Bookcover of Using Selection Indices to Improve Lactation Curve Parameters in Egypt
Booktitle:

Using Selection Indices to Improve Lactation Curve Parameters in Egypt

Scholars' Press (2016-06-22 )

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ISBN-13:

978-3-659-83987-0

ISBN-10:
3659839876
EAN:
9783659839870
Book language:
English
Blurb/Shorttext:
- The buffalo's number in Egypt is estimated to by 3.9 million. - They are one of the main dairy animals in Egypt; their contribution to the country’s milk production is nearly 45.5 % (FAOSTAT, 2013). - Aims: - Investigating genetic improvement possibilities for TD milk yield traits and their lactation curve parameters. - Determining genetic and phenotypic trends for TD milk, fat and protein yields applying a Random Regression Model. - Generating a S.I. for milk production and persistency using eigenvalue and eigenvector indices derived from Random Regression Model. - Results: - Genetic selection for curve parameters (initial, persistency and maximum milk yield) would improve total milk yield traits especially persistency. - Both of the first and the second eigenvalues explained 96% of the variation in improving milk yield and persistency. - Selection based on the second individual eigenvector index is expected to better improve the persistency. - If the breeding goal is to improve persistency and milk yield, then using the 2nd eigenvector index (I*2) with a relative economic value of 1:25 is recommended.
Publishing house:
Scholars' Press
Website:
http://www.scholars-press.com
By (author) :
Amin Amin
Number of pages:
136
Published on:
2016-06-22
Stock:
Available
Category:
Agriculture, horticulture, forestry, fishery, nutrition
Price:
67.90 €
Keywords:
eigenvalue, milk, lactation curve parameters, fat and protein yield, Test-day model, random regression model, genetic and phenotypic trends, eigenvector selection indices, milk yield, persistency, Egyptian buffalo

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