| The comparative study on drought resistance index of rape with different drought resistance in germination |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2012.05.15 |
| Key Words: rape germination drought resistance evaluation index |
| Author Name | Affiliation | | YUAN Xiaoyan | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China | | FU Minglian | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China | | HE Xingying | Tropical and Subtropical Cash Crops Institute,Yunnan Academy of Agricultural Sciences, Baoshan, Yunnan 678025, China |
|
| Hits: 206 |
| Download times: 146 |
| Abstract: |
| For studying the drought resistance index of rape in germination, this paper investigated the germination of rape varieties with different drought resistance under PEG-6000 stress condition with the concentration ranging form 8% to 25%. The change rule of three indexes, i.e. relative germination rate, root length, bud length, and its correlation with drought resistance were statistically analyzed. The results showed that in 19% concentration of PEG-6000, the relative germination percentage of different materials averaged at 60.6% with a coefficient of variation 51% and the relative germination of the strong drought resistance materials exceeded 90% .The relative root length averaged at 57.3% with a coefficient of variation 17.9%, and the relative root length of the strong drought resistance materials exceeded 70%. The correlation coefficient between relative germination percentage, root length and the drought resistance of rape in sprouting period were larger than 0.9. The relative germination percentage of seeds and the relative root length were the reliable indexes for idenfication of drought resistance of rape in sprouting period . The materials could be preliminary identified as strong drought resistance, if whose relative germination was over 90% and relative root length was over 70% under the 19% concentration of PEG-6000. |
|
|
|