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Mating system parameters in a high density population of andirobas in the Amazon forest. Repositório Alice
CAMPOS, T. de; CUNHA, M. O. da; SOUSA, A. C. B. de; TEIXEIRA, R. B.; RAPOSO, A.; SEBBENN, A. M.; WADT, L. H. de O..
The objective of this work was to estimate the mating system parameters of a andiroba (Carapa guianensis) population using microsatellite markers and the mixed and correlated mating models. Twelve open-pollinated progeny arrays of 15 individuals were sampled in an area with C. guianensis estimated density of 25.7 trees per hectare. Overall, the species has a mixed reproductive system, with a predominance of outcrossing. The multilocus outcrossing rate (tm = 0.862) was significantly lower than the unity, indicating that self-pollination occurred. The rate of biparental inbreeding was substantial (tm - ts = 0.134) and significantly different from zero. The correlation of selfing within progenies was high (rs = 0.635), indicating variation in the individual...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Marcador microssatélite; Allogamy; Melhoramento genético vegetal; Essência florestal; Andiroba; Carapa guianensis; Reprodução vegetal; Cruzamento; Alogamia; Marcador genético; Plant breeding; Tropical wood; Crossing; Genetic markers; Microsatellite repeats; Fitomejoramiento; Madera tropical; Cruce; Marcadores genéticos; Repeticiones de microsatélite.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/966022
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Mating system parameters in a high density population of andirobas in the Amazon forest PAB
Campos,Tatiana de; Cunha,Marcia Oliveira da; Sousa,Adna Cristina Barbosa de; Teixeira,Renata Beltrão; Raposo,Andrea; Sebbenn,Alexandre Magno; Wadt,Lucia Helena de Oliveira.
The objective of this work was to estimate the mating system parameters of a andiroba (Carapa guianensis) population using microsatellite markers and the mixed and correlated mating models. Twelve open‑pollinated progeny arrays of 15 individuals were sampled in an area with C. guianensis estimated density of 25.7 trees per hectare. Overall, the species has a mixed reproductive system, with a predominance of outcrossing. The multilocus outcrossing rate (t m = 0.862) was significantly lower than the unity, indicating that self‑pollination occurred. The rate of biparental inbreeding was substantial (t m ‑ t s = 0.134) and significantly different from zero. The correlation of selfing within progenies was high (r s = 0.635), indicating variation in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carapa guianensis; Allogamy; Conservation; Genetic breeding; Microsatellite; Population size.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000500006
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Pollen-ovule relation in Adesmia tristis and reflections on the seed–ovule ratio by interaction with pollinators in two vertical strata Anais da ABC (AABC)
FERREIRA,NADILSON R.; FRANKE,LUCIA B.; BLOCHTEIN,BETINA.
The vertical distribution of pollinators is an important component in the foraging pattern of plants strata, and it influences the reproductive system (pollen/ovule ratio) and seed/ovule ratio. Niches in two different strata from Adesmia tristis Vogel were evaluated in these aspects. This plant is an endemic shrub from the Campos de Cima da Serra in Southern Brazil. The studies were carried out from January 2010, to January 2011, at Pró-Mata/PUCRS (Catholic University of Rio Grande do Sul) (29°27′-29°35′S and 50°08′-50°15′W), São Francisco de Paula, sate of Rio Grande do Sul, Brazil. Breeding system of A. tristis is mandatory allogamy. The vertical profile in A. tristis has differentiated foraging niches among the most common pollinators. Bees of Megachile...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allogamy; Bees; Foraging; Niches; Pollination deficit.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301327
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Reproductive biology aspects of two species of the genus Gavilea (Orchidaceae, Chloraeinae) in populations from Central Chile Gayana Botánica
Valdivia,Carlos E; Cisternas,Mauricio A; Verdugo,Gabriela S.
The extent to which plants depend on pollinators for outcross pollen transportation is a key issue in plant reproductive ecology. We evaluated the putative breeding system, foral display, and natural pollination in two Southern Cone of South American orchids, Gavilea araucana and G. venosa, by performing four hand pollination trials (agamospermy, autogamy, geitonogamy, and xenogamy tests) and by counting each fower and fruit produced by plants in natural conditions. Fruit set differed signifcantly depending on the origin of pollen as well as on the presence of a pollen vector. None of these species produced fruits by the agamospermy tests, therefore indicating that they require the presence of pollen on the stigmas for fruit setting. By contrast, only G....
Tipo: Journal article Palavras-chave: Autogamy; Allogamy; Self-compatibility; Foral display; Fruiting patterns.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000100005
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