Consulta: subjectFacets:"Dwarfism"
Registros recuperados: 5
Data/hora: 13/06/2024 07:46:05

Late Cretaceous dwarf decapods from Guerrero, southern Mexico and their migration patterns
Provedor de dados: 16
Autores: Fraaije, R.H.B.; Vega, F.J.; Bakel, B.W.M. van; Garibay-Romero, L.M.
Two new brachyuran species are described for the Upper Cretaceous Mexcala Formation, Guerrero State, Mexico. Longusorbis quadratus new species (Coniacian, Temalac region) is the oldest and southernmost record for the genus. Xanthosia zoquiapensis new species (Campanian, Zoquiapa region) is the first record for the genus in Mexico. In addition, the age for Costacopluma bishopi Vega and Feldmann is discussed (Coniacian, Temalac region) and represents the oldest and southernmost record for Cretaceous representatives of this genus in North America. All specimens are considerably smaller compared to other species of the same genera and are interpreted as the first example of brachyuran dwarfism in the geological record. These species add new insight into...
Tipo: Article / Letter to the editor
Palavras-chave: Dwarfism; Decapoda; Cretaceous; New species; Mexico; 38.22; 42.74.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/214533

Atypical, ventro-ventral copulation position in aphids of the genus Stomaphis Walker, 1870 (Insecta, Hemiptera)
Provedor de dados: 16
Autores: Depa, L.; Kanturski, M.; Taszakowski, A.; Wieczorek, K.
Firm matching of genitals during copulation is of critical importance to effective insemination and thus, gene flow. During the evolution of insects, an effective position during copulation promoted higher fecundity through control over the act of mating or elimination of competitors. Usually during insect copulation, either twisting or flexing of the male abdomen occurs, and genitals remain symmetrically or asymmetrically disposed following changes in the mating position. However, it is always the dorsal side of the male genitalia that makes contact with the ventral side of female abdomen. Here we present the unusual case of a ‘belly-to-belly’ copulation, with symmetrically positioned male genitals and no twisting of the abdomen. During the mating of two...
Tipo: Article / Letter to the editor
Palavras-chave: Aphididae; Dwarfism; Mate guarding; Sexual competition; Speciation; 42.75.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/480053

Clinical and molecuar characterization of Brazilian patients with growth hormone gene deletions
Provedor de dados: 56
Autores: Arnhold,I.J.P.; Osorio,M.G.F.; Oliveira,S.B.; Estefan,V.; Kamijo,T.; Krishnamani,M.R.S.; Cogan,J.D.; Phillips III,J.A.; Mendonça,B.B.
Genomic DNA from 23 patients with isolated growth hormone (GH) deficiency (12 males and 11 females: heights -4.9 ± 1.4 SDS) was screened for GH gene deletions by restriction endonuclease analysis of polymerase chain reaction amplification products. Three unrelated patients had typical features of severe GH deficiency and deletions (6.7 kb in two and 7.6 kb in one) of the GH gene. The two patients with 6.7-kb deletions developed growth-attenuating anti-GH antibodies whereas the patient with the 7.6-kb deletion continued to grow with GH replacement therapy. Our finding that 3/23 (~13%) Brazilian subjects had GH gene deletions agrees with previous studies of severe isolated GH deficiency subjects in other populations. Two of three subjects (67%) with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Growth hormone; Dwarfism; Gene.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400003

Agronomic potential of BC1F2 dwarf round tomato populations
Provedor de dados: 64
Autores: Finzi,Rafael Resende; Maciel,Gabriel Mascarenhas; Peres,Hugo Gabriel; Silva,Marina Freitas e; Peixoto,Joicy Vitória Miranda; Gomes,Danilo Araújo.
ABSTRACT The use of dwarf lines to obtain mini-tomato hybrids has provided agronomic and economic benefits. In Brazil, round tomatoes predominate over other varieties. The benefits of using a dwarf parent in round tomato hybrids has yet to be explored, making it important to develop dwarf round tomato lines. Backcrossing is the most suitable method to develop these lines. Evaluation and selection of the dwarf populations can improve the development of such lines. Thus, the aim of this study was to select BC1F2 populations of dwarf round tomatoes with agronomic potential and high-quality fruit. The study was conducted at the Vegetable Experimental Station of the Federal University of Uberlândia (UFU). A randomized block design was used, with 15 treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Backcrossing; Dwarfism; Solanum lycopersicum.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100205

Agronomic performance of mini-tomato hybrids from dwarf lines
Provedor de dados: 64
Autores: Finzi,Rafael Resende; Maciel,Gabriel Mascarenhas; Silva,Ernani Clarete da; Luz,Jose Magno Queiroz; Borba,Monique Ellis Aguilar.
ABSTRACT Little is known about the commercial potential of mini-tomato hybrids obtained from one dwarf parent. Thus, our objective was to evaluate the agronomic performance of mini-tomato hybrids obtained by crossing a dwarf line (A) with normal lines with indeterminate (I), determinate (D) and semi-determinate (SD) growth habits. The experiment was conducted in a greenhouse at the Estação Experimental de Hortaliças at the Universidade Federal de Uberlândia-UFU in Monte Carmelo, Brazil. The experiment was completely randomized with 17 treatments and four repetitions. The genetic material consisted of 16 experimental mini-tomato hybrids from the tomato germplasm bank at UFU, and a commercial hybrid (Mascot) as a control. The following variables were used to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brix; Dwarfism; Growth habit; Solanum lycopersicum.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100015