 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/bvmj.2020.50592.1300 | ||||
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Authors | ||||
hayaa ahmed abdelrahman 1; Eman ramadan Kamel2; fardos abdelwahab Hassan3 | ||||
1Animal wealth department,faculty of veterinary medicine,Qlioup,Qliopia | ||||
2Animal Wealth Development Department, Faculty of veterinary medicine,Banha university | ||||
3Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University,zagazig,sharkia | ||||
Abstract | ||||
This study was aimed to determine the performance of linear discriminant analysis (LDA) for differentiation between seasons of calving on the basis of305day- milk yield, fat %, protein %, days open (DO), days to first insemination (DFI), and number of services per conception. By considering the assumption of this method, a random sample was selected from the animals being represented by all explanatory variables. The discrimination between seasons of calving was depended on the significance of coefficients, classification rate, in addition to the group centroids. Results showed that LDA method selected 305day-milk yield (kg), days open (DO), days to first insemination and number of services per conception, as the significant (P < 0.05) contributors for data classification. The total variance explained by 2 functions was 79.2% and 15.9%, respectively. So, the 1st function can do well in discrimination process than the 2ndone. The percentage of correct classification was 64.6%. In conclusion, LDA can be used effectively for classification of calving seasons, even with violation of normality assumption. | ||||
Keywords | ||||
Discriminant Analysis; Milk yield; Reproductive measures; Dairy cattle | ||||
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