- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Estimation of heritability for some productive traits in Leghorn hens by using REML , ML , MIVQUE and TYPE1 | ||
| journal of kerbala university | ||
| Article 1, Volume 3, Issue 2, 2007, Pages 253-256 PDF (0 K) | ||
| Abstract | ||
| The study was conducted at the poultry farm of Animal Resources Department, College of Agriculture, Baghdad University, Abu-Gharib over period from Janu.2005 to Sep.2005 on White Leghorn (24 sire , 131 dam ,336 progeny ). The aim of the research is to make a comparison between age and weight at sexual maturity as adjustment factors on some traits (egg weight, egg number and egg mass) and the effect of each of them on estimation of heritability by using fourth methods .General Linear Model (GLM) within the SAS program 2001 was used. Component of variance for the random effects in the employed mixed model were estimated by fourth methods REML , ML , MIVQUE , TYPE1 . Heritability estimated for egg weight after adjusting for age at sexual maturity using REML,ML.MIVQUE and TYPE1 were 0.34 , 0.32 . 0.26 .0.32 and for egg number 0.69 , 0.66 , 0.51 , 0.63 and for egg mass 0.44 , 0.42 , 0.34 , 0.42 . , whereas the corresponding estimates of heritability of the same traits after adjusting for weight at sexual maturity were 0.31 , 0.29 , 0.25 , 0.30 and 0.68 , 0.65 , 0.65 , 0.50 , 0.62 and 0.47 , 0.45 , 0.37 , 0.45 respectively . | ||
|
Statistics Article View: 41 PDF Download: 34 |
||