烤烟新品种YH05的选育及其特征特性研究

 降低烟碱含量、优质多抗、香气品质好为烤烟育种主攻目标，以MS8610-711为母本, X 347为父本选育出雄性不育杂交种YH05。该杂交种株型筒型，田间生长势强，耐成熟，分层落黄好，大田生育期约130d。其平均产量2713.50kg/hm2，平均产值19141.95元/hm2，平均上等烟比例27.87%。该品种原烟外观质量好，平均单叶重为12.2g。其烟碱含量低于对照K326，B2F，C3F，X2F烟叶的烟碱含量较对照低26.26%，20.85%，21.47%，其它化学成分与对照相近，原烟评吸质量档次中偏上。YH05抗TMV, 黑胫病、青枯病，中抗PVY，中感赤星病、CMV，对黑胫病和TMV的抗性明显优于对照K326。该品种适宜在中等肥力地块和黑胫病、TMV高发地块种植。

Selection and Breeding of Flue cured Tobacco New Variety YH05 and Its Characteristics

Flue cured tobacco variety YH05 of male sterile hybrid was developed by crossing MS8610-711 as the female parent and X 347 as the male parent tended to develop a variety with lower nicotine level in its leaves, higher quality, multiple disease resistances and good flavor or aroma  YH05 is cylindrical, and the growth vigor in the field is rather strong and has good holding ability, its leaf ripening is very uniform, and the whole field growing period is around 130d. The average yield was 27123.50kg/hm2, and the average output value was  19141.95 Yuan/hm2; the average percentage of superior leaf was 27.87%. The flue cured leaf has good appearance quality, the average weight per leaf was 12.2g; nicotine content of the variety was relatively lower, the nicotine contents in the cured leaves of grades B2F, C3F, X2F were 26.26%, 20.85%, 21.47% respectively and all lower than those of the CK (K326); and levels of other main chemical components were similar with those of the ck. The smoking test results showed that the smoking quality of flue cured leaf of YH05 was fairly good. YH05 was resistant to TMV, black shank, bacterial wilt and moderately resistant to PVY, but it was moderately susceptible to Alternaria alternate, CMV; its resistance to TMV was obviously superior than that of K326. The variety is suitable for growing in soils with medium fertility and in the field with higher incidence of black shank and TMV.