Consulta: creatorFacets:"Cantamutto,M"
Registros recuperados: 3
Data/hora: 10/06/2024 15:16:47

Introgression of cultivated sunflower in exotic Helianthus petiolaris populations
Provedor de dados: 46
Autores: Gutiérrez,A; Cantamutto,M; Poverene,M.
Cultivated sunflower Helianthus annuus and the wild exotic H. petiolaris are sympatric species in an extensive region of central Argentina. Both species are sexually compatible, they overlap their flowering time and share pollinators in the region. Although there are important barriers to introgression between them, interspecific hybrids are occasionally found in contact zones. We present evidences of crop introgression in H. petiolaris populations under natural conditions and controlled and semi-controlled crosses in the experimental field using morphological traits. If crop genes persist in subsequent generations after hybridization, it could then be possible to find crop morphological traits and molecular markers in hybrid offsprings. Plants of H....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop-wild; Intermediate morphology; Interspecific hybridization; RAPD.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332012000100003

Self-pollination and its implication in invasiveness of Helianthus annuus ssp. annuus AND H. Petiolaris
Provedor de dados: 46
Autores: Gutierrez,A; Rueda,F; Cantamutto,M; Poverene,M.
Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argentina in the last 70 years. As other annuals of the same genus, these species are outcrossers bearing a sporophytic self-incompatible mechanism. We investigated the ability to self-pollinate in plants of five accessions of each species, its influence on some reproductive traits, and compared to the cultivated sunflower, in which breeding for self-compatibility has been very successful. Plants were allowed to self-pollinate in bagged heads, manually forced to self-pollinate or allowed to cross-pollinate. Although both invasive species were confirmed as self-incompatible, some plants within most accessions were able to self-pollinate. There was no significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gene flow; Mating system; Seed set; Self-compatibility; Sporophytic SI.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332014000300001

Orobanche cumana wallr. resistance of commercial sunflower cultivars grown in Argentina
Provedor de dados: 46
Autores: Miladinovic,D; Dedic,B; Quiróz,F; Alvarez,D; Poverene,M; Cantamutto,M.
The parasitic weed Orobanche cumana Wallr. (broomrape) is one of the major limiting factors in worldwide sunflower production. However, it is absent in the centre of origin and in the sunflower crop areas of América. It has not yet been elucidated if O. cumana naturalization in sunflower habitats in Argentina is restricted as a result of either abiotic constraints or resistance in grown commercial cultivars. The aim of the present study was to assess the degree of resistance of commercial sunflower cultivars grown in Argentina to O. cumana. More than 95% of the tested sunflower cultivars were, in general, susceptible to broomrape attack. Although three cultivars were found to evidence an acceptable response to broomrape attack, only one of them showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broomrape; Incidence; Severity.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332012000100004