| Characterization of drought resistance in transgenic wheat lines and grey correlation analyses of related traits |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.008 |
| Key Words: wheat ABP9 gene drought resistance parameters subordinate function coefficients grey correlative analysis |
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| Abstract: |
| A total of 11 traits, including 7 agronomic traits and 4 biochemical traits, was measured in nine ABP9-transgenic spring wheat lines and their donor parent Ningchun 4 that were grown in rain-fed (drought stress) and well-watered environments. Drought resistance capabilities of these materials were evaluated comprehensively by employing the methods of subordinate function and drought-resistance measure value (D value). Correlation degrees between these traits and drought resistance indexes were analyzed and evaluated using grey relational grade analysis method. The results showed that the drought resistance of the 6 transgenic wheat lines was better than that of their donor parent Ningchun 4. In particular, 3 lines even exhibited stronger drought resistance than a non-transgenic spring wheat cultivar Dingxi 35, which was commonly used as a control for testing drought resistance of drought-land spring wheat in the northwest China. Results of grey relational grade analyses indicated that the correlation degrees between these traits and drought resistance indexes were ranked from high to low in the following order: plant height, single spike weight, spike length, SOD activity, number of kernel per spike, effective tillers, POD activity, 1000-kernel weight, proline content, and then MDA content. |
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