Guoyou 15

Guoyou 15 (C. oleifera), a new variety authorized by the State Forestry and Grassland Administration of China in 2018, with the variety right number: 20180109, which was bred by Wang Xiangnan, Chen Yongzhong, and Wang Rui from Hunan Academy of Forestry. Plant relatively dwarf and open, crown open. Leaves green and shiny, oblong, with serrated or blunt teeth on the margins, apex acuminate, 6.5-8.2cm long, 2.5-3.4cm wide. Flowers white , terminal or axillary, solitary, twin or multiple. Petals 5-7,  apex concave , slightly reddish at the tip. Bud slightly red at the top. Blooming from mid-to-late October to December. Capsule oval, red or yellow-red, diameter 3.9cm, height 4.7cm, loci 1-4,  with 2-8 seeds. Fresh fruit yield 43%, dry seed oil content 35%, the fruit ripening period is slightly early in mid-to-late October.

国油15是2018年国家林草局授权的新品种，【品种权号】20180109，【培育人】王湘南、陈永忠、王瑞、许彦明、马力、彭邵锋、陈隆升、唐炜、张震，【品种权人】湖南省林业科学院。【品种特性】‘国油15’属普通油茶中霜降与寒露籽过渡类型，果熟期10月中下旬，亲本来自湖南省林业科学院油茶种质资源圃选择育种中优良单株。2010年以2年生苗造林于湖南长沙县路口镇油茶品种测试林基地，海拔80-100m，土壤为微酸性红壤。经连续多年观察研究，发现其生长旺，结果多，果皮鲜红，花白中略带玫红，叶绿色光亮，特征明显，是一款既可油用也可兼具观赏、经济性状优良的新品种。‘国油15’树形较矮化开张，树冠开心形；叶绿色光亮，革质，长椭圆形，边缘有细锯齿或钝齿，叶尖渐尖，叶长6.5-8.2cm，叶宽2.5-3.4cm；花白色，顶生、腋生，单生、双生或多生，花瓣5-7枚，长圆形，先端内凹，瓣尖或顶端略带红，花苞顶端略红，花期10月中下旬至12月，始花期稍早；蒴果卵圆形，红或黄红色，果径3.9cm，果高4.7cm，1-4心室，每果种子2-8粒，鲜果出鲜籽率43%，干籽含油率35%，果熟期10月中下旬略早熟。果实红色鲜艳，结果多，花白中略带玫红，叶色鲜绿，特异特征明显，遗传性状稳定。‘国油15’适宜种植于湖南省各油茶产区，南方油茶各中心产区，pH为4.0-6.0、土层深厚、土壤厚度为60-100cm或以上的微酸性红黄壤的山地丘陵等旱地。