Produção de sementes de quatro ecótipos de Paspalum nativos do Rio Grande do Sul

Lopes, Rodrigo Ramos; Franke, Lucia Brandão

doi:10.1590/s1516-35982011000100004

Cited by 17 publications

(22 citation statements)

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“…The number of reproductive tillers is one of the most important and crucial components of forage grass seed productivity and, therefore, the management should be focused on favoring this component. The strong association of this component with seed yield was proven in Urochloa (Quadros et al, 2010), Paspalum urvillei (Lopes and Franke, 2011a), Paspalum notatum (Lopes and Franke, 2011b), and Panicum maximum (Canto et al, 2012) and even serves as an indicator for breeding programs that seek to produce seeds of forage species (Biligetu et al, 2012). According to Souza (2001), the increased production of reproductive tiller requires a greater number of inflorescences and, therefore, higher final seed yield.…”

Section: Resultsmentioning

confidence: 99%

“…The transition from the vegetative to the reproductive stage is not synchronized because, in the same "mother" plant, there is a hierarchy among the tillers that scales the emergence of the inflorescences. Soon, in the same plant, there is assimilated partition between the tillers in elongation (reproductive) and those younger in their development (vegetative), negatively influencing PROD (Lopes and Franke, 2011b).…”

Section: Resultsmentioning

confidence: 99%

“…Seed production per area represents the integration of individual production for all the tillers that make up the pasture (Lopes and Franke, 2011b). The pattern of tillers per plant and how it is altered under stress conditions (cuts) needs to be known.…”

Section: Resultsmentioning

confidence: 99%

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Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

et al. 2016

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-The objective of this study was to evaluate the practice of consecutive cuts in the production and quality of Paspalum guenoarum seeds of the "Azulão" ecotype. The experimental design used was in completely randomized blocks with four replications. The treatment included three cuts in succession: zero cut, one cut, two cuts, and three cuts. The variables were: number of total tillers/plant; number of vegetative tillers/plant; number of reproductive tillers/plant; percentage of reproductive tillers; number of racemes/inflorescence; weight of thousand seeds; number of seeds/inflorescence; seed production; forage dry matter; water content of seeds; germination; first germination count; and germination speed index. The largest seed production was obtained with zero cut (850.3, first year and 719.4 kg/ha -1 , second year) and one cut (794.4, first year and 627.3 kg/ha -1 , second year) with no statistical difference between them. The largest germination percentage was seen with the application of zero (71.0%, first year and 79.3%, second year) and one cut (69.3%, first year and 75.0%, second year). There was a decrease in the production and quality of the seeds of the second cut, especially during the first year of evaluation. The total tillers, the percentage of tillers that went through the reproductive stage, and the number of reproductive tillers are the variables that are most highly correlated with seed production.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

et al. 2016

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“…Therefore, the pressure of natural or artificial selection in species facing animal production aim at obtaining genotypes with emphasis on forage traits, mainly on green and total dry matter and leaf dry matter (Assis et al 2008). Thus, studies hardly ever aim at a combined selection regarding genetic gain in seed yield (Lopes and Franke 2011).…”

Section: Introductionmentioning

confidence: 99%

CG PICAÇO: a new cultivar of sudangrass with high forage performance and seed yield

Arenhardt

Silva

Gewehr

et al. 2015

Crop Breed. Appl. Biotechnol.

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“…Dificilmente almejando, desta forma, uma seleção combinada, buscando também a produção de sementes (Lopes & Franke, 2011). Inclusive em gramíneas forrageiras em que alguns autores não verificaram a possibilidade de aumentar o rendimento de forragem a partir dos caracteres ligados à produção de sementes uma vez que tendem a ser negativamente correlacionados com a produção de biomassa (Bocsa, 1981;Araújo & Coulman, 2004).…”

Section: Introductionunclassified

Variabilidade genética na busca de eficiência à produção de sementes e biomassa de capim Sudão

Silva

Arenhardt

Gewehr

2014

Rev. bras. eng. agríc. ambient.

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R E S U M OObjetivou-se, com o estudo, conhecer a variabilidade genética de caracteres ligados à inflorescência em populações de capim Sudão e a contribuição dessas variáveis na definição do caráter mais efetivo na seleção para a produtividade de sementes. Além disto, fornecer subsídios em indicar que a pressão de seleção sobre os componentes da panícula visando aos incrementos na produção de sementes, não compromete os caracteres de interesse forrageiro. Os experimentos foram realizados nos anos de 2009 e 2010, na seleção de plantas para os caracteres perfilhamento, produção de biomassa e dos que compõem a inflorescência da espécie; verificou-se que existe variabilidade genética entre as populações de capim Sudão, principalmente nos caracteres massa de panícula, número de grãos da panícula e massa de grãos da panícula, variáveis de maior contribuição sobre as diferenças morfológicas observadas na inflorescência. Correlações efetivas foram obtidas pela massa de panícula e número de grãos da panícula em incrementar a massa de grãos da panícula. A pressão de seleção sobre esses caracteres não traz prejuízos sobre a biomassa e o perfilhamento.Genetic variability in the search of efficiency for seed production and biomass of Sudan grass A B S T R A C TThe objective of the study was to investigate the genetic variability of characters linked to inflorescence in populations of Sudan grass and the contribution of these variables in defining the most effective trait selection for seed yield. In addition, to provide subsidies to indicate that the selection pressure on the components of panicle to increase seed production does not compromise the character of forage interest. The experiments were conducted in the years 2009 and 2010 in the selection of plants for the characters tillering, biomass production and making up the inflorescence of the species. It was verified that there is genetic variability among populations of Sudan grass, especially in the mass character of panicle, number of grains in panicle and grain weight, variables of greatest contribution on the morphological differences observed in the inflorescence. Correlations were obtained for the effective mass of panicle and number of grains in panicle and increase in grain weight of panicle. The selection pressure on these characters does not bring harm on biomass and tillering. IntroduçãoA diversificação de culturas anuais de verão para a produção de forragem é altamente desejável, uma vez que os custos de produção das convencionais como milho (Zea mays L.) e sorgo [Sorghum bicolor (L.) Moench] são elevados (Neumann et al., 2010). Culturas alternativas de espécies anuais para o Brasil e que vêm sendo utilizadas com grande sucesso em diversas regiões tropicais e subtropicais do globo, são o milheto, o capim Sudão e o teosinto, dentre outras (Mattos, 2003).Na produção animal a redução dos custos e a produtividade e qualidade de forragem são requisitos básicos para o sucesso da atividade; então, o emprego de plantas fisiologicamente mais eficientes no aproveita...

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Produção de sementes de quatro ecótipos de Paspalum nativos do Rio Grande do Sul

Cited by 17 publications

References 11 publications

Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

CG PICAÇO: a new cultivar of sudangrass with high forage performance and seed yield

Variabilidade genética na busca de eficiência à produção de sementes e biomassa de capim Sudão

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