Morphological structuring using principal component analysis of Rampur-Bushair sheep under transhumance production in western Himalayan region, India
| Autor: | S. Katoch, P. K. Dogra, Y. P. Thakur, Rakesh Thakur, Varun Sankhyan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Multivariate statistics
Veterinary medicine General Veterinary 040301 veterinary sciences 0402 animal and dairy science Regression analysis 04 agricultural and veterinary sciences Biology 040201 dairy & animal science 0403 veterinary science Environmental protection Principal component analysis Animal Science and Zoology Adult sheep |
| Zdroj: | Indian Journal of Animal Research. |
| ISSN: | 0976-0555 0367-6722 |
| DOI: | 10.18805/ijar.b-3296 |
| Popis: | Principal component analysis (PCA) was employed on 12 biometric traits of Rampur-Bushair sheep of Himachal Pradesh. Morphological and biometrical observations were recorded on 162 young and 566 adult animals. Multivariate statistics and principal component analysis revealed that body measurements except for peripheral traits were mostly positively and significantly correlated. The correlation among conformation traits ranged from -0.08 to 0.79 and “0.18 to 0.71 in young and adult sheep respectively. Three and four factors were extracted in young and adult sheep respectively, which accounted for 57% and 61% of variation. The principal component extracted contributed effectively to explain general body conformation. The regression analysis suggested that use of principal component was more appropriate than the use of original correlated variable in estimating body weights. Therefore, factor extracted could be helpful in breeding programme with sufficient reduction in the number of biometric traits to be recorded to explain the body conformation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|