A new late ripening peach cultivar 'Longmi 15'

Abstract:'Longmi 15'is a late ripening peach cultivar bred by artificial pollination. Its pedigree is'Longmi 9'×'Lixiang Youtao', made in 2005. It was initially selected in 2008 for its good taste.Through the hybrid seeds treated with low temperature stratification, 32 hybrid seedlings were obtained finally. A hybrid offspring'05-18-11'in 2010 was elected the new strain. After regional adaptability testing at five sites (including Gaolan area, Anning area, Qinan area, Jiayuguan area and Huixian area, where are all peach main producing areas in Gansu province) over five years from 2011 to 2016, it was finally selected in 2016. We applied for the registration as a new cultivar in December 2016 and got identification certificate from Forestry Variety Approval Committee of Gansu Province in 2017. The tree's growth potential is flourishing, the tree position open. Leaf is blade shape for long elliptic lanceolate. 16.6 cm in length and 3.7 cm in width. Leaf color is dark green, petiole is 0.9-1.1 cm in length, with 2-4 reniform leaf gland. Flower bud initiation section for 1-2 section. The flower is rose type, pink, pollen, pistil and stamen contour or the pistil slightly higher. The fruit is round, flat top fruit; fruit halves symmetrical, sutures shallow. Background of the fruit is white, more than 50 % of the fruit surface is covered with red. The average fruit weight is 242 g, large fruit weight is 286 g. The fruit flesh is white with red pigment around stone, hard-melting, less fiber, strong sweet. The content of fruit soluble solids, soluble sugar, organic acid and vitamin C is 14.6%, 10.2 %, 0.20 % and 5.4 mg· 100 g-1, respectively. Fruit stones are ellipsoid and clingstone.'Longmi 15'peach cultivar in Lanzhou Anning area, generally the year by the end of March to early April flower buds began to sprout, flowering in midApril, fruit ripening around September 5, fruit growth period 130-140 d, the leaves began to fall in early November, annual growth of about 229 d.'Longmi 15'peach cultivar for cultivation environment has a strong adaptability and resistance. In the central and eastern regions of Gansu Lanzhou, Tianshui and Longnan and other places as well as areas with similar ecological conditions of cultivation. To establishnew orchards, high-quality seedlings with Prunus davidiana as root stock should be used. Spacing in the rows and spacing between rows are 3 m× 4 m for three branches open shape tree and 2 m´ (4-5) m for Y shape tree.'Longmi 15'is more suitable for grow in sufficient sunlight, soil deep sandy loam.'Longmi 15'is a very fruitful cultivar, the fertilizer and water demand is higher, should be watered properly according to soil moisture.'Longmi 15'has high rate of fruit setting in natural conditions, after about six weeks of first flowering, the fruit set should be checked and deformity fruit, injured fruit and bush fruit should be thinning. The productivity should be controlled in the 37.5 tons per hm2.