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| Registros recuperados: 189 | |
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| Contreras Toledo, Aremi Rebeca. |
| A partir de la domesticación de chile (Capsicum annuum L.) en México, se ha generado una gran diversidad dentro de esta especie en nuestro país, derivada de la selección de los agricultores para diferentes usos, siendo el chile Poblano uno de los más importantes y el más representativo del Estado de Puebla; sin embargo, el rendimiento de chile poblano en esta región ha presentado una reducción en los últimos años, debido, en parte, a la falta de semilla mejorada que debe ser seleccionada con base en las necesidades de los propios productores, existiendo la potencial pérdida de este germoplasma. Los objetivos de este estudio fueron estimar la diversidad genética y determinar sus posibles patrones de distribución, diferenciar grupos genéticos de variedades y... |
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Palavras-chave: Capsicum annuum; SSR; Polimorfismo; Diferenciación genética; Polymorphism; Genetic differentiation; Maestría; Genética. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/400 |
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| Pérez Ruíz, Elizabeth. |
| El Factor 9 de Crecimiento y Diferenciación (GDF9) es miembro de la súperfamilia β de factores de crecimiento (TGFβ) y su expresión en el ovocito es esencial para el desarrollo y crecimiento folicular. Diferentes mutaciones en el gen GDF9 han sido asociadas con el incremento de tasa de ovulación y/o prolificidad en algunas razas de ovejas, por lo que el objetivo de este estudio fue la búsqueda de polimorfismos de una sola base (SNPs) en el gen GDF9, así como la asociación entre polimorfismos del gen GDF9 y el índice de prolificidad en ovejas de la raza Pelibuey. Se tomaron muestras sanguíneas de la vena yugular de 16 ovejas y fueron conservadas en papel FTA® (Whatman Mini Card). El exón dos del gen fue amplificado mediante la técnica de Polimerase Chain... |
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Palavras-chave: Análisis de secuencias; GDF9; Mutación; Polimorfismo; PCR; SNP; Sequence analysis; Mutation; Polymorphism; Maestría; Ganadería. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1712 |
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| Contreras Toledo, Aremi Rebeca. |
| A partir de la domesticación de chile (Capsicum annuum L.) en México, se ha generado una gran diversidad dentro de esta especie en nuestro país, derivada de la selección de los agricultores para diferentes usos, siendo el chile Poblano uno de los más importantes y el más representativo del Estado de Puebla; sin embargo, el rendimiento de chile poblano en esta región ha presentado una reducción en los últimos años, debido, en parte, a la falta de semilla mejorada que debe ser seleccionada con base en las necesidades de los propios productores, existiendo la potencial pérdida de este germoplasma. Los objetivos de este estudio fueron estimar la diversidad genética y determinar sus posibles patrones de distribución, diferenciar grupos genéticos de variedades y... |
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Palavras-chave: Capsicum annuum; SSR; Polimorfismo; Diferenciación genética; Polymorphism; Genetic differentiation; Maestría; Genética. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/400 |
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| Yuan,Mei; Gong,Limin; Meng,Ronghua; Li,Shuangling; Dang,Phat; Guo,Baozhu; He,Guohao. |
| Cultivated peanut (Arachis hypogaea L.) is an oilseed crop of economic importance. It is native to South America, and it is grown extensively in the semi-arid tropics of Asia, Africa, and Latin America. Given an extremely narrow genetic base, efforts are being made to develop simple sequence repeat (SSR) markers to provide useful genetic and genomic tools for the peanut research community. A SSR-enriched library to isolate trinucleotide (GGC)n SSRs in peanut was constructed. A total of 143 unique sequences containing (GGC)n repeats were identified. One hundred thirty eight primer pairs were successfully designed at the flanking regions of SSRs. A suitable polymerase was chosen to amplify these GC-rich sequences. Although a low level of polymorphism was... |
| Tipo: Journal article |
Palavras-chave: Cultivated peanut; Microsatellites; Polymorphism; Simple sequence repeat. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600005 |
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| Song,Guo Qi; Li,Meng Jun; Xiao,Han; Wang,Xing Jun; Tang,Rong Hua; Xia,Han; Zhao,Chuan Zhi; Bi,Yu Ping. |
| Making use of the gene resources of wild type peanuts is a way to increase the genetic diversity of the cultivars. Marker assisted selection (MAS) could shorten the process of inter-specific hybridization and provide a possible way to remove the undesirable traits. However, the limited number of molecular markers available in peanut retarded its MAS process. We started a peanut ESTs (Expressed Sequence Tags) project aiming at cloning genes with agronomic importance and developing molecular markers. In this study we found 610 ESTs that contained one or more SSRs from 12,000 peanut ESTs. The most abundant SSRs in peanut are trinucleotides (66.3%) SSRs and followed by dinucleotide (28.8%) SSRs. AG/TC (10.7%) repeat was the most abundant and followed by CT/GA... |
