GENETIC PARAMETERS STUDIED IN LEGHORN LINE 004C

CRISTINA LAZĂR, RODICA PELMUS, ELENA GHIłĂ

Abstract


The purpose of the study was to determine the genetic parameters because they vary from one line to another and from one generation to the next, to enable us observe the genetic basis of selection in the surveyed line. The following genetic parameters were studied: heritability (0.0147 for the age at the first egg), egg production (h2 = 0.067); egg weight at 26 de weeks (h2 = 0.17and at 34 weeks (h2 = 0.137. The estimated value for the body weigh heritability was 0.302; the production index had a heritability of 0.128. The genetic correlations of the surveyed traits ranged between -0.5116 for the trait pair egg production and body weight at 34 weeks; 0.8992 for the trait pair egg weight at 26 weeks and at 34 weeks. The phenotypic correlations ranged between -0.3451 and 0.7272 for the trait pairs: body weight and production indicator; egg production and production indicator. The environmental correlations had a minimum value of -0.3121 for the trait pair body weight and production indicator; the maximal value was observed for the trait pair egg production and production indicator. The knowledge of the phenotypic, genetic and environmental correlations of the economically-important traits was required by the establishment of a correct selection basis for the simultaneous improvement for two or more traits. The surveyed parameters outline quantitatively and qualitatively the improvement of line 004C used for the production of Albo SL 2000 hybrid.


Keywords


genetic parameters; heritability; genetic correlations; age at first egg; egg production; egg weight; body weight

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LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

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