ISHS Acta Horticulturae 637: XXVI International Horticultural Congress: Advances in Vegetable Breeding
SCREENING METHOD FOR RESISTANCE TO TIPBURN IN CHINESE CABBAGE |
| Authors: | Y.J. Yu, X.Y. Zhao, J.B. Xu |
| Keywords: | Brassica campestris, calcium deficiency |
| Abstract:
Three Chinese cabbage (Brassica campestris L. ssp. pekinensis) cultivars and one breeding line were evaluated for resistance to tipburn at the seedling stage of growth when grown in perlite and watered with standard and modified Hoagland solution. Tipburn was induced using Hoagland solution without calcium and with high-level nitrogen. Symptoms developed quickly and became more serious with increased ammonium nitrate in the absence of calcium. Furthermore, tipburn occurred earlier in solutions short of both calcium and trace elements, in which the seedlings were dwarfish and yellow. The calcium content of young leaves in the calcium deficient treatment was 0.157% of dry leaf weight, which was 8.3% that of the check. ‘Jing Spring King’ was resistant, and breeding line 99-481 was highly susceptible to tipburn. The results of the seedling test were consistent with field results. | |
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