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| Registros recuperados: 14 | |
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| Pucciariello,Ornella; Ortiz,Alejandra M; Fernández,Aveliano; Lavia,Graciela L. |
| El análisis cariotípico fue realizado en las especies parentales Arachis pintoi y A. repens, y el híbrido interespecífico. Las tres entidades presentan la misma fórmula cariotípica (18m+2sm) y un par de cromosomas satelitados. Este par satelitado presenta un par de bandas proximales CMA+ que corresponden a la heterocromatina asociada a NORs, en coincidencia con la localización de loci ADNr 45S. El número de bandas DAPI+ identificadas oscilan entre 3 y 5 pares. El número de sitios ADNr 5S fue variable, con 4 en A. pintoi, 2 en A. repens y un número intermedio de 3 en el híbrido. Los resultados obtenidos demuestran similitudes cromosómicas entre las especies parentales, indicando que constituyen un grupo natural. Por otro lado, las tres entidades mostraron... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis; Caulorrhizae; Híbrido interespecífico; Análisis cariotípico; Grupo natural; Irregularidades meióticas. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722013000100008 |
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| VEIGA,RENATO FERRAZ DE ARRUDA; QUEIROZ-VOLTAN,RACHEL BENETTI; VALLS,JOSÉ FRANCISCO MONTENEGRO; FÁVERO,ALESSANDRA PEREIRA; BARBOSA,WILSON. |
| Caracterizaram-se morfologicamente os acessos de germoplasma de espécies silvestres brasileiras de amendoim do gênero Arachis L., Sect. Arachis e analisaram-se a similaridade genética entre acessos da mesma espécie e entre as espécies. Realizou-se o experimento nos anos agrícolas de 1993 a 1996, no Núcleo Experimental de Campinas, do Instituto Agronômico (IAC). Avaliaram-se os acessos disponíveis no Banco Ativo de Germoplasma de Espécies Silvestres de Arachis, da Embrapa Recursos Genéticos e Biotecnologia (CENARGEN - Brasília, DF), das espécies A. palustris Krapov., W.C. Gregory & Valls, A. decora Krapov., W.C. Gregory & Valls, A. praecox Krapov., W.C. Gregory & Valls e A. stenosperma Krapov. & W.C. Gregory, efetuando-se... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amendoim-silvestre; Caracterização morfológica; Arachis. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052001000300003 |
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| Angelici,Carla M.L.C.D.; Hoshino,Andrea Akemi; Nóbile,Paula Macedo; Palmieri,Dario Abel; Valls,José F. Montenegro; Gimenes,Marcos A.; Lopes,Catalina Romero. |
| The genus Arachis (Fabaceae) native to South America, contains 80 species divided into nine sections, three of which contain species of special economic importance such as the cultivated peanut (Arachis hypogaea), belonging to the section Arachis, and some perennial forage species from sections Caulorrhizae and Rhizomatosae. We used microsatellite markers to assay genetic variability among 77 accessions of four species from section Rhizomatosae, the diploid Arachis burkartii (2n = 2x = 20) and the tetraploid Arachis glabrata, Arachis pseudovillosa and Arachis nitida (2n = 4x = 40). A total of 249 alleles were found in the fifteen loci analyzed and a high degree of intra and interspecific polymorphism was detected. The lowest intraspecific variation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis; Genetic diversity; Microsatellite; Peanut; Rhizomatosae. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100016 |
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| Gimenes,Marcos A.; Lopes,Catalina R.; Valls,Jose F.M.. |
| Amplified Fragment Length Polymorphism (AFLP) was used to establish the genetic relationships among 20 species from seven of the nine sections of genus Arachis. The level of polymorphism among nine accessions of the cultivated peanut, A. hypogaea L., was also evaluated. Three combinations of primers were used to amplify the AFLPs. The fragments were separated in 6% denaturing acrylamide gels. A total of 408 fragments were analyzed. An average of 135.3 fragments per primer combination were scored, and the largest number of fragments was 169 using primer combination Eco RI - ACC / Mse I - CTG, while the lowest was 108, with Eco RI - ACT / Mse I - CTT. In general, the genetic relationships established using AFLPs agreed with the classification established... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AFLP; Arachis; Peanut; Taxonomic relationship. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000300017 |
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| Ncube Kanyika,Busisiwe T; Lungu,Davies; Mweetwa,Alice M; Kaimoyo,Evans; Njung'e,Vincent M; Monyo,Emmanuel S; Siambi,Moses; He,Guohao; Prakash,Channapata S; Zhao,Yongli; de Villiers,Santie M. |
| Background This study aimed to identify and select informative Simple Sequence Repeat (SSR) markers that may be linked to resistance to important groundnut diseases such as Early Leaf Spot, Groundnut Rosette Disease, rust and aflatoxin contamination. To this end, 799 markers were screened across 16 farmer preferred and other cultivated African groundnut varieties that are routinely used in groundnut improvement, some with known resistance traits. Results The SSR markers amplified 817 loci and were graded on a scale of 1 to 4 according to successful amplification and ease of scoring of amplified alleles. Of these, 376 markers exhibited Polymorphic Information Content (PIC) values ranging from 0.06 to 0.86, with 1476 alleles detected at an average of 3.7... |
| Tipo: Journal article |
Palavras-chave: Arachis; African varieties; Disease; SSR. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000200001 |
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| Pacheco,Georgia; Gagliardi,Rachel Fátima; Cogliatti,Mariana Buturini; Manhães,Harlen Barreira; Carneiro,Leonardo Alves; Valls,José Francisco Montenegro; Mansur,Elisabeth. |
| The objective of this work was to evaluate the influence of substrate and preconditioning treatments on the acclimatization of in vitro plants of Arachis retusa. Plants were transferred to Plantmax or sand, and fertilized with Hoagland's nutrient solution. Plants maintained in sand, with or without fertilizer, showed the highest survival rates. In order to evaluate the influence of in vitro preconditioning treatments, stem segments were cultured on MS medium supplemented with different sucrose concentrations. The highest survival and developmental rates were observed in plants from two accessions cultured on MS supplemented with 1.5% and 3% sucrose. Flowering and fruit production were observed after five months. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis; Groundnut; In vitro conservation; Micropropagation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000100023 |
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| Franco,Ana Luiza; Figueredo,Amanda; Pereira,Lívia de Moraes; Sousa,Saulo Marçal de; Souza,Gustavo; Carvalho,Marcelo Ayres; Simon,Marcelo F.; Viccini,Lyderson Facio. |
| Abstract Stylosanthes (Papilionoideae, Leguminosae) is a predominantly Neotropical genus with ~48 species that include worldwide important forage species. This study presents the chromosome number and morphology of eight species of the genus Stylosanthes (S. acuminata, S. gracilis, S. grandifolia, S. guianensis, S. hippocampoides, S. pilosa, S. macrocephala, and S. ruellioides). In addition, staining with CMA and DAPI, in situ hybridization with 5S and 35S rDNA probes, and estimation of DNA content were performed. The interpretation of Stylosanthes chromosome diversification was anchored by a comparison with the sister genus Arachis and a dated molecular phylogeny based on nuclear and plastid loci. Stylosanthes species showed 2n = 20, with low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis; Cytogenetics; Evolution; Leguminosae; Stylosanthes. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100306 |
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| Registros recuperados: 14 | |
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