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Can achene selection in sunflower crop–wild hybrids by pre-dispersal seed predators hasten the return to phenotypically wild sunflowers?
(Springer, 2015-04-16)
Bird attack is a serious limitation to sunflower yield in several regions of the world, but it could also cause selection. The wild Helianthus annuus, naturalized in several regions of the world, hybridizes with the crop ...
Dormancy attributes in sunflower achenes (Helianthus annuus L.): II. Sowing date effects
(Crop Science Society of America, 2021-11)
Sunflower (Helianthus annuus L.) seed industry needs nondormant seeds (i.e., seeds with the capacity to germinate in a wide range of environmental conditions) for processing and packaging. Thus, the presence of persistent ...
Dormancy attributes in sunflower achenes (Helianthus annuus L.): I. Intraspecific variability
(Crop Science Society of America, 2021-11)
Cultivated sunflowers (Helianthus annuus L.) display variable degrees of achene dormancy at harvest and persistence during storage, interfering with high-quality hybrid seed production. Information on intraspecific variability ...
Achene structure, development and lipid accumulation in sunflower cultivars differing in oil content at maturity
(Oxford University Press, 2006-06)
Background and Aims: Sunflower cultivars exhibit a wide range of oil content in the mature achene, but the relationship between this and the dynamics of oil deposition in the achene during grain filling is not known. ...
Nitrogen Sources and Rates Effect on Yield, Nutritional Status, and Yield Components of Sunflower
(2017-08-06)
Due to the high levels of crude protein in the achene, sunflower (Helianthus annuus L.) is one of the main oilseeds grown worldwide, particularly for the oil and meal production for animal feed. Despite these advantages, ...
Pericarp-imposed dormancy in sunflower: Physiological basis, impact on crop emergence, and removal at an industrial scale
(Crop Science Society of America, 2016-03-15)
Sunflower (Helianthus annuus L.) achenes often display pericarp-imposed dormancy, which is long-lasting and causes serious problems to crop production and the seed industry. For this study we assessed an extensively used ...
Maternal environment and dormancy in sunflower: The effect of temperature during fruit development
(Elsevier Science, 2017-01)
A rapid and uniform germination in the field is an important requirement for commercial hybrid sunflower seed. Persistence of dormancy after harvest can negatively affect this aspect of seed quality, and seed lots with ...
Effect of storage temperature on dormancy release of sunflower (Helianthus annuus) achenes
(Cambridge University Press, 2018-06)
Published information regarding the effect of storage temperature on dormancy alleviation of sunflower achenes is contradictory and ambiguous. In the present study we explored the effect of temperature during dry storage ...
Parâmetros genéticos entre caracteres quantitativos no girassol como critério de seleção para produtividade de aquênios
(2013-09-01)
Two experiments were conducted in southern Brazil in no-tillage system, in order to estimate genetic parameters and the direct and indirect effects of components for achene yield as a selection criterion in sunflower. We ...