Sex Determination Analysis
Mostrando 1-12 de 108 artigos, teses e dissertações.
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1. Field performance of hermaphrodite papaya plants obtained through molecular selection and micropropagation
Abstract Most commercial papaya varieties segregate hermaphrodite and female plants. Growers normally select hermaphrodite plants in the field, due to market preferences. This requires planting multiple plants per site and later thinning of the females, distinguished by flower bud inspection. Micropropagation or the use of molecular markers are two possibili
Crop Breed. Appl. Biotechnol.. Publicado em: 05/12/2019
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2. Excess Body Weight, Snack Limits and Dental Caries in Brazilian Preschoolers: A Population-Based Study
Abstract Objective: To evaluate the relationship between excess body weight (EBW) and the prevalence of dental caries in preschoolers considering parental control regarding snack consumption. Material and Methods: An observational, population-based, cross-sectional study was conducted at Municipal Child Education Centers in the city of Curitiba, Brazil, in
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 02/09/2019
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3. Prediction equations for energy values of animal meals obtained using meta-analysis
ABSTRACT The objective of this study was to determine prediction equations to estimate the nitrogen-corrected apparent metabolizable energy (AMEn) values of animal meals used in broiler diets through meta-analysis. A bibliographic review was undertaken with studies conducted in Brazil from 2000 to 2016 to catalogue information on AMEn values and the followin
R. Bras. Zootec.. Publicado em: 08/11/2018
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4. Traditional and alternative nonlinear models for estimating the growth of Morada Nova sheep
In the present study, alternative and traditional nonlinear models to describe growth curves of Morada Nova sheep reared in the state of Bahia, Brazil, were applied. The nonlinear models were: Schnute, Mitscherlich, Gompertz, Logistic, Meloun I Meloun II, III Meloun, Gamito and Meloun IV. The model adjustment was evaluated by using: Adjusted Coefficient of D
R. Bras. Zootec.. Publicado em: 2013-09
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5. Avaliação da Proporção Sexual de Embriões Desenvolvidos In Vitro e de Progênie a Campo de Touros Jovens. / Evaluation of the Sex Ratio of Embryos Developed In Vitro and in Field Progeny of Young Sires.
Some of the main problems that affect the in vitro production of embryos is the variation among bulls in relation to fertility and the greater birth of male embryos. Many factors can change the ratio 1:1 between the genders, both in the in vitro production of embryos and in the method of artificial insemination. To try to change this sex ratio in vitro, we s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/08/2011
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6. A case of leucism in the burrowing owl Athene cunicularia (Aves: Strigiformes) with confirmation of species identity using cytogenetic analysis
Leucism is an inherited disorder, characterized by the lack of pigments in part or all of the body, normal coloration of the eyes and, in birds, in naked parts such as the bill and legs. This kind of disorder is sometimes erroneously designated as albinism or partial albinism. In this study, we present a case of leucism in a wild owl. The studied individual
Zoologia (Curitiba). Publicado em: 2011-02
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7. Comparative cytogenetic analysis of two grasshopper species of the tribe Abracrini (Ommatolampinae, Acrididae)
The grasshopper species Orthoscapheus rufipes and Eujivarus fusiformis were analyzed using several cytogenetic techniques. The karyotype of O. rufipes, described here for the first time, had a diploid number of 2n = 23, whereas E. fusiformis had a karyotype with 2n = 21. The two species showed the same mechanism of sex determination (XO type) but differed in
Genetics and Molecular Biology. Publicado em: 2011
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8. Isolation, characterization and chromosomal localization of repetitive DNA sequences in Physalaemus ephippifer (Anura Leiuperidae) / Isolamento, caracterização e localização cromossômica de sequências de DNA repetitivo de Physalaemus ephippifer (Anura Leiuperidae)
Previous cytogenetic studies of Physalaemus ephippifer, a species currently allocated to the group P. cuvieri, showed an interesting female-specific chromosome heteromorphism. In 14 females of P. ephippifer, chromosome pair 8 was heteromorphic with regard to the occurrence of an NOR anda terminal C-band. Such heteromorphism was not found in the seven analyze
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/03/2010
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9. Cytogenetic analysis of Astylus antis (Perty, 1830) (Coleoptera, Melyridae): Karyotype, heterochromatin and location of ribosomal genes
Cytogenetic analysis of Astylus antis using mitotic and meiotic cells was performed to characterize the haploid and diploid numbers, sex determination system, chromosome morphology, constitutive heterochromatin distribution pattern and chromosomes carrying nucleolus organizer regions (NORs). Analysis of spermatogonial metaphase cells revealed the diploid num
Genetics and Molecular Biology. Publicado em: 07/06/2010
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10. Cytogenetic analysis of three species of Pseudacteon (Diptera, Phoridae) parasitoids of the fire ants using standard and molecular techniques
Pseudacteon flies, parasitoids of worker ants, are being intensively studied as potentially effective agents in the biological control of the invasive pest fire ant genus Solenopsis (Hymenoptera: Formicidae). This is the first attempt to describe the karyotype of P. curvatus Borgmeier, P. nocens Borgmeier and P. tricuspis Borgmeier. The three species possess
Genetics and Molecular Biology. Publicado em: 04/09/2009
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11. Pivotal temperature and sexual dimorphism of Podocnemis expansa hatchlings (Testudines: Podocnemididae) from Bananal Island, Brazil
A common problem when trying to identify the sex of hatchling turtles is that juveniles are not obviously externally dimorphic and current techniques to identify sex are often invasive. In this paper, 300 eggs of Podocnemis expansa from Bananal Island, state of Tocantins (Brazil), were incubated at constant temperatures. The carapaces of the hatchlings were
Zoologia (Curitiba). Publicado em: 2009-09
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12. Isolation and sequencing of the HMG domain of ten Sox genes from Odorrana schmackeri (Amphibia: Anura)
Sox (SRY-related HMG-box) genes encode a family of transcriptional regulators, which are characterized by a conserved 79-amino acid domain known as HMG-box. They play essential roles in a diverse range of processes including sex determination and the development of the central nervous system (CNS), neural crest and endoderm. In this paper, the HMG domain of
Zoologia (Curitiba). Publicado em: 2009-03