| Tipo: Journal article |
Palavras-chave: Arachis hypogaea L.; Cultivars; EST-SSR; Polymorphism; Wild-type peanut. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300007 |
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| Ding-ping,Bai; Cheng-jiang,Yu; Yu-lin,Chen. |
| Arylalkylamine N-acetyltransferase (AA-NAT) is critical enzyme in Melatonin (MLT) biosynthesis for MLT regulating the animal seasonal breeding. In this study, DNA sequencing methods were applied to detect the polymorphisms of the AA-NAT gene in 179 Chinese sheep belonging to two non-seasonal reproduction breeds and two seasonal reproduction breeds. One mutation at exon 3 (NM_001009461:c.486A > G) was firstly described at the sheep AA-NAT locus. Hence, we described the SmaI PCR-RFLP method for detecting EX3 486A > G mutation, frequencies of the AA-NAT-G allele varied from 0.871 to 0.908 in two non-seasonal reproduction breeds and 0.517 to 0.578 in two seasonal reproduction breeds. The associations of SmaI polymorphism with estrus... |
| Tipo: Journal article |
Palavras-chave: AA-NAT gene; Polymorphism; Reproduction; Seasonality; Sheep. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000200007 |
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| Sousa,Diego Rayan Teixeira de; Santos,Carla Silvana da Silva; Wanke,Bodo; Silva Júnior,Roberto Moreira da; Santos,Marcelo Cordeiro dos; Cruz,Kátia Santana; Monte,Rossicléia Lins; Nocker,Andreas; Souza,João Vicente Braga de. |
| Background The incidence of invasive mycoses is increasing worldwide. PCR-RFLP was applied to the identification of 10 reference strains and 90 cultures of agents of invasive mycoses. In addition, the new approach was applied to detect fungal agents in 120 biological samples (blood, cerebrospinal fluid and bone marrow). PCR-RFLP results were compared with the ones obtained with conventional methods (culture, microscopy, and biochemical testing). Results The assays carried out with the reference strains (Candida albicans, Candida parapsilosis, Candida tropicalis, Candida krusei, Candida guilliermondii, Cryptococcus neoformans, Cryptococcus gattii and Histoplasma capsulatum), demonstrated that the RFLP profiles were correctly predicted by the in silico... |
| Tipo: Journal article |
Palavras-chave: Pathogenic fungus; Polymorphism; Simultaneous analysis. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000300014 |
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| Wang,Jian gang; Hou,Jin-Xing; Li,Guang; Zhu,Guang Qin; Cao,BinYun. |
| Background: Finding molecular markers linked to quantitative trait loci is the first step in marker-assisted selection (MAS). Microsatellites are excellent molecular markers because of their large numbers, even distribution in the genome, and high polymorphism. In this study, the polymerisation effect of four microsatellites (OarAE101, BM1329, BM143, and LSCV043) on litter size was analysed using microsatellite markers and pedigrees. Results: The results indicate that the polymerisation effect of four microsatellite loci significantly affected the litter size. E5E10F2F6G1G5H6H11 and E3E8F5F7G1G5H3H9 had the highest and lowest litter sizes in the F2 generation, respectively. The polymerisation effect value (v) of the E5E10 genotype was 3.18% higher than... |
| Tipo: Journal article |
Palavras-chave: Microsatellite marker; Pedigrees; Polymerisation effect; Polymorphism. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400011 |
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| Al-Faifi,Sulieman A; Migdadi,Hussein M; Algamdi,Salem S; Altaf Khan,Mohammad; Ammar,Megahed H; Al-Obeed,Rashid S; I. Al-Thamra,Mohammad; EL-Harty,Ehab H; Jakse,Jerenj. |
| Background: The present study was undertaken towards the development of SSR markers and assessing genetic relationships among 32 date palm (Phoenix dactylifera L.) representing common cultivars grown in different geographical regions in Saudi Arabia. Results: Ninety-three novel simple sequence repeat markers were developed and screened for their ability to detect polymorphism in date palm. Around 71% of genomic SSRs were dinucleotide, 25% tri, 3% tetra and 1% penta nucleotide motives. Twenty-two primers generated a total of 91 alleles with a mean of 4.14 alleles per locus and 100% polymorphism percentage. A 0.595 average polymorphic information content and 0.662 primer discrimination power values were recorded. The expected and observed heterozygosities... |
| Tipo: Journal article |
Palavras-chave: Expected and observed heterozygosity; Microsatellite markers; Polymorphic information content; Polymorphism; Primer discrimination power. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000300002 |
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| Li,Ai Qin; Zhao,Chuan Zhi; Wang,Xing Jun; Liu,Zhan Ji; Zhang,Li Feng; Song,Guo Qi; Yin,Juan; Li,Chang Sheng; Xia,Han; Bi,Yu Ping. |
| Microsatellites, or simple sequence repeats (SSRs), in expressed sequence tags (ESTs) provide an opportunity for low cost SSR development. We looked for EST-SSRs in 403,511 ESTs (generated by 454 sequencing and representing 70,654 contigs and 52,082 singletons) from soybean globular stage embryos. Among 122,736 unique ESTs, 3,729 contained one or more SSRs. In total, 3,989 SSRs were identified including 304 mono, 1,374 di, 2,208 tri, 70 tetra, 13 penta and 20 hexanucleotide SSRs. Thirty three EST-SSRs were selected for primer design and polymorphism analysis using twenty soybean cultivars and one wild-type soybean. Successful amplification was obtained using 21 of these primer pairs, 11 of which detected polymorphisms in these soybean cultivars. These... |
