西瓜新品种‘榆农5号’的选育

Breeding of a new watermelon cultivar ‘Yunong No. 5'

‘榆农5号’是榆林市农业科学院蔬菜研究所以‘YWP为母本’、‘712D’为父本杂交育成的二倍体西瓜新品种。全生育期90 d左右,果实发育期30~31 d。果实椭圆形,果形指数1.48,深绿皮覆墨绿色条带。瓤大红,瓤质脆沙可口,中心可溶性固形物含量12%左右、边部10%,中边梯度小,种子小粒。果皮厚度1.2~1.3 cm,韧硬较耐贮运。植株长势中等偏强,抗枯萎病,耐病毒病,抗逆性强,较抗旱。主蔓长度约2.5 m,分枝能力中等。第1雌花着生于4~6节,雌花间隔5~6节,易坐果,商品瓜率95%以上。单瓜质量7 kg左右,667 m2产量可达4500 kg左右。适应性强,适宜榆林市及同类生态区种植。2013年通过陕西省非主要农作物品种审定委员会审定登记,登记编号：陕瓜登字2013001号。

＇Yunong 5＇is a new watermelon F, hybrid. Its famale parent is ＇YWP＇ and male parent is＇712D＇. The grow- ing period is 90 days and fruit developing period is 30-31 days.The fruit is oval ：shape with deep green skin and dark green stripes, and the fruit shape index is 1.48. The bright red flesh is crisp and delicious. The center sugar content is 12%. The rind is 1.2-1.3 cm, with excellent ductile and storage quality. It produces medium strong plant with good gener- al resistence. The main stem length is about 2.5 m with medium branching ability. The first female flower appears on sec- tion 4 to 6, with 5-6 female interval section. The variety is easy fruit setting with a commodity fruit rate of more than 95%. The single fruit weight is about 7 kg, and the yield on 667 m2 is about 4 500 kg. The variety has strong adaptability and is suitable for cultivation in Yulin areas and similar climates areas.