The highest-ever gross output winter oilseed rape to go forward
for recommendation was launched at Cereals 2007.
From the same strong DEKALB stable as Castille and Canberra but
with a medium biomass rating, Catana combines a very high oil content
with consistently high seed yields to earn a gross output
rating of 108 in two years of NL trials. As such, it stands out
as the clear performance leader amongst the current RL candidates.
First class establishment vigour, excellent lodging resistance
at flowering and stem stiffness at harvest combined with mid-season
flowering and medium maturity, a reasonable stem canker rating
and very high light leaf spot resistance give the new variety a
particularly impressive agronomy package too.
“NL trials show Catana represents another significant step
forward in conventional oilseed rapes,” points out DEKALB
breeder, Matthew Clarke.
“Particularly so in the HGCA Northern region where its NL
gross output rating of over 122 and excellent LLS resistance – not
to mention establishment vigour – put it head and shoulders
above all currently recommended varieties.
“It stands clearly in the very high oil category but
unlike current very high oil varieties this is not at the expense
of seed yield. Nor is it linked with the later flowering and maturity
that increases pollen beetle and drought risk.
“Although Catana only has an average stem canker resistance
rating, our testing in high disease pressure environments in both
England and France have shown it outperforms varieties with higher
ratings,” he adds.
DEKALB testing under tough growing conditions further reveals
the variety has a remarkable output ability under a broad range
of environments. Under lower stress conditions, for instance, it
delivers high pod and seed numbers with a medium thousand seed
weight. Yet when under stress it compensates for lower pod and
seed numbers with a very much higher TSW.
“We see Catana being an excellent partner for lower biomass
and slightly earlier maturing Castille across most of England to
spread both the harvest and variety risk ,” explains
Matthew Clarke. “Equally, in northern England and Scotland
it complements Excalibur especially well while knocking the spots
off traditional regional favourites.”
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