Abstract: Wheat cultivars Liaochun No.6,76-63-1 and Yuemai No.6 are three strong spring ness ecotypes. They are insensitive to temperature in growing process and no response to low temperature in early phase of growth. These cultivars are insensitive to day-length toc. Photoperiodical reaction of cultivars has a variation. These ecctypes can pass through reproductive cycle,for instance,can heading of flowering normally in any latitude under different temperatures and illuminations in China. They can be growth in south and north areas. For their widc range of ecological adaptation,these cultivars are widely used in agricultural research and production.

Key words: Strong springness wheat, Ecological adaptation