ISHS Acta Horticulturae 402: International Symposium on Cultivar Improvement of Horticultural Crops. Part 1: Vegetable Crops
A STUDY ON INHERITANCE AND CIRRELATION OF FRUIT FIRMNESS IN TOMATO |
| Authors: | W. Fu, L. Jingfu, L. Guiying |
| Keywords: | Tomato, fruit firmness, inheritance and correlation |
| Abstract:
The inheritance of the fruit firmness was studied and the relationship between the fruit firmness and other properties was analuzed by using a complete diallel cross [Griffing's ½p(p-1)with six tomato varieties. The results indicated that tomato fruit firmness was a quantitive character and the inheritance accorded with the additive and dominant models (m=503.34,d=83.75,h=40.57). The additive component was predominate and the firmness values of the bybrid lay between their parents. There was a hererosis in the hybirds. High firmness showed an incomplete dominance, h2B(%)=60.60,h2N(%)=45.03. the results suggested that crossbreeding as a major method and hterosis as a supplementary means should ve adopted in breeding for improving fruit firmness of tomato, and selection ought to be carried out in earlier generations during crossbreeding. The frit firmness was correlated to different extent with fruit weight, tolerance to compression, solute solid content, index of fruit shape and resostance to cracking. Improvement in fruit firmness may lead to higher tolerance to compression and resistance to cracking. Fruit firmness might be improved by increasing IFS and reducing fruit weight, but solute solid content was also decreassed. 8711–209 was shown eo be a very good breeding material foe inproving the fruit firmness. | |
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