ISHS Acta Horticulturae 402: International Symposium on Cultivar Improvement of Horticultural Crops. Part 1: Vegetable Crops
INHERITANCE OF RESISTANCE TO WHITE LEAF SPOT IN CHINESE CABBAGE |
| Authors: | W. Yutang, Y. Liying, S. Longting, F. Hui, W. Shiquan |
| Keywords: | Chinese Cabage, White Leaf Spot, inheritance, disease resistance |
| Abstract:
Inheritance of resistance to White Leaf Spot in seedlings and abult plants of chinese cabbage was investigated by means of "4×4" diallel crosses. Results showed that the resistauce displayed a sign of quantitative hereditary characteristics, and was controlled by at least 4 pairs of genes with partial dominance. Based on the fact that back crossing effect was significant whereas reciprocal crossing effect was insignificant, the resistance was mainly controlled by nucleus genes. Both general combining ability and special combining ability were important in the resistance, which was suitable for the "additive-dominance" model. This meant that the additive effect was superior. Both the broad and narrow heretability of the resistance had great estimations. Disease resistance correlated significantly between parents and their offsprings. Results of seeding testing in the laboratory and adult plant testing in the field were similar. | |
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