Grain weight of durum wheat cultivars released in Italy and Spain during the 20 th century as affected by source - sink manipulations

The present work analysed whether grain weight is affected by changes in source: sink ratio in twenty-four durum wheat cultivars from Italy and Spain released through the 20th century grown under Mediterranean conditions. For this purpose, a field experiment was conducted during the 2002 growing-sea...

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Otros Autores: Rharrabti, Y., Miralles, Daniel Julio, Martos, V., García del Moral, Luis F.
Formato: Artículo
Lenguaje:Inglés
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Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2010Rharrabti.pdf
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Aporte de:Registro referencial: Solicitar el recurso aquí
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245 1 0 |a Grain weight of durum wheat cultivars released in Italy and Spain during the 20 th century as affected by source - sink manipulations 
520 |a The present work analysed whether grain weight is affected by changes in source: sink ratio in twenty-four durum wheat cultivars from Italy and Spain released through the 20th century grown under Mediterranean conditions. For this purpose, a field experiment was conducted during the 2002 growing-season in southeastern Spain. Sink strength was modified by removing half of the spikelets, of one side of the spike, one week after anthesis. Spikelet trimming had different effects on both average grain weight and individual grain weight at different positions within the spike. While old cultivars did not respond positively to spikelet trimming, and appear to be mainly sink-limited, intermediate and modern cultivars from Spain increased their grain weight in response to sink reductions, suggesting co-limitation by the sink and source. On the contrary, grain weight of intermediate and modern Italian cultivars remained relatively unchanged suggesting a sink-limitation to grain yield. The differential response to source-sink manipulations observed between Italian and Spanish cultivars could be attributed to their different genetic background, which determines their level of adaptation to harsh Mediterranean environments. 
653 0 |a DURUM WHEAT 
653 0 |a GRAIN WEIGHT 
653 0 |a MEDITERRANEAN CONDITIONS 
653 0 |a SOURCE-SINK MANIPULATIONS 
653 0 |a SOUTHEASTERN SPAIN 
653 0 |a TRITICUM AESTIVUM 
653 0 |a TRITICUM TURGIDUM SUBSP. DURUM 
700 1 |a Rharrabti, Y.  |9 69490 
700 1 |9 6438  |a Miralles, Daniel Julio 
700 1 |a Martos, V.  |9 69491 
700 1 |9 60440  |a García del Moral, Luis F.  
773 |t Cereal Research Communications  |g Vol.38, no.1 (2010), p.134-145 
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900 |a ^aGarcía Del Moral^bL. F. 
900 |a ^aRharrabti, Y.^tUniversidad de Granada, Dpto. de Fisiología Vegetal, Instituto de Biotecnología, 18071 Granada, Spain 
900 |a ^aMiralles, D.J.^tUniversidad de Buenos Aires Catedra de Cerealicultura, Dpto. de Producción Vegetal, IFEVA y CONICET, Av. San Martin 4453 [C1417 DSE], Buenos Aires, Argentina 
900 |a ^aMartos, V.^tUniversité Cadi Ayyad, Laboratoire ELMar, Faculté Polydisciplinaire de Safi, B.P. 4162, Safi, Morocco 
900 |a ^aGarcía Del Moral, L.F.^t 
900 |a ^tCereal Research Communications^cCereal Res. Commun. 
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900 |a SOUTHEASTERN SPAIN 
900 |a TRITICUM AESTIVUM 
900 |a TRITICUM TURGIDUM SUBSP. DURUM 
900 |a The present work analysed whether grain weight is affected by changes in source: sink ratio in twenty-four durum wheat cultivars from Italy and Spain released through the 20th century grown under Mediterranean conditions. For this purpose, a field experiment was conducted during the 2002 growing-season in southeastern Spain. Sink strength was modified by removing half of the spikelets, of one side of the spike, one week after anthesis. Spikelet trimming had different effects on both average grain weight and individual grain weight at different positions within the spike. While old cultivars did not respond positively to spikelet trimming, and appear to be mainly sink-limited, intermediate and modern cultivars from Spain increased their grain weight in response to sink reductions, suggesting co-limitation by the sink and source. On the contrary, grain weight of intermediate and modern Italian cultivars remained relatively unchanged suggesting a sink-limitation to grain yield. The differential response to source-sink manipulations observed between Italian and Spanish cultivars could be attributed to their different genetic background, which determines their level of adaptation to harsh Mediterranean environments. 
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