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Objectives of the study: Selecting and improving the egg yield of the D629 rooster line; selecting and improving the egg weight of the D523 hen line; evaluating the production ability of commercial crossbred chickens created between D629 rooster line and D523 hen line. | MINISTRY OF EDUCATION AND MINISTRY OF AGRICULTURE AND TRAINING RURAL DEVELOPMENT NATIONAL INSTITUTE OF ANIMAL SCIENCE PHAM THUY LINH SELECTION AND PURE BREEDING OF TWO EGG-ORIENTED D629 AND D523 CHICKEN LINES Major Animal Genetics and Breeding Code number 9 62 01 08 BRIEF INFORMATION OF PhD THESIS Ha Noi-2021 The work was completed at National institute of animal science Supervisors Doctor. Nguyen Quy Khiem Assoc Prof. Doctor. Nguyen Huy Dat Reviewer 1 Prof. Doctor. Nguyen Duy Hoan Reviewer 2 Assoc Prof. Doctor. Do Vo Anh Khoa Reviewer 3 Doctor. Ngo Thi Kim Cuc The dissertation will be defended at the National thesis council at National institute of animal sciences Time h date . Month year of 20. The dissertation can be found at - National library - Library of NIAS INTRODUCTION 1. Problem Statement In order to achieve the strategic goals of livestock development and adaptive production system. In the past our country has had access to high-yielding poultry genetic resources in the world conducted selection and breeding and developed some exotic chicken breeds. At the same time some high-productivity chicken lines with oriented-eggs has been selection and breeding. Imported chicken breeds which have high egg production have been developed such as Leghorn white ISA brown Brown nick Goldline 54 Moravia Hisex whiter Hyline etc. From exotic genetic resources some authors have selected crossbreeding using the method of selection based on phenotypic value to create lines for domestic production such as research Nguyen Huy Dat 1991 white Leghorn chickens Phung Duc Tien et al. 2012 two chicken lines HA1 and HA2 Nguyen Quy Khiem et cs. 2016 four lines of GT chickens In 2016 The framework of the bilateral cooperation program between Vietnam and the Czech Republic to development of Czech egg-oriented chickens in Vietnam have been selected and imported two lines of egg-oriented chickens the white feathered D629 line and brown feathered D523 series from DOMINANT CZ. These are .
