Nine programmes on the science behind gardening, presented by Alan Hibbert
3: One Parent Families
The very first Bramley apple tree grew from a seed planted in 1815. It still flourishes but cannot breed true - so how has the variety spread throughout the world?
Film editor HUGH TASMAN
Produced by BRYN brooks , RON BLOOMFIELD Book (same title), 19.50, from bookshops (Gardeners' World is on Friday at 8.0 pm)