中国名柚资源与品种现状研究

关于柚类起源有3种观点，作者认为柚起源于中国，并指出柚的植物学分类地位存在争议，我国柚类的遗传资源多样化，供生产采用柚品种近百个，大致分为水田柚、文旦柚和杂种植3个品种群；同时具有极早熟、早熟、中熟和晚熟配套的柚类资源结构，近20世纪80年代以业，国家加强了对柚类生产的领导，全国柚类栽培面积从1985年的0.7万hm^2上升到1999年的万hm^2，国家农业部累计评选出3个部优、11个部优、11个金奖、10个银奖和2个铜类产品称号，其中沙田柚、玉环文旦等7个名柚品种占全国柚类栽培面积的80%左右，最后，作者指出中国柚类品种改良应着眼于5个目标大力开展。

Resources and Actualities of Breeds of Famous Citrus grandis in China

To begin with,the article introduces three viewpoints about the origin of Citrus grandis .Then on this basis, the authors clarify their own viewpoint: Citrus grandis origin is in China.With that the authors point out the disputes on the classificatory methods of Citrus grandis in botany.The resources of species and breeds of Citrus grandis in China are diverse highly, including about one hundred breeds used in Citrus grandis planting which are differentiated among Shatian yu, Wentan and hybridization. At the same time, the structure of the resources of Citrus grandis consists of exceeding prematurity, prematurity, medial maturity and late maturity. Since the eighties of the twentieth century, our country has strengthened its guidance.The planting area has increased from 0.7 ten thousand hectares in 1985 to 22 ten thousand hectares in 1999 .The agricultural ministry awarded accumulative totally thirteen ministerial honors, eleven gold medals, ten silver medals and two copper ones. Among them,seven famous Citrus grandis breeds such as Shatianyu, Yuhuan Wentan occupied have 80% of the whole planting area. Finally, the authors indicate that we should improve the Citrus grandis germplasm with an eye to five objects.