Pollen-pistil interaction between eggplant (Solanum melongena L.) and the related wild species Solanum torvum SW.
| Autor: | Martin Jaiki, 賈馬丁 |
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| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 Eggplant (Solanum melongena L., 2n = 2x = 24), also known as aubergine or brinjal, is a member of the family Solanaceae and is an economically important vegetable crop in many countries. It is the third most important crop in the Solanaceae, after potato and tomato. Eggplant is highly susceptible to biotic and abiotic factors as the level of resistance to these factors are insufficient despite its wide genetic variability acquired through its wide habitat. The most important soil-borne diseases affecting eggplant are fungal wilts, bacterial wilts and root rot nematodes. Several related wild species’ are reliable sources of resistance to most pests and disease affecting eggplant. Therefore interspecies hybridization with its wild relatives is necessary in order to acquire pest and disease resistance and other desirable traits, as well as to widen its genetic variability. The wild species S. torvum (2n = 2x = 24) has been discovered to possess a high level of resistance to soil borne diseases and other biotic and abiotic factors affecting eggplant production. The objective of this study is to determine the crossability relationship between eggplant (Solanum melongena L.) and the related wild species Solanum torvum. It comprises two parts; a pollination and fertilization study, and a fruit set study. The pollination and fertilization study involved three genotypes; the eggplant (S. melongena) cultivars ‘Kaohsiung 2’ and ‘Early Beauty’, and the wild species S. torvum. The results revealed that there is an intimate pollen-pistil relationship when the S. melongena cultivars were used as the female partners resulting in the occurrence of fertilization 2-3 days after pollination. However, the results of the reciprocal pollinations revealed the existence of a prezygotic stylar barrier. In the fruit set study, six eggplant cultivars were crossed reciprocally with S. torvum. The results indicated that post zygotic barriers exist between the two Solanum species. The results therefore showed that unilateral incongruity exists between eggplant (S. melongena) and the wild species S. torvum. Using S. melongena as the female partner and S. torvum as the male partner will increase the chances of successful interspecific hybridization between the two species. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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