But their variety is under-exploited, and much of it is found in poorly studied " landraces" -local varieties that have some genetic coherence but are not as selectively bred as modern cultivars.

但它们的品种还没有得到充分的开发，其中很多是在研究不足的“地方品种”中被发现的，这些地方品种具有一定的遗传一致性，但没有像现代品种那样进行选择性地培育。