利用关联组估计中国大白、长白及杜洛克猪繁殖性状的遗传参数

doi:10.11843/j.issn.0366-6964.2016.03.003

Abstract

Abstract:

The objective of this study was to estimate genetic parameters for total number born(TNB) of Yorkshire，Landrace and Duroc pigs in different genetic evaluation groups，which could establish foundation for the national swine joint genetic evaluation.Estimation of the degree of connectedness among 74 national nucleus farms were calculated by the module DMU4 in DMU software，based on the principle of each herd in group with a minimum average connectedness rating of 3% and all herds in group connected with each other，3 groups for each breed were screened(i.e.group1，group2 and group3).Animal model and DMU software were used to estimate variances of animal genetic and permanent environmental for total number born(TNB) of Yorkshire，Landrace and Duroc pigs in 3 groups，fixed effects of contemporary groups were also included in the analysis，records on 61 161，19 974 and 18 002 for Yorkshire，28 239，11 918 and 3 064 for Landrace，and 7 174，6 512 and 2 417 for Duroc in the group1，2 and 3，respectively，were analyzed.As a result，in general，the degree of connectedness was low(the average connectedness rating was 0.20%) and large-scale across-herd genetic evaluation in China was not practicable at present，but it might carry out across-herd genetic evaluation in certain regions.Estimated values of permanent environmental effects ranged from 0.05 to 0.11，estimated values of heritabilities for TNB were approximately 0.10 for all breeds and groups，the results were within the range recommended by relevant literature.The results indicate that genetic parameters of group 1 were better than other groups，therefore，it would expect to be used in the national swine joint genetic evaluation in the future.

CLC Number:

S828
S813.3

ZHANG Suo-yu，QIU Xiao-tian，DING Xiang-dong，ZHANG Qin，WANG Zhi-gang，WANG Chang-cun，QU Yun-long . Estimation of Genetic Parameters by Connecting Groups for Reproductive Traits of Yorkshire，Landrace and Duroc Pigs in China[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2016, 47(3): 429-438.

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Estimation of Genetic Parameters by Connecting Groups for Reproductive Traits of Yorkshire，Landrace and Duroc Pigs in China

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