Contribution of pre-anthesis photoassimilates to grain yield: Its relationship with yield in Argentine sunflower cultivars released between 1930 and 1995

Autor: Antonio J. Hall, N. Trapani, Mónica López Pereira, Andrés Berney
Rok vydání: 2008
Předmět:
Zdroj: Field Crops Research. 105:88-96
ISSN: 0378-4290
DOI: 10.1016/j.fcr.2007.08.002
Popis: Published analyses of the changes in yield potential of the sunflower crop in Argentina across cultivars released between 1930 and 1995 suggested that part of the observed increase in yield potential could have arisen from a larger contribution from non-structural carbohydrates (NSC) present in the crop at anthesis. To test this idea, stems and receptacles were harvested at intervals over the anthesis–post-physiological maturity phase from crops, grown under good water and nutrient availability conditions, of three open-pollinated (OP) cultivars and five hybrids released at various times between 1930 and 1995. Stem NSC and structural biomass (SB) at anthesis diminished in the hybrids as compared with the OP cultivars (and across year of cultivar release), in spite of the fact that some hybrids had a significantly greater (p
Databáze: OpenAIRE
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