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EFFECT OF GAMMA RADIATION ON GROWTH OF SOME POTATO CULTIVARS (Solanum tuberosum L.) PROPAGATED IN VITRO UNDER FIELD CONDITIONS | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 14, Issue 6, 2009, Pages 0-0 | ||
| Author | ||
| A. A. M. Al-Salihy | ||
| Abstract | ||
| This research aimed to study the effect of gamma rays on some growth characteristics of irradiated plants of four potato cultivars (Diamant, Desiree, Famosa, Marfona) under field conditions. The following parameters were investigated, plant height, fresh and dry weight, chlorophyll content in plant leaves and number of tubers production in plant. Results showed that gamma radiation has a significant effect on all characteristics studied. Plant height was significantly reduced at the dose of 40 Gray in comparison with the control, while the mean of plant height at the dose of 10 Gray is 58.05 cm which did not different in comparison with control. Furthermore Desiree cultivar was significantly different in this parameter in comparison with other cultivars. The result showed that the fresh weight was significantly increased with increasing doses except at dose of 40 Gray where it was 326 gm and it was 511 gm at dose 30 Gray. Results also showed increase in dry weight as the dose of gamma radiation increased except at dose 40 Gray while maximum dry weight of (104 gm) was found at the dose 30 Gray. The Desiree cultivar showed a significant increase in this parameter in comparison with other cultivars. Furthermore the radiation doses also affected the chlorophyll content of the leaves which increased with increasing the doses of gamma radiation, except at the dose 40 Gray which cause decline in this parameter. The effect of radiation doses on the mean number of tubers /plant were studied and the results showed that the dose 30 Gray gave the highest mean number of tubers/plant. Furthermore, Desiree cultivar gave the highest for this characteristic. Finally the radiation doses also affect the average diameter of the tubers and its weight, Diamant cultivar showed the highest for these two characters. | ||
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