一、龙眼选育种的目标:龙眼与其它果树或作物一样,果实大小、产量的高低与果实的品质关系非常密切,当果大,产量高的品种,往往是味道淡,品质差;而品质好,味道浓的优质品种,则往往是果小,产量低,两者成反比关系。要想得到一个既果大、产量高,又品质优等十全十美的品种是很难的,实际上也不可能。我们根据龙眼果实的用途不同,把选育种的目标分为三类。第一类,中糖大果形类型:主要用途是 First, the longan breeding objectives: Longan and other fruit trees or crops, fruit size, the level of output and the quality of the fruit is very close, when the fruit is large, high yield varieties, often taste bad, poor quality; and quality Good, rich flavor of high quality varieties, it is often fruit small, low yield, the two are inversely proportional relationship. It is hard to get a perfect variety that is high in both yield and quality, but it is virtually impossible. According to the different uses of longan fruits, we divided the objectives of breeding into three categories. The first category, large sugar-shaped fruit type: The main purpose is