Inbreeding depression and heterosis in various quantitative traits of the guppy, Poecilia reticulata

Nakadate, Masahiro; Shikano, Takahito; Taniguchi, Nobuyuki

doi:10.1016/s0044-8486(02)00432-5

Cited by 48 publications

(46 citation statements)

References 20 publications

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“…Both of the studies on cichlids utilized laboratory strains which were expected to exhibit heterosis upon crossing (Tave et al 1990;Marengoni et al 1998). Likewise, three of the five studies on poeciliids, Poecilia reticulata, were performed on strains with low heterozygosity (Chiyokubo et al 1998;Shikano and Taniguchi 2002a;Nakadate et al 2003). Heterozygosity was increased in the inbred populations following strain crossing, and thus heterosis was the predicted outcome (Shikano and Taniguchi 2002a).…”

Section: Discussionmentioning

confidence: 99%

“…Comparisons where authors noted outbreeding depression had negative effect sizes. Hybrids were compared to each parental population Conserv Genet (2007) 8:397-416 399 Foote et al (1992) M: weight (4); length (4) Salmonidae F1 P: salinity tolerance (4) Gharrett and Smoker (1991) M: weight (2); length (2) Salmonidae F1; F2 Gharrett et al (1999) M: length (2) Salmonidae F1; F2 LH: asymmetry (8) Gjerde et al (2002) M: weight (48) Cyprinidae F1 Granath et al (2004) LH: egg survival (12) Salmonidae F1 Hatfield (1997) M: gill raker number (8) (10); length (10) P: conversion efficiency (8) Miller et al (2004) M: length (8) Salmonidae F1 Nakadate et al (2003) LH: survival (4) Poeciliidae F1 M: length (8); undwarf rate (4) P: salinity (4) and temperature (4) tolerance Nguenga et al (2000) LH: survival (4); growth rate (4); fertilization rate (4); hatching success (4) Clariidae F1…”

Section: Effect Sizementioning

confidence: 99%

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What is the fitness outcome of crossing unrelated fish populations? A meta-analysis and an evaluation of future research directions

2006

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Outbreeding has been shown to decrease fitness in a variety of species, including several species of fish. An understanding of the general outcomes following outbreeding is required in order to understand the consequences of conservation-related actions and hybridization in aquaculture. A meta-analysis was conducted on outbreeding studies in fishes using 670 comparisons between parent populations and their hybrid progeny. Five hundred and seventy-six comparisons involved first generation hybrids (F1), and a much smaller number (94) involved second generation hybrids (F2). The overall response to outbreeding in the F1 and F2 generations was positive and significant (F1: d i+ * = 0.425 ± 0.121; F2: d i+ * = 0.548 ± 0.295, where d i+ * is the effect size of studies within generations); however, responses differed when studies were separated into groups describing the experimental environment, taxon, or trait. Findings may be biased by a few studies of large effect. Genetic distance explained little of the variance in effect sizes across studies. Results of the meta-analysis suggest that there is no reliable predictor for the effects of outbreeding in fishes, although inconsistencies in experimental design were noted across studies. Future research should include comparisons in both parental environments in order to detect the underlying mechanisms of outbreeding depression, and should focus on measurement of equivalent sets of fitness-related traits. Experimental design should permit estimation of genetic distances based on quantitative traits, which may in turn be meaningful predictors of the outcomes of outbreeding depression. Concerted and consistent research in this area will provide information of relevance to conservation, aquaculture and evolutionary studies.

