GENOTYPE X ENVIRONMENTAL INTERACTIONS, FOR IMPORTANT ECONOMIC TRAITS IN SEVEN STRAINCROSSES OF WHITE LEGHORN BIRDS
Loading...
Date
1988
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU, Anand
Abstract
Seven strain crosses of white Leghorn were subjected to comparative evaluation under cage and deep litter housing during the year 1986-87 at the testing centre of A.I.C.R.P. on Poultry, G.A.U., Anand. The phenotypic correlation and regression of annual performance on part year (280 days) performance, in respect of economic traits, were also estimated. The overall averages of egg numbers (H.H. basis) egg numbers (H.D. basis), rate o£ lay (H.H. basis), rate o£ lay (H.D. basis), egg weight, feed consumption per bird per day, feed consvunption per dozen of eggs, feed consumption per kilo of egg mass and performance efficiency index were 100.54 ± 1.09, 102.47 ± 0.95, 71.76 ± 0.78%, 73.19 ± 0.68%. 48.07 ± 0.16 g, 101.426 ± 0.585 g, 1.712 ± 0.022 kg, 2.986 ± 0.042 kg and 28.88 ± 0.36 pexrcent respectively for part period (21-40 week), 115.91 ± 2,00, 126.34 ± 1.75, 59.14 ± 1.02%, 64.46 ± 0.89%. 51.71 ± 0.18 g, 104.135 ± 1.064 g, 2.166 + 0.048 kg, 3.492 ± 0.077 kg and 27.52 ± 0.044 per cent respectively for residual period (41 to 68 week) and 212,32 ± 2.98, 229.43 ± 2.31, 63.19 ± 0.89%, 68.25 ± 0.69%, 49.99 ± 0,15 g, 102.774 ± 0.762 g, 1.986 ± 0.036 kg, 3.316 ± 0.064 kg and 27.59 ± 0.38 per cent respectively for annual (21 to 68 week) period. Analysis of variance revealed that the effects of genetic groups, housing systems and their interactions were important in influencing the performance of the pullets. The phenotypic correlation and regression of annual performance with part year (280 days) performance for various economic traits were positive and significantly higher.
Description
Keywords
A STUDY