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| Identification Methods for Pakchoi〔Brassica campestris L. ssp. chinensis（L．）Makino var. communis Tsen et Lee〕Water-logging Tolerance |
| ZHANG Yong-ji1，2，XU Hai2，ZHANG Hui1，2，CHEN Long-zheng2，SONG Bo2，YUAN Xi-han2* |
| 1State Key Laboratory of Crop Genetics and Germplasm Enhancement，Nanjing Agricultural University，Nanjing 210095，Jiangsu，China|2Institute of Vegetable Crops，Jiangsu Academy of Agricultural Sciences，Nanjing 210014，Jiangsu，China |
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Abstract 8 pakchoi genotypes with different water-logging tolerance were selected and treated under 5 different temperature conditions for high humidity，when their seedling leaves were 6，aiming at studying the identification method for pakchoi water-logging tolerance．Finally the saturated soil moisture，95% of relative air humidity，30 ℃/20 ℃ of day 12 h/night 12 h treatment for seedlings of 6 days were determined as identification condition for differences of pakchoi water-logging tolerance．The chlorosis size and degree of chlorotic leaf blades were taken as the grading index for wet injury，and thus to identify the water-logging tolerance of the variety．
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Received: 12 September 2011
Published: 08 November 2011
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