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  • 1
    Online Resource
    Online Resource
    Amphicarpy in Trifolium argentinense: morphological characterisation, seed production, reproductive behaviour and life strategy
    CSIRO Publishing ; 2013
    In:  Australian Journal of Botany Vol. 61, No. 2 ( 2013), p. 119-
    Details
    In: Australian Journal of Botany, CSIRO Publishing, Vol. 61, No. 2 ( 2013), p. 119-
    Abstract: Trifolium argentinense Speg. is an amphicarpic species that occurs naturally in native pastures of Rio Grande do Sul, southern Brazil. Amphicarpy is a rare mode of reproduction in which aerial and subterranean seeds are produced by the same individual. In the present paper, we compare morphology, anther number, pollen viability, seed production and mode of reproduction of T. argentinense flowers, and comment on the life strategy of the species. Plants grown from aerial seeds and from the regrowth of storage roots of aerial plants had longer stolons and a larger plant diameter than did those grown from subterranean plants. Plants grown from seeds were also taller than plants grown from storage roots. More resources were allocated to subterranean reproduction in plants of subterranean origin than in those of aerial origin. Aerial flowers produced more seeds, presented more anthers and produced more pollen grains than did the subterranean ones. T. argentinense is a versatile species, self- and cross-pollinated, consistent with the values of high polymorphism information content. T. argentinense adopts the ‘pessimistic strategy’ (early allocation of energy to large subterranean propagules), common in amphicarpic species when growing in disturbed habitats, such as the native pastures of Rio Grande do Sul, where intense grazing and trampling, as well as long seasonal dry spells, may periodically destroy the aerial plants, thus assuring survival by germination of subterranean seeds and regrowth of storage roots.
    Type of Medium: Online Resource
    ISSN: 0067-1924
    URL: Article
    DOI: 10.1071/BT12321
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 1496155-6
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Molecular Characterization of the USDA White Clover (Trifolium repens L.) Core Collection by RAPD Markers
    Springer Science and Business Media LLC ; 2006
    In:  Genetic Resources and Crop Evolution Vol. 53, No. 5 ( 2006-08), p. 1081-1087
    Details
    In: Genetic Resources and Crop Evolution, Springer Science and Business Media LLC, Vol. 53, No. 5 ( 2006-08), p. 1081-1087
    Type of Medium: Online Resource
    ISSN: 0925-9864 , 1573-5109
    URL: Article
    DOI: 10.1007/s10722-005-0780-4
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2006
    detail.hit.zdb_id: 2015535-9
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    Agronomic performance and interspecific hybrids selection of the genus Paspalum
    FUNEP ; 2015
    In:  Científica Vol. 43, No. 4 ( 2015-10-01), p. 388-
    Details
    In: Científica, FUNEP, Vol. 43, No. 4 ( 2015-10-01), p. 388-
    Type of Medium: Online Resource
    ISSN: 1984-5529 , 0100-0039
    URL: Article
    DOI: 10.15361/1984-5529.2015v43n4p388-395
    Language: Unknown
    Publisher: FUNEP
    Publication Date: 2015
    detail.hit.zdb_id: 2490298-6
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  • 4
    Online Resource
    Online Resource
    Genetic gain in apomictic species of the genus Paspalum
    FapUNIFESP (SciELO) ; 2017
    In:  Revista Ceres Vol. 64, No. 1 ( 2017-02), p. 60-67
    Details
    In: Revista Ceres, FapUNIFESP (SciELO), Vol. 64, No. 1 ( 2017-02), p. 60-67
    Abstract: RESUMO O objetivo do trabalho foi fornecer subsídios para obtenção de ganho genético em espécies apomíticas do gênero Paspalum pela identificação de caracteres que evidenciem simultaneamente alta correlação e herdabilidade. Assim, dimensionar o quanto da variação fenotípica é devido a efeitos genéticos e ambientais e o grau de associação existente entre a produção da matéria seca de folha como outros caracteres de interesse forrageiro de mais fácil seleção e aferição, proporcionará agilidade e economia no processo de seleção de plantas forrageiras. O experimento foi conduzido nos anos de 2009/10 e 2010/11 nos municípios de Eldorado do Sul e Augusto Pestana, RS, Brasil, em um delineamento experimental de blocos casualizados com três repetições. Nos acessos apomíticos do gênero Paspalum o aumento da pressão de seleção direta sobre a matéria seca total e de folhas é fortalecida pela maior contribuição dos efeitos genéticos do que ambientais sobre a composição da variância fenotípica. O ganho genético na produção de folhas se mostra eficiente via seleção indireta pela matéria seca total, caráter de elevada herdabilidade e de mais fácil seleção e aferição.
