Detection of quantitative trait loci affecting haematological traits in swine via genome scanning.

Abstract:

BACKGROUND:Haematological traits, which consist of mainly three components: leukocyte traits, erythrocyte traits and platelet traits, play extremely important role in animal immune function and disease resistance. But knowledge of the genetic background controlling variability of these traits is very limited, especially in swine. RESULTS:In the present study, 18 haematological traits (7 leukocyte traits, 7 erythrocyte traits and 4 platelet traits) were measured in a pig resource population consisting of 368 purebred piglets of three breeds (Landrace, Large White and Songliao Black Pig), after inoculation with the swine fever vaccine when the pigs were 21 days old. A whole-genome scan of QTL for these traits was performed using 206 microsatellite markers covering all 18 autosomes and the X chromosome. Using variance component analysis based on a linear mixed model and the false discovery rate (FDR) test, 35 QTL with FDR < 0.10 were identified: 3 for the leukocyte traits, 28 for the erythrocyte traits, and 4 for the platelet traits. Of the 35 QTL, 25 were significant at FDR < 0.05 level, including 9 significant at FDR < 0.01 level. CONCLUSIONS:Very few QTL were previously identified for hematological traits of pigs and never in purebred populations. Most of the QTL detected here, in particular the QTL for the platelet traits, have not been reported before. Our results lay important foundation for identifying the causal genes underlying the hematological trait variations in pigs.

journal_name

BMC Genet

journal_title

BMC genetics

authors

Gong YF,Lu X,Wang ZP,Hu F,Luo YR,Cai SQ,Qi CM,Li S,Niu XY,Qiu XT,Zeng J,Zhang Q

doi

10.1186/1471-2156-11-56

subject

Has Abstract

pub_date

2010-06-28 00:00:00

pages

56

issn

1471-2156

pii

1471-2156-11-56

journal_volume

11

pub_type

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