烟属野生种主要植物学性状及黑胫病抗性评价

鉴定了烟属植物野生种生育期等植物学性状特性,评价了供试材料对黑胫病(0号及1号生理小种)的抗性,为开展远缘杂交花期相遇及亲本选配提供了基础数据。在玻璃温室内,本研究针对66份烟属植物野生种的生育期等7个植物学性状的调查,检测了烟碱及钾含量,并对黑胫病(0号及1号生理小种)抗性进行了评价。结果表明:供试材料播种到开花时间(DF)为35.00~357.00 d,平均121.67 d;种子千粒重(TSW)为0.02~0.20 g,平均0.09 g;株高(PH)为11.20~292.75 cm,平均119.19 cm;花冠长度(CL)为1.22~11.50 cm,平均3.98 cm;花冠直径(CD)0.67~7.80 cm,平均2.37 cm;最大叶长(MLL)为6.79~61.15 cm,平均25.17 cm;最大叶宽(MLW)为0.65~35.51 cm,平均11.84 cm。烟碱含量为0.03%~1.81%,平均0.34%;钾含量为0.32%~7.11%,平均3.56%。筛选到N.alata PI42334等11份资源同时抗黑胫病0及1号生理小种。

Analysis on Morphological Characterizations and Black Shank Disease Resistance for Genus Nicotiana

The morphological variation of 66 Nicotiara accessions from 50 species were assessed based on 7 morphological traits.The leaf nicotine and potassium concentration of fresh tobacco leaf by kill-enzyme torrefaction method were measured.The evaluation of the accessions for their resistance to Phytophthora parasitica var.nicotianae (race 0 and race1) was conducted.The results showed that the days from sowing to flower (DF) were observed from 35.00 to 357.00 d with an average of 121.67 d.The 1000-seed weight (TSW) varied from 0.02 to 0.20 g with an average of 0.09 g.The plant height (PH) ranged from 11.20 to 292.75 cm with an average of 119.19 cm.The corolla length (CL) ranged from 1.22 to 11.50 cm with an average of 3.98 cm.The corolla diameter (CD) varied from 0.67 to 7.80 cm with an average of 2.37 cm.The maximum leave length (MLL) varied from 6.79 to 61.15 cm with an average of 25.17 cm,while the maximum leave width (MLW) varied from 0.65 to 35.51 cm with an average of 11.84cm.The leaf nicotine concentration was measured from 0.03％ to 1.81％ with an average of 0.92％,potassium concentration measured from 0.32％ to 7.11％ with an average of 3.56％.Eleven wild tobacco accessions were resistant to black shank race 0 and race 1 after black shank disease inoculation.This work provided an important contribution to help breeders in the future on the direction of interspecific crossing attempts.