Bangor, Wales
February 28, 2005It’s
the news they have all been waiting for. After years of living
under the threat of another devastating epidemic of downy
mildew, a disease similar to that which caused the Irish potato
famine, India’s poorest farmers have been offered a lifeline in
the form of a new disease-resistant hybrid. The hybrid has been
produced in record time using modern biotechnology techniques.
In February 2005, India released its first hybrid using modern
DNA techniques. “This is something new and something very big”
stated Professor Witcombe, from the
University of Wales, Bangor
who manages the research programme “it has taken an
international team of scientists more than a decade of hard work
to produce this new hybrid and I believe it marks the beginning
of a revolution in pearl millet breeding.”
The fact that revolutionary DNA techniques have been used to
improve a crop that is grown only by the poorest farmers in
India and Africa is nothing short of remarkable. Until now
agricultural biotechnology has been driven almost exclusively by
the private sector for farmers in the developed world. “We want
to change all that and give the poorest farmers a real chance of
benefiting from the first products of this new Gene Revolution”
says Tom Hash, a plant breeder from ICRISAT, a member of the
research team.
The crop in question is pearl millet; know as the poor man’s
crop because it grows in the hottest, driest places where no
other crop can survive. Tens of millions of poor people depend
on its grain to eat and its leaves and stems to feed to their
animals. More than half of the world’s pearl millet is grown in
India where it seems to survive almost anything – anything that
is, except downy mildew. This devastating disease can destroy up
to one third of the crop and worryingly the most popular pearl
millet hybrid grown in India is now showing signs of
susceptibility to the disease. If the disease hits the crop in
epidemic proportions then farmers are looking at losses in grain
yield worth at least US$ 8 million.
A solution was needed and needed quick. Traditional plant
breeding for resistant hybrids can be a cumbersome and slow
process so scientists turned to biotechnology for answers. The
UK Department for International Development funded an
international team of scientists to develop the tools to read
the genetic sequence of pearl millet. With the help of the
genetic map, scientists were able to identify the genes required
for resistance to downy mildew. Resistant genes were taken from
pearl millet grown in Africa and India and introduced into one
of the parents of the new hybrid. No foreign genes were
introduced and the hybrid was produced naturally so the product
was the same as that of traditional breeding – not a GMO.
“The application of biotechnology has produced this new hybrid
in a third of the time usually required and so has given us a
head-start in the fight against the disease” says Witcombe.
“downy mildew is a slippery customer that eventually manages to
get past our defences. It’s the battle we’ve won but not the
war” |