Family | mtDNA | Number of cox2 analyzed | Length (bp) |
---|
transmitted by | total number | minimum | maximum | mean | SD |
---|
Iridinidae | eggs | 2 | 2 | 681 | 681 | 681.0 | 0.0 |
Mulleriidae | eggs | 5 | 4 | 681 | 681 | 681.0 | 0.0 |
Hyriidae | eggs | 5 | 5 | 681 | 693 | 683.4 | 4.8 |
sperm | 2 | 2 | 1329 | 1380 | 1354.5 | 25.5 |
Margaritiferidae | eggs | 7 | 7 | 600 | 693 | 672.4 | 29.9 |
sperm | 3 | 3 | 1215 | 1224 | 1218.0 | 4.2 |
Unionidae | eggs | 21 | 21 | 681 | 684 | 681.1 | 0.6 |
sperm | 17 | 17 | 825 | 1272 | 1193.2 | 130.8 |
- Range, mean, and standard deviation (SD) of the cox2 gene length in egg- and sperm-transmitted mtDNAs in different freshwater mussel families. Sperm-transmitted mtDNAs are present only in families showing DUI. Uniparental transmission of mtDNA through female gametes is assumed in Iridinidae and Mulleriidae, which do not show DUI. In Mulleriidae, the partially sequenced cox2 gene from Anodontites trapesialis was excluded from this analysis; however, it does not show the typical 3′ elongation of M cox2 genes [5]