| Tipo: Journal article |
Palavras-chave: 454 sequencing; EST; Glycine max; Polymorphism; SSR. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500006 |
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| Medeiros,Fernanda Silva; Mendonça,Taciana Furtado de; Lopes,Katiuscia Araújo de Miranda; França,Laís Medeiros da Câmara; Silva,Andreia Soares da; Vasconcelos,Luydson Richardson Silva; Oliveira,Maria do Carmo Valgueiro Costa de; Anjos,Ana Cláudia Mendonça dos; Hatzlhofer,Betânia Lucena Domingues; Bezerra,Marcos André Cavalcanti; Araújo,Aderson da Silva; Moura,Patrícia; Cavalcanti,Maria do Socorro de Mendonça. |
| Abstract Sickle cell anemia (SCA) presents heterogenous clinical manifestations that cannot be explained solely by alterations to hemoglobin (Hb); other components such as endothelial adhesion, thrombosis and inflammation may be involved. The mannose-binding lectin (MBL) has an important role in innate immunity and inflammatory diseases. In this report, we describe an association between MBL2 polymorphism related to low production of serum MBL and the frequency of vasoocclusive events (FVOE) in children ≤ 5 years old with SCA (p = 0.0229; OR 5.55; CI 1.11-27.66). Further studies are needed to explore the role of low MBL2 in the pathophysiology of vasoocclusive events in SCA. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MBL2; Polymorphism; Sickle cell anemia; Vaso-occlusive events. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000400600 |
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| Fernández,Ilda G.; Ramírez,José Gonzalo Ríos; Vázquez,Amanda Gayosso; Arvizu,Raúl Ulloa; Morales,Rogelio A. Alonso. |
| The polymorphism of locus BoLA-DRB3.2 of the Major Histocompatibility Complex was evaluated in two northern Mexican Creole cattle populations, Chihuahua (n = 47) and Tamaulipas (n = 51). The BoLA-DRB3.2 locus was typed by amplification and digestion with restriction endonuclease enzymes (PCR-RFLP). Fifty-two alleles were detected (28 previously reported and 24 new ones). In the Chihuahua population, 18 alleles and 5.5 effective alleles were found, while in the Tamaulipas population there were 34 and 10.8, respectively. The allele frequencies ranged from 0.011 to 0.383 in Chihuahua and from 0.010 to 0.206 in Tamaulipas. The frequencies of the new alleles in both cattle populations were low (0.010 to 0.053). The expected heterozygosity was 0.827 and 0.916,... |
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Palavras-chave: BoLA-DRB3.2; Polymorphism; Creole cattle; PCR-RFLP. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500013 |
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| Oliveira,Raimundo Antonio G.; Oshiro,Marilena; Hirata,Mario H.; Hirata,Rosario D.C.; Ribeiro,Georgina S.; Medeiros,Tereza M.D.; Barretto,Orlando C. de O.. |
| In this study, we used red cell glucose-6-phosphate dehydrogenase (G6PD) activity to screen for G6PD-deficient individuals in 373 unrelated asymptomatic adult men who were working with insecticides (organophosphorus and carbamate) in dengue prevention programs in 27 cities in São Paulo State, Brazil. Twenty-one unrelated male children suspected of having erythroenzymopathy who were attended at hospitals in São Paulo city were also studied. Fifteen of the 373 adults and 12 of the 21 children were G6PD deficient. G6PD gene mutations were investigated in these G6PD-deficient individuals by using PCR-RFLP, PCR-SSCP analysis and DNA sequencing. Twelve G6PD A-202A/376G and two G6PD Seattle844C, as well as a new variant identified as G6PD São Paulo, were detected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glucose-6-phosphate dehydrogenase; Mutations; Polymorphism; Variants. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200007 |
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| Miranda-Vilela,Ana L.; Akimoto,Arthur K.; Alves,Penha C.Z.; Hiragi,Cássia O.; Penalva,Guilherme C.; Oliveira,Silviene F.; Grisolia,Cesar K.; Klautau-Guimarães,Maria N.. |
| Haptoglobin is a plasma hemoglobin-binding protein that limits iron loss during normal erythrocyte turnover and hemolysis, thereby preventing oxidative damage mediated by iron excess in the circulation. Haptoglobin polymorphism in humans, characterized by the Hp*1 and Hp*2 alleles, results in distinct phenotypes known as Hp1-1, Hp2-1 and Hp2-2, whose frequencies vary according to the ethnic origin of the population. The Hp*1 allele has two subtypes, Hp*1F and Hp*1S, that also vary in their frequencies among populations worldwide. In this work, we examined the distribution frequencies of haptoglobin subtypes in three Brazilian population groups of different ethnicities. The haptoglobin genotypes of Kayabi Amerindians (n = 56), Kalunga Afro-descendants (n =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian ethnicities; Haptoglobin; Polymorphism; Subtypes. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300005 |
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| Registros recuperados: 189 | |
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