The navy bean (Phaseolus vulgaris) - also known as haricot bean - commonly ends up covered in tomato-based sauce as baked beans, the epitomic student meal and an all-round staple of the British diet. However, navy beans don't grow well in the UK climate and so most are imported from Canada.

Scientists at the University of Warwick Crop Centre have launched a research project that will make use of the latest DNA sequencing technology to begin mapping the genes governing the traits that are needed for the navy bean to thrive in different climates - like the UK. This will lay the foundations for breeding new varieties and could also help create varieties to help farmers maintain yields in the face of climate change.

PhD student Andrew Tock is leading the project. Tock's supervisor Professor Eric Holub said, "The ultimate aim is to produce a navy bean which is less sensitive to cold soil in the spring, is resistant to common diseases that occur over the summer in the UK, and is also ready for harvest in early September.

"A shortened growing season is most important as navy beans in the UK have to be harvested in September when it is still dry to avoid autumnal damp weather which causes them to discolour."

The professor said the research at Warwick will aim to facilitate the selection of new varieties for bean breeders by "effectively providing a genetic roadmap" to identify desirable genes and traits. He added, "We hope in the near future to begin working in partnership with UK farmers to begin testing whether experimental lines are more suitable for bean production in British growing conditions."

The last time scientists in the UK looked seriously at developing a British navy bean was during the 1980s at the National Vegetable Research Station, the forerunner of Warwick Crop Centre. This historic research produced a collection of genetic resources upon which today's scientists are now drawing, though the researchers said that scientific advancements since the 1980s should make their work easier.

They hope to develop a database of genome-wide genetic markers in the DNA of different bean lines. The markers will allow the researchers to 'map' the genes controlling specific traits, such as cold tolerance for seedling establishment, early maturity for harvest, and resistance to diseases such as halo blight, which will go on to inform selection in breeding programmes and produce new varieties.

Andrew Tock commented, "Navy beans are a potentially viable rotational crop for UK farmers and we think that there could be great demand from consumers for a home-grown baked bean.We eat hundreds of millions of cans of beans every year in the UK - they are cheap, tasty and are recognised as being part of a healthy diet.

"Growing navy beans in Britain makes sense from a farming point of view too. In addition to the potential market value of locally produced navy beans, growers could stand to make agronomic gains from incorporating a nitrogen-fixing legume break crop into their rotations, which could promote soil renewal after repeated cereal and oilseed rape rotations."

This genetic database to be produced at Warwick could also provide useful information to benefit farmers in developing countries, where the common Phaseolus bean plays a vital role in contributing to food security and sustainable agricultural livelihoods as a staple food crop. Breeders in Africa and Latin America could draw on the Warwick Crop Centre database to feed into breeding programmes to create varieties adapted to local conditions and markets.