    Type of Medium: Online Resource
    ISSN: 0034-737X
    URL: Article
    DOI: 10.1590/0034-737x201764010009
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2017
    detail.hit.zdb_id: 2519385-5
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  • 5
    Online Resource
    Online Resource
    Genetic variation in polyploid forage grass: Assessing the molecular genetic variability in the Paspalumgenus
    Springer Science and Business Media LLC ; 2013
    In:  BMC Genetics Vol. 14, No. 1 ( 2013-12)
    Details
    In: BMC Genetics, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2013-12)
    Abstract: Paspalum (Poaceae) is an important genus of the tribe Paniceae, which includes several species of economic importance for foraging, turf and ornamental purposes, and has a complex taxonomical classification. Because of the widespread interest in several species of this genus, many accessions have been conserved in germplasm banks and distributed throughout various countries around the world, mainly for the purposes of cultivar development and cytogenetic studies. Correct identification of germplasms and quantification of their variability are necessary for the proper development of conservation and breeding programs. Evaluation of microsatellite markers in different species of Paspalum conserved in a germplasm bank allowed assessment of the genetic differences among them and assisted in their proper botanical classification. Results Seventeen new polymorphic microsatellites were developed for Paspalum atratum Swallen and Paspalum notatum Flüggé, twelve of which were transferred to 35 Paspalum species and used to evaluate their variability. Variable degrees of polymorphism were observed within the species. Based on distance-based methods and a Bayesian clustering approach, the accessions were divided into three main species groups, two of which corresponded to the previously described Plicatula and Notata Paspalum groups. In more accurate analyses of P . notatum accessions, the genetic variation that was evaluated used thirty simple sequence repeat (SSR) loci and revealed seven distinct genetic groups and a correspondence of these groups to the three botanical varieties of the species ( P . notatum var. notatum , P . notatum var. saurae and P . notatum var. latiflorum ). Conclusions The molecular genetic approach employed in this study was able to distinguish many of the different taxa examined, except for species that belong to the Plicatula group, which has historically been recognized as a highly complex group. Our molecular genetic approach represents a valuable tool for species identification in the initial assessment of germplasm as well as for characterization, conservation and successful species hybridization.
    Type of Medium: Online Resource
    ISSN: 1471-2156
    URL: Article
    DOI: 10.1186/1471-2156-14-50
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2013
    detail.hit.zdb_id: 2041497-3
    detail.hit.zdb_id: 3058779-7
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Produção agronômica de uma coleção de acessos de Paspalum nicorae Parodi
    FapUNIFESP (SciELO) ; 2011
    In:  Revista Brasileira de Zootecnia Vol. 40, No. 3 ( 2011-03), p. 498-508
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 40, No. 3 ( 2011-03), p. 498-508
    Abstract: This study was carried out to evaluate a collection of 53 accessions of Paspalum nicorae, introduced in two physiographically distinct regions over two years, with the objective of characterizing production and quality of forage of access for subsequent phases of a forage plant breeding program. The accessions were established in lines in randomized block design with three replications and the evaluations were performed from October 2007 to February 2009 by using cuts. There was variation of forage production among access over time and among sites. The majority of the accessions of P. nicorae presented high forage yield when compared with the control (P. notatum cv. Pensacola) and some accessions presented very expressive performances. The percentages of crude protein obtained from accessions in the collection were similar to the ones found in the control access. The accessions 28B and 26A of P. nicorae are indicated for subsequent stages in a program of forage plant breeding.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982011000300006
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2011
    detail.hit.zdb_id: 2078814-9
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  • 7
    Online Resource
    Online Resource
    Produção de forragem de capim-elefante sob clima frio: 2. produção e seletividade animal
    FapUNIFESP (SciELO) ; 2005
    In:  Revista Brasileira de Zootecnia Vol. 34, No. 2 ( 2005-04), p. 425-432
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 34, No. 2 ( 2005-04), p. 425-432
    Abstract: This work was aimed to compare the production and animal selectivity of elephant grass cultivars in the cold conditions, of Southern Brasil (Lages, Santa Catarina). Twelve cultivars of elephantgrass were used (Mineiro X-23A, Mineiro, Taiwan A-144, CAC-262, Mole da Volta Grande, Teresópolis, Vrukwona, Merckeron Pinda, Turrialba, Porto Rico, Taiwan A-148 and Cameroon), established on 17.5 m² plots in a randomized block design, with three replicates. Each plot consisted of seven lines with 0,50 m interval, using the tree central lines for measurements. These measurements were made on January, March and May of 1985 and 1986, each time the plants height reached 1.5 m. The animal selectivity was done on January and March of 1987, giving scores to the forage after grazing the plots (Botanal method). There was a significant effect of years and cultivars on total forage yield, but the interaction was not significant. On the average, the yield potential ranged from 11 to 21 t DM/ha. There was a 27% reduction on forage yield on the second year (12,116 kg DM/ha of average), compared with the first year (16,662 kg DM/ha). The cultivar Mineiro X-23A presented the highest forage yield and the cultivar Porto Rico showed the highest proportion of leaves and animal selectivity and the cultivar CAC-262 the highest stability, presenting a smaller variance on the two years of evaluations.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982005000200009
