Identification and Evaluation of Sensitivity to Exogenous Calcium in Different Genotypes of Chinese Cabbage
WANG Li-li1，LUAN Zhao-shui2，XU Kun1，CAO Bi-l i 1*
1College of Horticulture Science and Engineering，Shandong Agricultural University，Shandong Collaborative Innovation
Center of Fruit ＆ Vegetable Quality and Efficient Production，Key Laboratory of Biology and Genetic Improvement of
Horticultural Crops in Huang-Huai Region，Ministry of Agriculture，Taian 271018，Shandong，China；2Degao Vegetable
Seed and Seedling Institute，Dezhou Vegetable Breeding and Engineering Technology Research Center，Dezhou 253000，
Shandong，China
In order to probe convenient indexes for identifying Chinese cabbage〔Brassica campestris L. ssp. pekinensis（Lour）Olsson〕calcium sensibility，this paper took 20 varieties of Chinese cabbage as test
material，and studied the effects of different calcium levels on leaf tip burn index at different growth stages of
Chinese cabbage and plant growth，leaf chlorophyll content，leaf calcium content．The results showed that there
were bigger differences in the leaf tip burn indexes among Chinese cabbage of different genotypes．Generally，the
leaf tip burn index decreased obviously with the increase of calcium levels．While，it increased with the extension
of growth period under the same calcium level．Clustering analysis indicated that Chinese Cabbage leaf tip burn
index of seedling stage at the calcium level 0 mmol·L-1 was consistent with that of rosette and knot stage at
calcium level 0.5 mmol·L-1．The leaf tip burn index regression model established by regression analysis indicated
that only the relative fresh weight and relative leaf chlorophyll content of plants treated at the seedling stage with
calcium levels of 0.5 mmol·L-1 and 4.0 mmol·L-1 were selected．Results of clustering analysis using the selected
variables as parameters were consistent with those of the leaf tip burn index of seedling stage by clustering analysis．
Both clusters could classify Chinese cabbages into 3 categories：calcium sensitive，dullness，and intermediate
type．All these data suggested that the relative fresh weight and relative leaf chlorophyll content of plants treated
with calcium levels of 0.5 mmol·L-1 and 4.0 mmol·L-1 at the seedling stage could be used as convenient criteria
to identify calcium resistant Chinese cabbage varieties．
王莉莉，栾兆水，徐坤，曹逼力. 不同基因型大白菜对外源钙敏感性鉴定评价[J]. 中国蔬菜, 2018, 1(7): 30-35.
WANG Li-li，LUAN Zhao-shui，XU Kun，CAO Bi-li. Identification and Evaluation of Sensitivity to Exogenous Calcium in Different Genotypes of Chinese Cabbage. China Vegetables, 2018, 1(7): 30-35.
