中文摘要：

卵巢是实蝇产卵繁殖的重要器官，卵巢构成及发育进度决定了实蝇成虫的行为活动及繁殖力。本研究从桔小实蝇羽化之日起，逐日取样观察记录了桔小实蝇卵巢发育进程，描述了桔小实蝇卵巢形态结构和发育特征，并对卵巢进行了发育等级划分。研究表明：桔小实蝇卵巢由两组卵巢管组成，每组卵巢含卵巢管28根。新羽化桔小实蝇卵巢处于发育初期，无卵巢管。羽化后第4d，卵巢管开始显现，卵巢管数量增加，至第10d左右，卵巢发育成熟。进入产卵末期，卵巢管逐渐消解，卵巢变小萎缩。本研究将桔小实蝇卵巢发育进程分为5个发育等级，即发育初期（Ⅰ级）、卵黄沉积期（Ⅱ级）、成熟待产期（Ⅲ级）、产卵盛期（Ⅳ级）和产卵末期（Ⅴ级）。本研究为开展桔小实蝇繁殖生物学和繁殖行为学深入研究提供了不可或缺的卵巢信息。

英文摘要：

The ovary is a vital reproductive organ of Bactrocera dorsalis. The ovary morphology and its development determine the reproductive behavior and also fertility of the fly. In this study, the ovarian morphological and developmental characteristics were described each day after the fly eclosion, and ovarian developmental stages were classified also. The results showed that B. dorsalis female adult has two polytrophic ovaries, each of them including 28 parallel ovarioles. No ovarioles were found in the ovaries of newly emerged B. dorsalis. The first ovarioles was detected at the 4^th day after eclosion. Along with the first ovariole development, the number of ovarioles increased gradually. The full mature ovary was recorded at the 10^th day after the fly emergence. Into last stage of the fruit fly oviposition, its ovarioles disappeared gradually, and ovaries became smaller and atrophied. Ovarian developmental progresses of B. dorsalis in this study were divided into five stages, previtellogenic stage （ Ⅰ ）, vitellogenic deposition stage （ Ⅱ） , expectant stage of mature eggs （ Ⅲ） , peak stage of oviposition （ Ⅳ） ,last stage of oviposition （ Ⅴ ）. This study provides indispensable ovarian information for B. dorsalis reproductive biology and reproductive behavior researches.