Coventry, United Kingdom
May 19, 2006
Warwick HRI,
the University of Warwick's
plant research Department, has created a stand at the world
famous RHS Chelsea Flower Show in London this week. However the
star exhibit in their garden won't be multicoloured flowers or a
soothing water feature. The Warwick HRI stand will show how far
scientists have reached in breeding a range of "Super Broccoli"
and its wider brassica family which will: help us live longer,
last longer on our shelves, and use much less pesticide and
fertilizer.
The stand will have a range of
plants from the brassica family, broccoli and oilseed rape being
the most important commercial crops. Breeding better crops
entails crossing plants which possess the best properties,
usually from within the same crop (for instance restricting
oneself to just cross breeding broccoli with another type of
broccoli). However, this approach misses out the vast range of
useful properties in the larger brassica family.
The Warwick HRI researchers are
well equipped to change that situation as they have one of the
largest gene banks of vegetable brassicas in the world. With
over 6,000 plants in the gene bank the Warwick HRI research
teams have an invaluable resource enabling them to carry out
their research. This breeding work on broccoli alone is on
course to transform it into a super plant in the following ways:
Environmentally friendly
Super Broccoli
Researchers have identified
cross breeding possibilities that will give broccoli much
greater resistance to two of its greatest threats - aphids and
the bacteria Xanthomonas campestris. This will vastly reduce the
amount of pesticides that have to be used on broccoli. This
breeding programme will probably be complete within a decade.
Longer lasting Super
Broccoli
Broccoli is one of the most
difficult vegetables to keep fresh. Supermarkets find this
particularly annoying as most of their vegetables are brought in
on a 4 day cycle whilst broccoli's feeble shelf life means it is
out of phase with other vegetable deliveries as it requires its
own 3 day cycle. Adding just one more day to its shelf life
would make customers happier and supermarkets would be
overjoyed. The researchers have already taken the first steps to
cross breed broccoli with a longer shelf life and expect the
first commercially available varieties to be hitting shelves
(and staying longer on them......) again within a decade.
Super Broccoli makes longer
lasting humans
Broccoli is a rich source of
antioxidants which have a number of health properties including
defending against cancers. However broccoli's short shelf life
means those important antioxidants quickly break down and can
lose much of their power before being consumed. The cross
breeding programme creating longer shelf life will also ensure
the antioxidants remain potent for longer.
Oilseed rape oils the wheels
of industry
Another member of the brassica
family - Oilseed rape - is playing a key role in providing
biodegradable oils that can be used to manufacture a range of
environmentally favourable products. However the range of
special designer oils available from this plant source is
limited. The Warwick HRI team have begun to experiment with
expanding the range of designer oils available by cross breeding
the oil seed rape with other brassicas. Being able to produce
designer oils from carbon neutral vegetation is crucial to
sustainable manufacturing.
Even Super Broccoli needs
bodyguards
As well as a programme of cross
breeding the University of Warwick stand will show a selection
of companion plants that can be grown alongside broccoli. These
plants will not impact on the growth of the broccoli but they
act as a major diversion for pests that would otherwise attack
the broccoli. |