Abstract:Forage gene engineering is one of the hotspots attracting both national and international attention recently. As an excellent legume in temperate region, white clover is the first choice in artificial grassland establishment, as well as all kinds of ornamental turf and green land. However, White clover has a narrow ecological amplitute, and only adapts to warm and humid environment. The desirable growth temperature is 19~24℃, with 700~1000mm annual mean precipitation. It has a strict require for soil pH, th...