白肋烟新品种云白2号的选育及其特征特性

Breeding of a New Burley Tobacco Variety Yunbai 2 and its Characteristics

云白2号是以Kentucky14为母本、Burley64为父本杂交选育的白肋烟新品种。该品种遗传性状稳定,田间生长整齐,长势较强。打顶后平均株高152.7 cm,茎围12.2 cm,节距5.0 cm。有效叶25片,比对照多1～3片。平均腰叶长73.5 cm,宽34.1 cm,顶叶长55.6 cm,宽26.0 cm。叶形长椭圆,叶尖渐尖,叶耳中等,茎叶角度适中。叶色黄绿,叶面较平,主脉粗细中等,花序稍密,花冠红色。苗期55～60 d,大田生育期90 d左右,成熟集中。较耐肥,适应性较强。抗黑胫病,中抗TMV,感赤星病。示范区平均产量及上中等烟比例与对照相当,产值增加4.22%～10.66%,均价提高0.38～0.46元/kg,主要经济性状良好。外观质量较好,化学成分适宜,比例较协调,风格特征较明显,香味较丰富,透发性好,刺激性略大,杂气略重,吸食品质整体优于对照。

The Yunbai 2 is a new burley tobacco variety derived from Kentucky14×Burley64.Traits of this variety are stable in inheritance,and it has more compact plant architecture,trim growth in field and strong growth vigor.Average height,stem girth and internodal length are 152.7 cm,12.2 cm and 5.0 cm after decapitation,respectively.With 25 of productive leaves,the average length and width of oval lumbar leaf are 73.5 cm and 32.1 cm.Seedling stage of it is 55-60 d and the growing stage about 90 d.The variety matures simultaneously,which result in reaping and air curing easily.The variety has good fertilizer tolerance and adaptation.Yunbai 2 is resistant to TMV and black shank,but sensitive to brown spot.Although the average yield is no more than the control,the Yunbai 2 is superior in all of the other main economic characters,such as output value,average price and the middle and up grade of tobacco leaves,the variety has respectively increased by 4.22%-10.66%,0.38-0.46 yuan/kg.Not only the more appearance quality,but also the variety has more suitable and harmonious chemical constituents,which aromatic style traits are significant with abundant aroma and good permeability.In the case of internal and external quality,the Yunbai 2 is superior to the control.