a variety (= type) of a crop or a breed of an animal that has developed over time to suit the conditions of a particular local area

In the past there was great genetic variability in landraces of wheat planted in developing countries. 过去，发展中国家种植的小麦地方品种存在很大的遗传变异性。

Traditional crop landraces are an important component of sustainable agriculture. 传统作物地方品种是可持续农业的重要组成部分。