V. Loreto

Publications of : V. Loreto

Plant Genetics Research Article

ITS2 as a molecular marker for the identification of Diatraea saccharalis and D. flavipennella and possible infection with Cotesia spp

In Brazil, the species Diatraea flavipennella and D. saccharalis play an important role in the sugar and alcohol agribusiness by causing many damages in sugarcane fields. The egg, larva, pupa, and adult stages are very morphologically similar between these species, and the identification can be confused. The internal transcribed spacer 2 (ITS 2) from ribosomal DNA has important features as evol.. Read More»

Genet. Mol. Res. 16(3): gmr16039732

DOI: 10.4238/gmr16039732

Animal Genetics Short communication

A small B chromosome in the grasshopper Ommexecha virens (Ommexechidae)

T.E. Souza, L.C. Silva-Neto, J.F. Santos, V. Loreto and T.T. Rieger

B chromosomes, also called supernumerary or accessory chromosomes, have been characterized as extra elements found in the karyotypes of different eukaryotic species. B chromosomes are nonvital and only occur in some individuals within a species. Moreover, the chromosomes contain silenced genes, and they exhibit heterochromatinization and the accumulation of repetitive DNA and transposons. In th.. Read More»

Genet. Mol. Res. 14(4): 2015.December.21.22

DOI: 10.4238/2015.December.21.22

Animal Genetics Research Article

B chromosome prevalence and physical mapping of 18S rDNA and H4 histone sites in the grasshopper Xyleus discoideus angulatus (Romaleidae)

C.B. Machado, L.C. Silva Neto, V. Loreto and M.J. Souza

We sampled 11 natural populations of the grasshopper Xyleus discoideus angulatus in Northeastern Brazil to analyze B chromosome frequency and meiotic behavior. We observed a single large B chromosome, resembling the X chromosome, in 29 of the 402 specimens. Eight of the 11 populations had B chromosomes, with a rather broad geographical distribution, suggest.. Read More»

Genet. Mol. Res. 13(3): 2014.March.26.4

DOI: 10.4238/2014.March.26.4

Animal Genetics Research Article

Physical mapping of 18S and 5S rDNA loci and histone H3 gene in grasshopper species of the subfamily Gomphocerinae (Acrididae)

L.C. Silva-Neto, A.C.S. Bernardino, V. Loreto and R.C. Moura

In this study, fluorescence in situ hybridization (FISH) analysis was used to determine and compare the numbers and chromosomal locations of two multigene families (rDNA and histone H3) in four Neotropical species of gomphocerine grasshoppers. FISH using the 18S rDNA probe identified a single site on the S9 chromosome of Amblytropidia sp and Ca.. Read More»

Genet. Mol. Res. 14(4): 2015.November.24.8

DOI: 10.4238/2015.November.24.8