EVALUATION OF TOBACCO MOSAIC RESISTANCE FACTOR TRANSFERRED FROM BURLEY TO FLUE-CURED TOBACCO
EVALUATION OF TOBACCO MOSAIC RESISTANCE FACTOR TRANSFERRED FROM BURLEY TO FLUE-CURED TOBACCO
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DOI：
10.1093/oxfordjournals.jhered.a108919
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发表时间：
1978-01-01
影响因子：
3.1
通讯作者：
MANN, TJ
中科院分区：
文献类型：
--
作者：
CHAPLIN, JF;MANN, TJ
利用转基因技术获得了含N.白肋21号的花叶抗性为白肋型。采用回交方法将抗花叶病基因导入6个烤烟品种。从每个回交家系中选出2个抗病材料和1个感病材料与轮回亲本进行农艺性状和化学性状的比较。花叶抗性因子与产量下降和品质不佳有关。这些结果与以前的研究结果平行，其中来自'Va. 45“，因此，在烤烟中将这些不利特性与TMV抗性分离可能是固有的困难。应该探索可能抵消这些不利关联的育种技术，或者尝试新的片段替换。
Isogenic or near isogenic lines of flue-cured tobacco [Nicotiana tabacum] were produced containing the N. glutinosa type of mosaic resistance from ''Burley 21''. The mosaic resistance factor was transferred into 6 cultivars of flue-cured tobacco by the backcross method. From each backcross family 2 resistant selections and 1 sister susceptible selection were compared with their recurrent parent for agronomic and chemical characteristics. The mosaic resistance factor was associated with reduced yield and off-quality characteristics. These results parallel those of previous study in which resistance from ''Va. 45'' was used, so that it may be inherently difficult to disassociate these adverse characteristics from TMV resistance in flue-cured tobacco. Breeding techniques that might offset these unfavorable associations should be explored, or a new segmental substitution attempted.