Back to Search
Start Over
Genome-Wide Association Studies in Indian Buffalo Revealed Genomic Regions for Lactation and Fertility
- Source :
- Frontiers in Genetics, Frontiers in Genetics, Vol 12 (2021)
- Publication Year :
- 2021
- Publisher :
- Frontiers Media SA, 2021.
-
Abstract
- Murrah breed of buffalo is an excellent dairy germplasm known for its superior milk quality in terms of milk fat and solids-not-fat (SNF); however, it is often reported that Indian buffaloes had lower lactation and fertility potential compared to the non-native cattle of the country. Recent techniques, particularly the genome-wide association studies (GWAS), to identify genomic variations associated with lactation and fertility traits offer prospects for systematic improvement of buffalo. DNA samples were sequenced using the double-digestion restriction-associated DNA (RAD) tag genotyping-by-sequencing. The bioinformatics pipeline was standardized to call the variants, and single-nucleotide polymorphisms (SNPs) qualifying the stringent quality check measures were retained for GWAS. Over 38,000 SNPs were used to perform GWAS on the first two principal components of test-day records of milk yields, fat percentages, and SNF percentages, separately. GWAS was also performed on 305 days’ milk yield; lactation persistency was estimated through the rate of decline after attaining the peak yield method, along with three other standard methods; and breeding efficiency, post-partum breeding interval, and age at sexual maturity were considered fertility traits. Significant association of SNPs was observed for the first principal component, explaining the maximum proportion of variation in milk yield. Furthermore, some potential genomic regions were identified to have a potential role in regulating milk yield and fertility in Murrah. Identification of such genomic regions shall help in carrying out an early selection of high-yielding persistent Murrah buffaloes and, in the long run, would be helpful in shaping their future genetic improvement programs.
- Subjects :
- Germplasm
media_common.quotation_subject
Genome-wide association study
Single-nucleotide polymorphism
Fertility
QH426-470
Biology
milk yield
buffaloes
Lactation
Genetics
medicine
GWAS
Murrah
Genetics (clinical)
Selection (genetic algorithm)
Original Research
Genetic association
media_common
fertility
business.industry
food and beverages
Breed
Biotechnology
medicine.anatomical_structure
Molecular Medicine
business
lactation persistency
Subjects
Details
- ISSN :
- 16648021
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Frontiers in Genetics
- Accession number :
- edsair.doi.dedup.....8601d92d1693889f5b9d6ac936df8ebb