IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
artículos
Título:
Grain Weight of Durum Wheat Cultivars Released in Italy
Autor/es:
RHARRABTI . Y; MIRALLES D J; MARTOS V; LF GARCIA DEL MORAL
Revista:
CEREAL RESEARCH COMMUNICATIONS
Editorial:
AKADEMIAI KIADO RT
Referencias:
Año: 2010 vol. 38 p. 134 - 145
ISSN:
0133-3720
Resumen:
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.
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.
th 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.