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2005
    detail.hit.zdb_id: 2078814-9
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  • 8
    Online Resource
    Online Resource
    Variabilidade genética em populações naturais de Bromus auleticus Trin. ex Nees (Poaceae) com base em isoenzimas e marcadores RAPD
    FapUNIFESP (SciELO) ; 2005
    In:  Revista Brasileira de Zootecnia Vol. 34, No. 6 ( 2005-12), p. 1897-1904
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 34, No. 6 ( 2005-12), p. 1897-1904
    Abstract: Bromus auleticus is a perennial, native species of the state of Rio Grande do Sul, which has demonstrated adaptability, potential yield of good quality forage as well as high morphological diversity. This work has analyzed band patterns from enzymatic systems and RAPD markers, with the objective to access the genetic variability in 16 accessions of Bromus auleticus from Rio Grande do Sul. The variability was evaluated using Jaccard similarity index. The method of grouping based on the average (UPGMA) was used in cluster analyses. The similarity index ranged from 0.0 to 0.50 using isozumes and from 0.15 to 0.71 using RAPD markers. The data have been efficient for the formation of different groups, indicating the genetic variability of the accession analyzed. However, these groupings have little relationship with the respective collecting places. The genetic variability of the accessions is important to the genetic improvement, allowing future genotype selection based on their respective performances. The simultaneous utilization of isozymes and RAPD was efficient in characterizing the genetic diversity of the accessions evaluated.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982005000600013
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2005
    detail.hit.zdb_id: 2078814-9
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  • 9
    Online Resource
    Online Resource
    Caracterizações morfológica e agronômica e divergência genética em germoplasma de trevo-branco
    FapUNIFESP (SciELO) ; 2006
    In:  Revista Brasileira de Zootecnia Vol. 35, No. 4 suppl ( 2006-08), p. 1601-1610
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 35, No. 4 suppl ( 2006-08), p. 1601-1610
    Abstract: This work aimed to evaluate morphological features of the white clover core collection obtained from the United States Department of Agriculture (USDA), represented by 78 accessions, in order to characterize the existent morphological variability and to estimate the genetic divergence, using nine characters (eight morphological and one agronomic). Seventeen plants from each access were evaluated individually at the Experimental Station of the Universidade Federal do Rio Grande do Sul in Eldorado do Sul and characterized in relation to the following characters: plant height, growth habit, flowering intensity, stolon length, node number per stolon, internode length, stolon diameter, total dry matter yield and leaf area per plant. Using the estimate of Mahalanobis' distance, the results showed that the accessions 1 (PI 195534) and 10 (PI 419325) presented the greatest distance (45.4), while the accessions 58 (PI 180491) and 68 (PI 197830) presented the smallest distance (0.19). The leaf area was the character with the largest individual relative contribution to the genetic divergence (24%), followed by plant height (20%), flowering intensity (19%) and total dry matter yield (15%). There was a positive and highly significant correlation between plant height and leaf area (0.92) and also between stolon length and internode length (0.90).
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982006000600005
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2006
    detail.hit.zdb_id: 2078814-9
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  • 10
    Online Resource
    Online Resource
    Características morfológicas de plantas de alfafa relacionadas à aptidão ao pastejo
    FapUNIFESP (SciELO) ; 2009
    In:  Revista Brasileira de Zootecnia Vol. 38, No. 3 ( 2009-03), p. 418-421
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 38, No. 3 ( 2009-03), p. 418-421
    Abstract: The morphological characteristics of alfalfa plants associated to the grazing aptitude were evaluated in this trial. Three Crioula alfalfa populations originated from different regions without grazing history were evaluated: Chile, Roque Gonzales and Vale do Taquari, besides two North American cultivars, ABT 805, selected under grazing and CUF 101, selected under mowing. The trial was composed of plots with different materials, kept under grazing, where the grazing residue was constantly kept at 3-5 cm of height during a 255-day period under continuous stock. At the end of the experimental period, the plant survival percentage was calculated, which served as a parameter to stratify the genotypes in relation to the grazing adaptation level. ABR cultivar presented the highest survival percentage and CUF cultivar the smallest. Crioula populations Chile and Vale do Taquari had intermediate, while Roque Gonzales had survival rate similar to that of CUF cultivar. The morphological characterization results did not show differences in relation to the crown retractile growth, crown area, leaf area, specific leaf area, number of stems per plant and type of stem per plant (basilar or axial). Differences in relation to the stem/leaf ratio were observed for ABT cultivar, influenced by the smaller mass of stems per plant. The expression of the number of buds per carbon unit allocated to the stems was higher for ABT cultivar, becoming an efficient functional descriptor of the grazing aptitude, called as specific bud.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982009000300003
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2009
    detail.hit.zdb_id: 2078814-9
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