Transcriptome analysis to identify differential gene expression affecting meat quality in heavy Italian pigs

Area of Science:

• Animal Genetics
• Molecular Biology
• Genomics

Background:

• Meat quality is a crucial trait in pig breeding.
• Understanding the genetic basis of meat quality is essential for improving pork production.
• Previous studies have identified quantitative trait loci (QTLs) for meat quality traits.

Purpose of the Study:

• To identify differentially expressed genes affecting meat quality in Italian pigs.
• To analyze the muscle transcriptome of Large White and Landrace breeds.
• To associate gene expression with specific meat quality phenotypes.

Main Methods:

• Suppressive subtractive hybridization (SSH) was employed to compare muscle transcriptomes.
• Two subtractive libraries were constructed from longissimus dorsi tissue.
• Differential gene expression was analyzed using association analysis and t-tests.

Main Results:

• Eighty-four differentially expressed sequence tags (ESTs) were identified.
• Sixty-eight ESTs were mapped to the pig genome, with many co-localizing to known meat quality QTLs.
• Twenty-eight out of thirty validated ESTs showed significant differential expression and association with meat quality phenotypes.

Conclusions:

• This study identified novel candidate genes influencing pig meat quality.
• The findings provide a foundation for marker-assisted selection to enhance meat quality traits.
• Gene expression analysis using SSH is effective for discovering genes related to complex traits like meat quality.