Table 1.

Classification, Description, and Number of Genes and GFs in Ostreococcus tauri RCC4221 (MT−) and RCC1115 (MT+) Strains

GF Class	Features of Included Genes	RCC4221 (MT−)	RCC1115 (MT+)
MT-specific GFs	Present in either all Ostreococcus MT− or all Ostreococcus MT+	6 genes in 6 GFs	2 genes in 2 GFs
Core MT GFs	Present in all Mamiellales genomes and located only in MT region	23 genes in 23 GFs	23 genes in 23 GFs
Shared MT GFs (noncore)	Present in both Ostreococcus MT loci, but not in all Mamiellales MT regions	75 genes in 69 GFs	79 genes in 69 GFs
GFs extending outside MT	Present in one Ostreococcus MT locus but with homologous genes in other regions in the opposite strain	28 genes in 27 GFs	8 genes in 4 GFs
GFs not retained for analysis	Present in only one Ostreococcus MT locus and Mamiellales genomes but absent from the genomes of the opposite strains/MT; divergent GFs or singletons	112 genes	128 genes
Total number of genes		244	240