Eye colour as a genetic marker for fertility and fecundity of Triatoma infestans (Klug, 1834) Hemiptera, Reduviidae, Triatominae

Pires, Herton Helder Rocha; Abrão, Daniele Oliveira; Machado, Evandro Marques de Menezes; Schofield, Christopher J.; Diotaiuti, Liléia

doi:10.1590/s0074-02762002000500016

Cited by 14 publications

(7 citation statements)

References 6 publications

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“…In summary, these findings further support the similarities between black-and red-eyed specimens of T. infestans already demonstrated for other characteristics (Gonçalves et al, 1997;Pires et al, 2002).…”

Section: Discussionsupporting

confidence: 90%

“…No significant differences in oviposition or egg hatching rates have been associated with the parental eye-color phenotypes in this species (Pires et al, 2002). Although no impairment of mating attractiveness or mating success has been related to the red-eyed color, it has been suggested that sperm cells from red-eyed males have a lower viability compared to those of black-eyed specimens, thus explaining why red-eyed mutants of T. infestans are uncommon in natural populations (Pires et al, 2002).…”

Section: Introductionmentioning

confidence: 89%

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Eye pigments of the blood-sucking insect, Triatoma infestans klug (Hemiptera, Reduviidae)

Moraes

Pimentel

Rodrigues³

et al. 2005

Braz. J. Biol.

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The pigmentation of black (wild) and red (mutant) eyes of Triatoma infestans was studied spectrophotometrically and compared with red-eyed (wild) and white-eyed (mutant) forms of Drosophila melanogaster. The spectral absorption profiles of the black and red eye pigments of T. infestans were similar to each other and to that of the wild-type eyes of D. melanogaster. The similarity to the wild form of D. melanogaster indicated that both eye forms of T. infestans contained ommochromes of the xanthommatin type, a finding confirmed by ascending paper chromatography. Pteridines, melanins, and ommins were not detected as eye pigments in T. infestans. The eye color difference in T. infestans was assumed to be a function of the xanthommatin concentration, with a smaller content of ommochrome in red eyes, although this probably did not affect the insect's visual acuity. These data support other findings regarding the similarities between black-and red-eyed specimens of T. infestans for other characteristics.Key words: Triatoma infestans, eye color, black eyes, red-eyed mutant, ommochrome, spectral absorption profiles. RESUMO Pigmentos de olho em Triatoma infestans (Hemiptera, Reduviidae)A pigmentação de olhos pretos (forma selvagem) e vermelhos (forma mutante) de Triatoma infestans foi estudada por espectrofotometria e comparada à de olhos vermelhos (selvagem) e brancos (mutante) de Drosophila melanogaster. Os perfis do espectro de absorção dos pigmentos de olho preto e vermelho de T. infestans foram semelhantes entre si e ao dos olhos de tipo selvagem de D. melanogaster. A similaridade com a forma selvagem de D. melanogaster indicou que ambos os tipos de olho de T. infestans continham omocromos do tipo xantomatina, o que foi confirmado por cromatografia ascendente em papel. Não foram detectadas pteridinas, melaninas e ominas como pigmentos de olho em T. infestans. A diferença na cor de olho em T. infestans foi considerada uma função da concentração de xantomatina, sendo menor o conteúdo de omocromo nos olhos vermelhos, embora isso provavelmente não afete a acuidade visual do inseto. Esses resultados estão de acordo com dados de outros autores quanto a semelhanças envolvendo outras características entre espécimes de olho preto e vermelho de T. infestans.Palavras-chave: Triatoma infestans, cor de olho, olhos pretos, mutante de olho vermelho, omocromo, espectro de absorção. Braz. J. Biol., 65(3): 477-481, 2005 478 MORAES, A. S. et al.

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 89%

Eye pigments of the blood-sucking insect, Triatoma infestans klug (Hemiptera, Reduviidae)

Moraes

Pimentel

Rodrigues³

et al. 2005

Braz. J. Biol.

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“…Except the wild‐type brown eye, red‐eye color mutation phenotype can also be observed (Seo et al ., ; Liu et al ., ). Moreover, red eye mutation phenotype is also present in other Hemipterans, such as Sogatella furcifera , Laodelphax striatellus (Wang et al ., ) and several bugs (Shimizu & Kawasaki, ; Pires et al ., ; Snodgrass, ; Moraes et al ., ; Allen, ; Hull et al ., ). However, the mutation mechanisms of these insects are still unknown, limited by the lack of clarity regarding the eye pigment synthesis pathway.…”

Section: Discussionmentioning

confidence: 99%

karmoisin and cardinal ortholog genes participate in the ommochrome synthesis of Nilaparvata lugens (Hemiptera: Delphacidae)

et al. 2017

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Ommochrome is the major source for eye coloration of all insect species so far examined. Phenoxazinone synthetase (PHS) has always been regarded as the terminal step enzyme for ommochrome formation, which is encoded by cardinal or karmoisin genes. Our previous study indicated that the karmoisin ortholog gene (Nl-karmoisin) product in the brown planthopper (BPH) was a monocarboxylate transporter, while not a PHS. Here, based on full-length complementary DNA, the cardinal ortholog gene in BPH (Nl-cardinal) product was predicted to be a haem peroxidase rather than a PHS. We suggest for the first time that neither karmoisin nor cardinal encodes the PHS, but whether PHS participates in BPH eye pigmentation needs further research. Nymphal RNA interference (RNAi) experiments showed that knockdown Nl-cardinal transcript led the BPH ocelli and compound eye to color change from brown to red, while knockdown Nl-karmoisin only made the ocelli present the red phenotype. Notably, not only the Nl-cardinal transcript, dscd injection (Nl-cardinal targeting double-stranded DNA (dsRNA)) also significantly reduced the Nl-karmoisin transcript by 33.7%, while dska (Nl-karmoisin targeting dsRNA) injection did not significantly change the Nl-cardinal transcript. Considering the above RNAi and quantitative real-time polymerase chain reaction results, we propose that Nl-cardinal plays a more important role in ommochrome synthesis than Nl-karmoisin, and it may be an upstream gene of Nl-karmoisin. The present study suggested that both karmoisin and cardinal ortholog genes play a role in ommochrome synthesis in a hemimetabolous insect.

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“…Looking for differences in reproductive success of males in polyandric triatomines like T. infestans or R. prolixus using genetic markers may help to determine if sperm competition or other mechanism enhancing reproductive success is present in these insects. Pires et al (2002) utilised a recessive character for red eye colour in T. infestans to analyse the fertility and fecundity of these insects. When a first copulating male is recessive, i.e., it has red eyes, and a second copula happens with a wild type male, these authors observed that the sperm that fertilises the eggs is gradually substituted, as the number of offsprings from the red eye male gradually declines.…”

Section: Discussionmentioning

confidence: 99%

The sexual behaviour of Panstrongylus megistus (Hemiptera: Reduviidae): an experimental study

Pires

Lorenzo

Lazzari

et al. 2004

Mem. Inst. Oswaldo Cruz

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Eye colour as a genetic marker for fertility and fecundity of Triatoma infestans (Klug, 1834) Hemiptera, Reduviidae, Triatominae

Cited by 14 publications

References 6 publications

Eye pigments of the blood-sucking insect, Triatoma infestans klug (Hemiptera, Reduviidae)

Eye pigments of the blood-sucking insect, Triatoma infestans klug (Hemiptera, Reduviidae)

karmoisin and cardinal ortholog genes participate in the ommochrome synthesis of Nilaparvata lugens (Hemiptera: Delphacidae)

The sexual behaviour of Panstrongylus megistus (Hemiptera: Reduviidae): an experimental study

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