Variability of mitochondrial ORFans hints at possible differences in the system of doubly uniparental inheritance of mitochondria among families of freshwater mussels (Bivalvia: Unionida)

Table 4 ORFs dataset description

Family	Number of species	mtDNA type	Number of mtDNAs	Number of ORFs	F-orf	M-orf	H-orf
Iridinidae	2	non-DUI	2	1206	0	0	0
Mulleriidae	5	non-DUI	5	2820	0	0	0
Hyriidae	5	F	2	1063	2	0	0
		M	2	1099	0	2	0
		non-DUI	3	1668	0	0	0
		all	7	3830	2	2	0
Margaritiferidae	7	F	6	3273	6	0	0
		M	3	1657	0	6	0
		H	1	556	0	0	1
		all	10	5486	6	6	1
Unionidae	21	F	17	9698	17	0	0
		M	17	9826	0	18	0
		H	4	2166	0	0	4
		all	38	21,690	17	18	4
		all F	25	12,367	25	0	0
		all M	22	12,582	0	26	0
		all H	5	4389	0	0	5
		all non-DUI	10	5694	0	0	0
Total	40		62	35,032	25	26	5

For each taxonomic group of freshwater mussels, the number of species and mtDNAs considered in this study are given, as well as the number and kind of ORFans (F-, M-, or H-orfs) retrieved from them. mtDNA types: F and M, female- and male-transmitted mtDNAs of dioecious DUI species, respectively; H, mtDNA of stably hermaphroditic species that lost DUI sensu [3]; non-DUI, mtDNA of dioecious and hermaphroditic non-DUI species. mtDNAs of dioecious species carrying an F-orf but for which no evidence of DUI has been produced yet, or of dioecious DUI species that can show occasional hermaphroditism, were considered as F for simplicity

ISSN: 2730-7182