Horizontal starch gel electrophoresis was used to investigate the biochemical genetic structure of Chinese mitten crab Eriocheir sinensis and Hepu mitten crab E.hepuensis. Sixteen putative enzyme-coding loci were exam...Horizontal starch gel electrophoresis was used to investigate the biochemical genetic structure of Chinese mitten crab Eriocheir sinensis and Hepu mitten crab E.hepuensis. Sixteen putative enzyme-coding loci were examined for forty-nine Chinese mitten crabs and thirty-eight Hepu mitten crabs. Nine loci, AAT-1 *, AAT-2 *, G3PDH *, GPI *, IDHP-1 *, IDHP-2 *, MDH-1 *, MDH-2 * and PGM *, are polymorphic in Chinese mitten crab, and seven, AAT-1 *, AAT-2 *, GPI *, IDHP-1 *, MDH-1 *, MDH-2 * and PGM *, are polymorphic in Hepu mitten crab. The proportion of polymorphic loci and the expected heterozygosity are 0.562 5 and 0.080 3 for Chinese mitten crab, and 0.437 5 and 0.075 4 for Hepu mitten crab. The Nei’s genetic distance between two species is 0.002 4.展开更多
Two new species of the genus Cobitis from southern China,C.hereromacula from the Luohe River in Guangdong Province and C.baishagensis from the Nandujiang River in Hainan Province,are described and illustrated here.C.h...Two new species of the genus Cobitis from southern China,C.hereromacula from the Luohe River in Guangdong Province and C.baishagensis from the Nandujiang River in Hainan Province,are described and illustrated here.C.hereromacula can be distinguished from its congeners by possessing the following combination of characteristics;absence of the second and third pigmentary zones of Gambetta;13–16 oval blotches on the dorsum and 10–13 vertical,elongated triangular blotches below the midlateral line with more than 20 vertical dark brown bars between them;6–7 narrow rows of dark spots on the caudal fin;a vertical oval spot smaller than the eye diameter on the upper part of the caudal peduncle;pointed mental lobes of the lower lip pointed with a slightly filiform tip;one slender and long needle-shaped lamina circularis at the base of the first branched ray of the male pectoral fins.C.baishagensis can be distinguished from its congeners by the fourth Gambetta zone being covered by 10–12 transverse elongated blotches;4–5 narrow rows of dark spots on the caudal fin;a vertical blotch smaller than the eye diameter on the upper part of the caudal peduncle;males with a slender and long needle-shaped lamina circularis at the second branched pectoral fin ray in males;large scales with a slightly large focal zone;undeveloped mental lobes with a lower lip that does not end posteriorly in a filiform tip.展开更多
文摘Horizontal starch gel electrophoresis was used to investigate the biochemical genetic structure of Chinese mitten crab Eriocheir sinensis and Hepu mitten crab E.hepuensis. Sixteen putative enzyme-coding loci were examined for forty-nine Chinese mitten crabs and thirty-eight Hepu mitten crabs. Nine loci, AAT-1 *, AAT-2 *, G3PDH *, GPI *, IDHP-1 *, IDHP-2 *, MDH-1 *, MDH-2 * and PGM *, are polymorphic in Chinese mitten crab, and seven, AAT-1 *, AAT-2 *, GPI *, IDHP-1 *, MDH-1 *, MDH-2 * and PGM *, are polymorphic in Hepu mitten crab. The proportion of polymorphic loci and the expected heterozygosity are 0.562 5 and 0.080 3 for Chinese mitten crab, and 0.437 5 and 0.075 4 for Hepu mitten crab. The Nei’s genetic distance between two species is 0.002 4.
基金Supported by the National Natural Science Foundation of China(No.31372166)
文摘Two new species of the genus Cobitis from southern China,C.hereromacula from the Luohe River in Guangdong Province and C.baishagensis from the Nandujiang River in Hainan Province,are described and illustrated here.C.hereromacula can be distinguished from its congeners by possessing the following combination of characteristics;absence of the second and third pigmentary zones of Gambetta;13–16 oval blotches on the dorsum and 10–13 vertical,elongated triangular blotches below the midlateral line with more than 20 vertical dark brown bars between them;6–7 narrow rows of dark spots on the caudal fin;a vertical oval spot smaller than the eye diameter on the upper part of the caudal peduncle;pointed mental lobes of the lower lip pointed with a slightly filiform tip;one slender and long needle-shaped lamina circularis at the base of the first branched ray of the male pectoral fins.C.baishagensis can be distinguished from its congeners by the fourth Gambetta zone being covered by 10–12 transverse elongated blotches;4–5 narrow rows of dark spots on the caudal fin;a vertical blotch smaller than the eye diameter on the upper part of the caudal peduncle;males with a slender and long needle-shaped lamina circularis at the second branched pectoral fin ray in males;large scales with a slightly large focal zone;undeveloped mental lobes with a lower lip that does not end posteriorly in a filiform tip.
