Inherited Disorders and Disease-Resistance Genomics in Kazakhstan Ruminants: Evidence, Limits and Breeding Priorities

Area of Science:

• Ruminant genomics
• Animal breeding
• Molecular diagnostics

Background:

• Kazakhstan's ruminant genomics research is growing, utilizing diverse molecular techniques.
• Different evidence types vary in their direct applicability to breeding decisions.

Purpose of the Study:

• To review and evaluate molecular evidence for inherited disorders, disease resistance, and reproductive health in Kazakhstan's cattle, sheep, and goats.
• To define "actionable evidence" that directly informs breeding management.

Main Methods:

• Structured narrative review of molecular evidence types.
• Evaluation of evidence relevance for breeding decisions based on validated variants and haplotypes.

Main Results:

• Cattle genomics offers the most actionable evidence, with screened defects (e.g., BLAD, DUMPS) and fertility loci in key animals.
• Sheep genomics shows broader but less actionable evidence (e.g., prion gene, MHC, RoH).
• Goat genomics is primarily population-focused, with limited hereditary disease data.

Conclusions:

• A staged genomic-health framework is proposed to differentiate evidence types.
• Priority actions include carrier screening in cattle, baseline data for small ruminants, and phenotype-driven surveillance.