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Mapping of QTL on chromosome X for fat deposition, muscling and growth traits in a wild boar × Meishan F 2 family using a high‐density gene map
Author(s) -
Čepica S.,
Bartenschlager H.,
Geldermann H.
Publication year - 2007
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/j.1365-2052.2007.01661.x
Subject(s) - quantitative trait locus , biology , genetic linkage , genetics , gene
Summary Quantitative trait loci (QTL) for fat deposition, growth and muscling traits have been previously mapped on the basis of low‐density linkage maps in a wild boar × Meishan F 2 family to the chromosome X region flanked by SW2456 and SW1943 . Improved QTL resolution was possible using data for F 2 animals with a marker density of 2.7 cM distance in the SW2456 to SW1943 region, including AR , SERPINA7 and ACSL4 as candidate genes. The resolution of the QTL scan was increased substantially, as evidenced by the higher F ‐ratio values for all QTL. Maxima of F ‐ratio values for fat deposition, muscling and growth traits were 28.6, 18.2 and 16.5 respectively, and those QTL positions accounted for 7.9%, 5.0% and 4.5% of the F 2 phenotypic variance (VF 2 ) respectively. QTL for fatness and growth and for most muscling traits mapped near ACSL4 , with the exception of the QTL for ham traits that mapped proximally, in the vicinity of AR . An analysis performed separately for F 2 male animals showed the predominant QTL affecting fat deposition traits (up to 13.6% VF 2 ) near AR and two QTL for muscling traits (up to 9.9% VF 2 ) mapped close to ACSL4 . In the F 2 female animals, QTL affecting muscling (up to 12.1% VF 2 ) mapped at ACSL4 and SW2456 , and QTL for fat deposition (10% VF 2 ) and growth (up to 10.5% VF 2 ) mapped at ACSL4 .