中晚熟杏新品种——‘陇杏1号’的选育

Breeding of a new mid- late- maturing apricot cultivar——‘Longxing No. 1'

‘陇杏1号’是以甘肃地方优良品种‘曹杏’为母本，通过自然杂交、实生选育的优质中晚熟杏新品种。该品种果实圆形，平均单果质量70．5g，最大单果质量82．6g。果面底色为黄色，阳面具红晕，外观美丽。果肉浅黄色，肉质细，纤维少，汁液多，酸甜适口，可溶性固形物含量14．5％，可溶性糖含量12．35％，可滴定酸含量1．42％，维生素C含量0．15mg·g^-1，品质上等。离核、甜仁，可食率96．1％。果实发育期102d，在兰州榆中8月上旬成熟。耐寒、耐旱、耐瘠薄土壤，适应性广，抗病性强。常温下货架期5~6d。适宜在甘肃中东部兰州、平凉、庆阳等地及生态条件相似地区栽培，定植后第3年结果，第5年产量22680kg·hm^-1，丰产稳定性好。

＇ Longxing No.l＇ is a new mid-late-maturing apricot cuhivar with attractive appearance and excellent quality. Origi- nated from seedlings and artificial selection of ＇Caoxing＇ （a local fine cuhivar in Gansu province）as female parent in 1998 at experimental field. It was initially selected in 2002 for its large fruit, good quality and mid-late ripening time. Through seed- ling breeding technology, 350 seeds were got in 1998. After regional adaptability testing at four sites （including Lanzhou area, Pingliang area, Tianshui area and Qingyang area, where are all apricot main producing areas in Gansu province） over four years from 2008 to 2012, it was finally selected in 2013. We applied for the new cultivar registration a in 2014 and got identifi- cation certificate from Crop Variety Approval Committee of Gansu province in 2015. The tree growth vigor is strong and tree gesture is half opened with the purple brown trunk and round crown under natural circumstances. One-year -old shoots has a red-brown skin and it＇ s lenticels is white, oblong, medium size and medium density. The shape of leaf is nearly round, the surface of leaf is flat and smooth with dark green color. Leaf margin is tidy with blunt, medium deep sawtooth. The petiole is red with an average length is 4.1 cm. Leaf glands is round and the number is 1-2. The distance between two buds is short and the average length is only 1.9 era. The color of the flower is light pink with 5 petals, 1 pistil and 21-27 stamens. The fruit is round with an attractive appearance and the longitudinal diameter, transverse diameter and side diameter are 4.5 cm, 4.5 era, 4.4 era, respectively. The new cuhivar has a flat fruit top and the suture is shallow and not obvious, and both sides are symmetrical. The fruit peel is yellow and the sunny side is rosy red. The average fruit weight is 70.5 g, and the heaviest one is 82.6 g. ＇Longxing No.l＇ has light yellow flesh with delicate texture and less fiber, pleasant sweetness and sourness, abundant juice and intense fruity aromas. The content of soluble solids, soluble sugar, titratable acidity, vitamin C account for 14.50%, 12.35%, 1.42%, 0.15 rag＂ g-l, respectively. In sammary, the quality of ＇Longxing No.l＇ is excellent. The stone is oval with smooth surface, free to the flesh and the kernel is full and sweet. The average mass of a fresh stone is 2.75 g, so the edible rate can reach up to 96.1%. The fruit development period is 102 d and its maturity date at early August in Yuzhong area, where is belong to Lanzhou city, Gansu province, China. The main fruit branches are short and bouquet shaped branches, the