Guangdong academy of agricu1tural sciences ( gaas ) was established in january 1950 . it is the research center of agricultural sciences in guangdong province and directly led by the guangdong province people s government . the gaas has 13 research institutes , 5 economic entitles 4 germplasm resource nurseries , 1 key lab of health food jointly managed by moa and guangdong province , 6 provincial key labs , and 4 province engineering r & d centers 广东省农业科学院于1950年创建，是广东省政府直属科研机构和全省农业科研中心,院下设13个研究所和5个科技开发经济实体，我院设有重点实验室6个，广东省工程技术研究开发中心4个，在农业部“八五”全国地级市以上农业科研机构科研开发能力综合评估中，我院有7个研究所进入全国“百强” ，畜牧研究所列入全国农业技术开发“十强”之一，全院科技开发实力居全国省级农科院前列。
Techniques in embryo technology ( such as in vitro production of embryos and animal cloning ) need large quantities of high quality oocytes . but the quality of in vitro matured oocytes from slaughtered animals is generally lower than that of the in vivo matured oocytes . it is usually thought that the reason for this poor quality in in vitro matured oocytes is the lack of capacitation during the dominancy of follicular development in vivo 目前胚胎工程技术研究和开发(如体外生产胚胎和体细胞克隆等)需要大量高质量的成熟卵母细胞，但利用屠宰动物卵巢卵母细胞经过体外成熟培养而获取的卵母细胞质量还远不如体内成熟卵母细胞，其原因一般认为是由于缺乏体内主卵泡阶段的获能作用。
