Stay up to date with notifications from The Independent

Notifications can be managed in browser preferences.

UK researchers seek cherry on top

Nuala Moran
Saturday 01 January 1994 19:02 EST
Comments

Your support helps us to tell the story

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.

At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.

Your support makes all the difference.

BRITISH scientists are taking part in an international project to determine the genetic structure of some of Europe's most commercially important fruit, nut and timber trees, aiming to cut 10 years off the time it takes to develop new varieties.

The study will produce a genetic map of the genus Prunus, which includes cherry, peach, plum, apricot and almond. Horticulture Research International, based at East Malling in Kent - which has a 60-year history of research into cherry varieties - will co-operate with scientists in Spain, who will work on the almond, and Italy and France, who will work on the peach. Ken Torbutt, the project leader at HRI, says the genetic map will allow breeders to choose the fruit, nut or timber qualities they want in seedlings rather than waiting years for trees to mature before the results of crosses become apparent.

In effect, this is the tree equivalent of the Human Genome Project - an international collaboration to find the position of every gene on the 23 pairs of human chromosomes. But it is on a much smaller scale. Prunus has eight chromosomes, and the study will be looking for the genes controlling 250 characteristics. The project involves establishing the position of a set of genes called markers, which are 'signposts' to the position of the genes that control the characteristics of interest to breeders.

These marker genes can then be identified from small tissue samples taken from seedlings, using a technique called the polymerase chain reaction. This technique allows multiple copies of a particular gene to be produced, making it easy to identify.' Our aim is to show how cherry genes are arranged on the chromosomes. By identifying the genes responsible for flavour, flesh colour, fruit size, vigour, pest and disease resistance, and branch angle - and establishing the position of marker genes - we can enable breeders to predict the presence of desirable characteristics even in a tiny seedling,' says Mr Torbutt.

'This means new seedlings can be selected up to 10 times faster than at present.'

There are 300 varieties of sweet cherries in the national collection, of which 10 - such as Stella and Van Merchant - are commercially dominant.

HRI is not just interested in sweet cherries. It breeds for rootstock and is also researching new varieties of Prunus avium that would be suitable as timber trees. Cherry produces a high-value reddish wood that It grows faster than oak and is resistant to damage by the grey squirrel. One important characteristic is branch angle - a timber trees should have an upright habit, because this limits the possibility of getting disease in the angle, which causes ugly knots in the wood when the branch snaps off.

(Photograph omitted)

Join our commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in