Table 1.

Characteristics of genotyping and sequencing technologies

	Relative cost	Coding variant coverage	Regulatory variant coverage
Original GWA array	+	+	+
Denser GWA arrays	+	++	++
IBC array	−	selected	selected
Metabochip/Immunochip	−	selected	selected
Exome chip	−	++	−
Imputation of untyped variants	−	++	++
Exome sequencing	++	+++	−
Low read depth genome sequencing	++	++	++
High read depth genome sequencing	+++	+++	+++

Symbols indicate lower to higher cost and lower to better coverage: −, +, ++, +++.