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Section: Discussionmentioning

confidence: 99%

Section: Effect Sizementioning

confidence: 99%

What is the fitness outcome of crossing unrelated fish populations? A meta-analysis and an evaluation of future research directions

2006

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“…In relation to the trait affected by inbreeding, not all characters are affected by inbreeding at the same magnitude (Nakadate et al, 2003). Inbreeding depression seems to affect individual or population performance in a complex manner.…”

Section: Discussionmentioning

confidence: 99%

THE EFFECT OF INBREEDING ON THE EARLY PERFORMANCE OF FRESHWATER PRAWN, Macrobrachium rosenbergii

Imron¹

2009

Indonesian Aquaculture Journal

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Inbreeding depression has often been considered to be r esponsible for the deterioration of performance in aquaculture species. Despite a crucial impact that may result from inbreeding depression, comprehensive information reviewing this subject is limited. This study was aimed to gain information on the effect of inbreeding on the early performance of freshwater prawn. The study was performed by comparing performance of inbred and outbred populations. Inbred population was established by brother-sister mating (inbreeding rate of 25%) while the outbred population was formed by mating unrelated individuals. Several fitness and productivity related traits including survival, the rate of larval development, stage dispersion and growth of larvae were evaluated. Results suggest that inbred families performed poorer than that of the outbred in survival. However, inbreeding depression did not seem to occur in other traits including the rate of larval development, larval stage dispersion and growth. This study implies that to maintain genetic quality of farmed prawn stocks, inbreeding rate in farmed population must be controlled not to exceed that level. Implications that these findings may have on aquaculture practices and possible alternatives for the solutions are discussed.

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“…The first group, called inbred population, was population of progenies produced by mating of individual broodstocks derived from the same parental pair (full sib mating). Given this relationship, inbreeding level in the first group would be at least 25% (Frankham et al, 2002;Nakadate et al, 2003).…”

Section: Animal Test and Their Pedigreebased Inbreeding Levelsmentioning

confidence: 99%

THE APPLICATION OF RAPD FINGERPRINTING TO ASSESS INBREEDING LEVELS IN THE CULTURED POPULATIONS OF GIANT FRESHWATER PRAWN, Macrobrachium rosenbergii

Imron¹,

Sunandar²,

Suprapto³

et al. 2010

Indonesian Aquaculture Journal

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Inbreeding has been one of central issues with regard to genetic quality of aquaculture species, including giant fresh water prawn (GFP). Conventional methods for the estimation of inbreeding level are available, such as pedigree analyses which requires a good pedigree record which, unfortunately, is rarely available. Likewise, microsatellite molecular markers commonly applied to obtain the coefficient inbreeding estimates are both laborious and expensive. Hence, an alternative method of inbreeding assessment which is relatively easy but reliable is in need. This study was aimed to explore the applicability of RAPD fingerprinting, which is known to be simple and affordable, to estimate inbreeding level of GFP population. Three GFP populations namely inbred, outbred, and farm populations with inbreeding level of 25%, 0%, and unknown, respectively, were genotyped using five polymorphic RAPD primers. The inbreeding levels mentioned within the first two populations were determined using pedigree analysis. RAPD banding patterns were then used to calculate band sharing index (BSI) and inbreeding coefficient (F). Assessment of the applicability of inbreeding level estimates obtained by RAPD markers was performed by comparing them to those estimated by pedigree analysis. Results show that RAPD fingerprinting was capable of delineating populations differing in their inbreeding coefficients. The pattern resulted from molecular inbreeding coefficient within the inbred and outbred groups, was congruent with that shown by pedigree analysis, while the farm population showed closeness to the inbred group. While the accuracy of the estimate needs to be verified further, this study suggests that RAPD fingerprinting is applicable to estimate population inbreeding level, particularly due to its technical simplicity and cost affordability.

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Inbreeding depression and heterosis in various quantitative traits of the guppy, Poecilia reticulata

Cited by 48 publications

References 20 publications

What is the fitness outcome of crossing unrelated fish populations? A meta-analysis and an evaluation of future research directions

What is the fitness outcome of crossing unrelated fish populations? A meta-analysis and an evaluation of future research directions

THE EFFECT OF INBREEDING ON THE EARLY PERFORMANCE OF FRESHWATER PRAWN, Macrobrachium rosenbergii

THE APPLICATION OF RAPD FINGERPRINTING TO ASSESS INBREEDING LEVELS IN THE CULTURED POPULATIONS OF GIANT FRESHWATER PRAWN, Macrobrachium rosenbergii

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