ISHS Acta Horticulturae 588: II International Symposium on Cucurbits
DEVELOPMENT AND EXPLOITATION OF TROPICAL GYNOECIOUS LINES IN F1 HYBRID OF CUCUMBER |
| Author: | T.A. More |
| Keywords: | Cucumis sativus, stability, maintenance |
| Abstract:
At Indian Agricultural Research Institute, New Delhi, three tropical gynoecious cucumber (Cucumis sativus L.) lines namely 87-304 (GYC-1), 87-319 (GYC- 2) and 87-338 (GYC-3) were developed by More and Seshadri (1988). These lines were utilized to develop tropical gynoecious hybrids. Some of these hybrids viz., DCH 1 and DCH 2 were found to be promising for high productivity and fruit quality both under open field and greenhouse cultivation. Consumers of Maharashtra, Karnataka, Andhra Pradesh and Gujrat states prefer the cucumber fruits are having light yellow fruit skin colour typical to that of cv. Poona Khira. Importance of the parthenocarpy phenomenon in fruit set is well known. Therefore efforts were made to develop a new parthenocarpic tropical gynoecious line having yellow skin fruit colour. As the result a new tropical gynoecious parthenocarpic line PKG-1 (GYC-4) was developed from a complex cross [(Tablegreen 68 x SC 3) x Poona Khira] F3 x [(Gy-14 x Tablegreen 68) x Poona Khira] F3 by the author in 1998. From this complex cross two types of lines were developed. First set includes lines PKG-1-2, 1-11, 1-12 and 1-15 are having yellow skinned fruits, gyenoecy and parthenocarpy and second set comprised of PKG-1-21, 1-23 and 1-24 are having green fruit skin colour, gynoecy and parthenocarpy. When PKG-1 (GYC-4) along with GYC-1, GYC-2 and GYC-3 were subjected for heterosis and combining ability studies, it has shown great promise to exploit in heterosis breeding. Two hybrids viz., Phule Champa and Phule Prachi (having involved GYC-2 and GYC-4 as female parent respectively) showed great promise for yield potential and hence these are released for commercial cultivation in 2001. | |
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