Evolutionary and population genetics of Siluroidei

Volckaert, Filip; Agnèse, Jean‐François

doi:10.1051/alr:1996043

Cited by 6 publications

(5 citation statements)

References 34 publications

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“…The range of alleles observed per locus, four to eight was similar to the three to eight range observed by Volckaert and Agnese (1996) in the analysis of five microsatellite loci in ten samples of C. gariepinus. However, Galbusera et al (1996) observed a range of five to 14 numbers of alleles in the characterization of seven microsatellite loci in C. gariepinus.…”

Section: Allelic Variationsupporting

confidence: 79%

Preliminary characterization of genetic strains in clariid species, Clarias gariepinus and Heterobranchus bidorsalis using microsatellite markers

Agbebi¹,

Ilaboya²,

Adebambo³

2013

Afr. J. Biotechnol.

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Two Clariid species, Clarias gariepinus and Heterobranchus bidorsalis were compared at four loci using C. gariepinus microsatellite markers (Cga01, Cga02, Cga03, and Cga05). The heterozygosities observed were found to be 0.450 ± 0.050 and 0.442 ± 0.127, while 100% polymorphism was observed in both species. Overall, 95% of the samples amplified upon polymerase chain reaction (PCR) amplification and 44.3% of the total alleles observed for all the loci were heterozygote. Conformity to Hardy-Weinberg equilibrium using the Chi-Square test showed that 81.25% of locus-population relationship conformed to Hardy-Weinberg equilibrium. The neighbor-joining phylogenetic dendrogram obtained gave a bootstrap value of 72, indicating that the genetic distance between the two species is distinct.

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Section: Allelic Variationsupporting

confidence: 79%

Preliminary characterization of genetic strains in clariid species, Clarias gariepinus and Heterobranchus bidorsalis using microsatellite markers

Agbebi¹,

Ilaboya²,

Adebambo³

2013

Afr. J. Biotechnol.

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“…The seven loci assayed were polymorphic for all the populations, with each having at least four allele per population. The range of alleles observed per locus, three to eight was in perfect agreement with the three to eight range observed by [18] in the analysis of five microsatellite loci in ten samples of Clariasgariepinus. However, [19] observed a range of five to 14 alleles in the characterization of seven microsatellite loci in Clariasgariepinus.…”

Section: Discussionsupporting

confidence: 85%

Genetic Differentiation of Clariid Populations using Microsatellite Markers in Kano State Rivers

Idris

Okeke

Madu

et al. 2021

AJBGMB

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This study aimed to investigate the genetic characterization of strains of Clariid fish species in some river bodies in Kano State using microsatellite markers.One hundred and seventy seven Clariid fish samples (Clariasgariepinus and Heterobranchuslongifilis) were collected from six rivers (Thomas, Ghari, Tiga dam, Duddurun Gaya, Karaye and Bagwai) in Kano state. Blood sample was taken from each fish sample by severing the caudal peduncle and drained into FTA cards for DNA extraction, Polymerase Chain Reaction and electrophoresis to determine genetic variation between the Clariid fish populations.Genealex 6.4 software package was used to analyse the resolve bands from DNA extraction to determine their base pair and genetic variation. Results showed that the Fst values ranged from 0.00 to 0.66, Fit ranged from -0.04 to 0.12, Fis ranged from -0.35 to -0.26. It indicated a large number of gene flow (exchange) among the populations with a range of 0.46 to 0.87. There was an established magnitude of genetic divergence (91.86%) among the populations as shown by the result of the percentage polymorphism which depends on the number of alleles detected per locus and their frequencies. It can be concluded that since there was no inbreeding as shown in the study, none of the population exhibited genetic uniqueness. The populations had a high genetic differentiation between populations but moderate differentiation within populations. The populations were outbred populations; an indication that relatives avoided mating in the population.

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“…These species have a male heterogametic (XY) system and a female heterogametic (ZW) system on different linkage groups ( Ser et al, 2010 ; Cnaani, 2013 ; Moore and Roberts, 2013 ; Conte et al, 2017 ; Gammerdinger and Kocher, 2018 ). The majority of the sex chromosome systems in clariid catfish show the ancestral karyotype with ZZ/ZW system ( Agnèse et al, 1990 ; Volckaert and Agnèse, 1996 ). This suggests that the ZW group with differentiated sex chromosomes of C. gariepinus might be distributed in West Africa, whereas the turnover of sex chromosome systems might have occurred in ancestral homomorphic ZW sex chromosomes, resulting in the XY group.…”

Section: Discussionmentioning

confidence: 99%

An Investigation of ZZ/ZW and XX/XY Sex Determination Systems in North African Catfish (Clarias gariepinus, Burchell, 1822)

et al. 2021

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An investigation of sex-specific loci may provide important insights into fish sex determination strategies. This may be useful for biotechnological purposes, for example, to produce all-male or all-female fish for commercial breeding. The North African catfish species, Clarias gariepinus, has been widely adopted for aquaculture because its superior growth and disease resistance render the species suitable for hybridization with other catfish to improve the productivity and quality of fish meat. This species has either a ZZ/ZW or XX/XY sex determination system. Here, we investigate and characterize these systems using high-throughput genome complexity reduction sequencing as Diversity Arrays Technology. This approach was effective in identifying moderately sex-linked loci with both single-nucleotide polymorphisms (SNPs) and restriction fragment presence/absence (PA) markers in 30 perfectly sexed individuals of C. gariepinus. However, SNPs based markers were not found in this study. In total, 41 loci met the criteria for being moderately male-linked (with male vs. female ratios 80:20 and 70:30), while 25 loci were found to be moderately linked to female sex. No strictly male- or female-linked loci were detected. Seven moderately male-linked loci were partially homologous to some classes of transposable elements and three moderately male-linked loci were partially homologous to functional genes. Our data showed that the male heterogametic XX/XY sex determination system should co-exist with the ZZ/ZW system in C. gariepinus. Our finding of the co-existence of XX/XY and ZZ/ZW systems can be applied to benefit commercial breeding of this species in Thailand. This approach using moderately sex-linked loci provides a solid baseline for revealing sex determination mechanisms and identify potential sex determination regions in catfish, allowing further investigation of genetic improvements in breeding programs.

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Evolutionary and population genetics of Siluroidei

Cited by 6 publications

References 34 publications

Preliminary characterization of genetic strains in clariid species, Clarias gariepinus and Heterobranchus bidorsalis using microsatellite markers

Preliminary characterization of genetic strains in clariid species, Clarias gariepinus and Heterobranchus bidorsalis using microsatellite markers

Genetic Differentiation of Clariid Populations using Microsatellite Markers in Kano State Rivers

An Investigation of ZZ/ZW and XX/XY Sex Determination Systems in North African Catfish (Clarias gariepinus, Burchell, 1822)

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