Genetic variation among different morphotypes of the male freshwater prawn Macrobrachium rosenbergii (De Man)

Banu, Mst. Rubia; Siraj, Siti Shapor; Christianus, Annie; Ikhsan, Natrah Fatin Mohd; Rajaee, Amy Halimah

doi:10.1016/j.aqrep.2015.02.001

Cited by 7 publications

(8 citation statements)

References 37 publications

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“…Recent studies carried out in earthen ponds showed a significant additive genetic component for male morphotypes (Hung & Nguyen ; Banu et al . ). Selection for increased growth over four generations decreased the proportion of SM and increased the proportion of OC males in the selected population relative to control and did not change the frequency of the BC morphotypes in the population (Hung & Nguyen ).…”

Section: The Evolution Of Alternative Mating Tactics In the Genus Macmentioning

confidence: 97%

Male morphotypes and alternative mating tactics in freshwater prawns of the genus Macrobrachium: a review

Karplus

Barki

2018

Reviews in Aquaculture

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The discontinuous variation in male mating behaviour is termed alternative mating tactics. A distinction is commonly made between alternative mating tactics that are fixed for life or flexible with simultaneous or sequential switches between tactics over the sexually mature life. Freshwater species of the genus Macrobrachium demonstrate flexible tactics with sequential (i.e. developmental) switch between tactics. Sexually mature populations of the commercially important giant freshwater prawn M. rosenbergii consist of three morphologically and behaviourally distinct male morphotypes: small males, orange claw and blue claw males, representing (respectively) successive stages in the developmental pathway of sexually mature males. The dominant blue claw males secure mating by guarding receptive soft-shelled females with their long chelipeds while the subordinate SM use an alternative tactic of sneak mating to fertilize females. Current knowledge of the mating behaviour and reproductive success of these male morphotypes, including male competition over females, female mate choice and the involvement of pheromones, is reviewed. So far, the occurrence of distinct sexually mature male morphotypes has been described in 24 species within the genus Macrobrachium. The prevalence of distinct male morphotypes and alternative mating tactics among Macrobrachium species is discussed in view of the phylogeny of the genus, based on molecular markers. The environmental and genetic determination of the male morphotypes is discussed, as well as the evolution of the developmental alternative mating tactics in the genus Macrobrachium. Possible implications for prawns' aquaculture and future research are suggested.

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Section: The Evolution Of Alternative Mating Tactics In the Genus Macmentioning

confidence: 97%

Male morphotypes and alternative mating tactics in freshwater prawns of the genus Macrobrachium: a review

Karplus

Barki

2018

Reviews in Aquaculture

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“…Subordinate males have the potential to progress through caste, becoming larger prawn in the absence of a dominant male, which actively court and protect the females before mating (Barki et al, 1991; Karplus et al, 1991; Ra'anan & Cohen, 1985; Ra'anan & Sagi, 1985). Besides the social behaviour, the morphophysiological variations could be associated with genetic components and environmental conditions (Banu et al, 2015; Dinh & Nguyen, 2014).…”

Section: Introductionmentioning

confidence: 99%

Integrated morphometric and molecular analyses indicate three male morphotypes in the freshwater prawn Macrobrachium olfersii (Decapoda, Palaemonidae) along the Brazilian neotropical region

2022

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Males of Macrobrachium olfersii have a large cheliped (second pereiopod) with individual variations in shape and ornamentation, and they vary in size within and between populations. Some misidentification or doubts about taxonomic validity occur due to this morphological variability throughout their geographic distribution. We carried out a morphometric analysis to detect specific patterns and the potential occurrence of morphotypes in M. olfersii from different populations. Our data set included 52 females and 109 males collected in the Neotropical region, between the north and south limits of Brazilian territory, in coastal rivers from the states of Rio Grande do Norte, Bahia, Espírito Santo, Rio de Janeiro, São Paulo, Paraná and Santa Catarina. Body measurements were size standardized by allometric methods and explored by the principal component analysis (PCA) and non‐hierarchical analysis of K‐means clustering and canonical variate analysis (CVA). Our results suggested three distinct morphological groups (morphotypes) only for males in M. olfersii. Furthermore, the confirmation of monophyly of the different populations of M. olfersii was accomplished by sequences of 16S rDNA. Additional studies about relative growth in other populations and the analysis of the entire ontogenetic development of males in the laboratory will be important to complement the knowledge about morphotypes in this species.

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“…Sexually mature males of GFPs develop through three distinct morphological types, namely blue claw males (BC), orange claw males (OC) and small males (SM), and they exhibit distinct heterogenous individual growth (HIG) (Aziz, Nguyen, Rahi, Hurwood, & Mather, 2017; Banu, Siraj, Christianus, Ikhsan, & Rajaee, 2015) (Figure 1). In addition to these three basic male morphotypes, another male morphotype—old blue claw males (OBC)—exists; OBC appear senescent, have an extremely developed second leg and carapace and have a low economic value (Dinh & Nguyen 2014) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…The ratio of various male morphotypes of GFPs thus determines the economic benefits of farming. At present, although genetic variations among the three basic male morphotypes have been studied (Aziz et al., 2017; Aziz, Rahi, Hurwood, & Mather, 2018; Banu et al., 2015), the molecular mechanisms underlying growth differences among the various morphotypes remain unclear, and few studies have been conducted using OBC.…”

Section: Introductionmentioning

confidence: 99%

Identification of differentially expressed genes and signalling pathways to elucidate molecular mechanisms underlying growth differences among the male morphotypes of Macrobrachium rosenbergii

Tang

Xia²,

Cai³

et al. 2020

Aquac Res

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The giant freshwater prawn (GFP) Macrobrachium rosenbergii is an economically important aquaculture species in China. In culture, it is common for males to show unique morphotypes, which exhibit distinct heterogenous individual growth. Little information is currently available on the molecular mechanisms underlying growth differences among male morphotypes of GFPs. Thus, we herein aimed to identify key genes and signalling pathways to elucidate molecular mechanisms underlying growth differences among the male morphotypes of GFPs. We performed transcriptome analyses using RNA‐Seq to compare the following male morphotypes of GFPs: orange claw males, old blue claw males and small males. In total, 97.44 Gb clean data were obtained, and 1,857,760 unigenes were annotated by alignment with public protein databases. Moreover, we found 2,072 and 22,431 differentially expressed genes (DEGs) from the eyestalk and gonads respectively. Gene ontology analyses revealed that ‘system process’ and ‘multicellular organismal process’ were the most enriched in the eyestalk and gonad tissue samples respectively. Furthermore, Kyoto Encyclopedia of Genes and Genomes pathway analysis indicated that pathways associated with gene regulation may play a key role in GFP growth. To summarize, this study provides a valuable repository of novel transcripts for various male morphotypes of GFPs and gives further insights into the molecular mechanisms underlying growth differences in GFPs, which should promote the breeding of commercially cultivated GFPs.

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Genetic variation among different morphotypes of the male freshwater prawn Macrobrachium rosenbergii (De Man)

Cited by 7 publications

References 37 publications

Male morphotypes and alternative mating tactics in freshwater prawns of the genus Macrobrachium: a review

Male morphotypes and alternative mating tactics in freshwater prawns of the genus Macrobrachium: a review

Integrated morphometric and molecular analyses indicate three male morphotypes in the freshwater prawn Macrobrachium olfersii (Decapoda, Palaemonidae) along the Brazilian neotropical region

Identification of differentially expressed genes and signalling pathways to elucidate molecular mechanisms underlying growth differences among the male morphotypes of Macrobrachium rosenbergii

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