关键词: 脐橙, 芽变, 品种

Abstract: ‘Qingqiu’，a new early ripening navel orange cultivar，was selected from‘Meihong’navel orange. It’s fruits are oval or long oval，with a fruit shape index of 1.18. The average fruit weight is 270 g. The peel is orange red and its surface is smooth. The flesh is crisp，sweet，and rich flavor. Regional trial for‘Qingqiu’was performed at multiple locations in Chongqing. The results showed that its fruits ripen from the mid to late October and that the fruits are of good quality with soluble solids content of 12.9%，total acid content of 0.67%，vitamin C content of 0.59 mg ? mL-1，and edible rate of 70.8%. Filed investigation indicated that‘Qingqiu’has the characteristics of high fruit-setting rate and high yield. It had an average yield of 9.9 kg and 23.4 kg per tree in two years after planting and top grafting，respectively.

Key words: navel orange, bud mutation, cultivar