Caracterização Morfoanatômica, Contagem Cromossômica E Viabilidade Polínica De Biótipos De Azevém Suscetível E Resistentes Ao Herbicida Glyphosate

Ruchel, Q.; Várgas, Leandro; Agostinetto, Dirceu; Fernando, Juliana Aparecida; Lüdtke, Raquel; Bobrowski, Vera Lúcia

doi:10.1590/s0100-83582015000300019

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Besides, a low triploid seedlings number was found for this crossing. The incompatibility of chromosomal sets to the crosses between plants diploid♀ × tetraploid♂ was reported in Italian ryegrass and watermelon, triggering the occurrence of nonviable seeds (Ruchel et al 2015;Medina et al 1958). In spite of Italian ryegrass had a greater ratio of cross-pollination ratio, the occurrence of 95% diploid seedlings can occur due to the small self-fertilization rate, induced in this research when the plants were placed inside growth chambers to pollination and prevent the exchange of external pollen.…”

Section: Chromosome Countingmentioning

confidence: 67%

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May the crossing between diploid and tetraploid Italian ryegrass transfer glyphosate resistance to the next generation?

et al. 2020

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Italian ryegrass (Lolium multiflorum Lam.) is a grass weed found in winter cereals, with several glyphosate-resistant diploid populations. Furthermore, the use of Italian ryegrass tetraploid genotypes creates an opportunity to increase the forage demand in replacement of diploid populations. The aim of this research was to evaluate the crossing capacity between glyphosate-resistant diploid and tetraploid Italian ryegrass to transfer glyphosate resistance to the next generation. Reciprocal crosses were performed using the susceptible tetraploid cultivar INIA Titan and resistant diploid (SVA04 biotype) plants to obtain the F1 progeny. Germination testing, survival percentage, inheritance of glyphosate-resistance, and ploidy level were evaluated in F1 progeny. Crossing of susceptible tetraploid plants ♂ and glyphosateresistant diploid ♀ affected the germination and exhibited 4.5% of triploid plants. F1 progeny from the glyphosate-resistant diploid ♂ and susceptible tetraploid ♀ did not show germination problems, but 46% of the plants died during the initial seedling stage. For this progeny, 10 and 25% of the seedlings were composed of triploid and pentaploid individuals, respectively. Crosses between susceptible tetraploid ♀ and resistant diploid ♂ did not transfer the glyphosateresistant for the plants. Susceptible tetraploid ♂ crossing with diploid resistant ♀ had a reduction of 47% the glyphosate-resistant plants compared to the homozygous glyphosateresistant progeny. Overall, tetraploid Italian ryegrass can be a safe tool to reduce and manage the increase of glyphosate-resistant diploid ryegrass in field conditions.

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Section: Chromosome Countingmentioning

confidence: 67%

“…1). The incompatibility of chromosomal sets to form the embryo in DRR♀ × TSC♂ crosses can contribute strongly to the high percentage of nonviable seeds (Ruchel et al 2015). Another possibility involves errors during the meiosis in diploid plants, in which the chromosomes fail to properly segregate to daughter cells.…”

Section: Seed Germination and Viabilitymentioning

confidence: 99%

May the crossing between diploid and tetraploid Italian ryegrass transfer glyphosate resistance to the next generation?

et al. 2020

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“…In the field, the species has two biotypes with visually noticeable differences: one with a "narrow" and one with a "broad" leaf blade. This observation led to the hypothesis that differences in leaf morphology and anatomy between biotypes may be related to a number of variables, such as leaf blade length and width, sheath thickness, leaf orientation, deposition and composition of epicuticular waxes, cuticle thickening, stomatal density and their disposition on leaf surfaces and other cell types, such as bulliform cells (Ruchel et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Morphoanatomical characterization to differentiate two biotypes of Paspalum virgatum

Vasco

Marques²,

Justo³

et al. 2023

Agraria

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The species Paspalum virgatum L. is considered to be a pasture weed that causes great damage to livestock. There are two empirically identified biotypes that differ in leaf blade width. Thus, the objective of this work was to differentiate two biotypes of P. virgatum based on the main aspects of leaf morphology and anatomy. Morphological characterization used the leaves of the third node of each biotype with five replications for both of them. For anatomical characterization, the median part of the leaf of the third node was collected. The evaluations consisted in the main leaf morphoanatomical parameters. The biotypes differ in leaf area, leaf blade width, sheath length and diameter, and inflorescence and canopy height. The "narrow" leaf biotype showed lower stomatal density on both sides of the blade. Therefore, leaf blade width is valid as the basis for empirical observation of the difference between biotypes.

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Mixture of glufosinate and atrazine for ryegrass (Lolium multiflorum Lam.) control and its effect on seeds’ quality

Ulguim¹,

Agostinetto²,

Várgas³

et al. 2019

Rev. Fac. Nac. Agron. Medellín

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Ryegrass management has been difficult by the occurrence of resistant biotypes to several herbicides with different action mechanisms. Since herbicides mixes and rotations are an important alternative for resistant weed management, the objective of this work was to evaluate the interaction of the dose of the herbicides glufosinate and atrazine on ryegrass control and its seeds’ quality exposed to their association. For this study, three experiments were carried out using factorial design in field, laboratory, and greenhouse conditions. Two factors (A and B) were evaluated in each experiment, where factor A and B represented the doses of glufosinate and atrazine, respectively. Ryegrass control was evaluated in field experiment, while germination percentage and Emergence Speed Index (ESI), were obtained in laboratory and greenhouse analyses, respectively. The data were submitted to variance analysis (P≤0.05) and the significant results were analyzed through response surface graphs. For ryegrass control data, the effect of the interaction was analyzed by the Colby method; glufosinate provides efficient ryegrass control, but its association with atrazine reduces the efficiency, being characterized as an antagonism between molecules. Glufosinate herbicide application, independent of atrazine presence, reduced the ryegrass seeds quality at the post-ﬂowering stage.

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Caracterização Morfoanatômica, Contagem Cromossômica E Viabilidade Polínica De Biótipos De Azevém Suscetível E Resistentes Ao Herbicida Glyphosate

Cited by 4 publications

References 14 publications

May the crossing between diploid and tetraploid Italian ryegrass transfer glyphosate resistance to the next generation?

May the crossing between diploid and tetraploid Italian ryegrass transfer glyphosate resistance to the next generation?

Morphoanatomical characterization to differentiate two biotypes of Paspalum virgatum

Mixture of glufosinate and atrazine for ryegrass (Lolium multiflorum Lam.) control and its effect on seeds’ quality

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