Floral biology and compatibility studies in dendrobium
| dc.contributor.advisor | Sadhankumar, P G | |
| dc.contributor.author | Susan, Varghese | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2018-12-07T10:20:30Z | |
| dc.date.available | 2018-12-07T10:20:30Z | |
| dc.date.issued | 1995 | |
| dc.description.abstract | The investigation on ‘Floral biology and compatibility studies in Dendrobium’ was carried out in the Department of Pomology and Floriculture, College of Horticulture, Vellanikkara, during the years 1993 to 1995. Dendrobium hybrids selected for the study included New Pink, Hieng Beauty, Emma White, Sonia 28 Mutant B, Kasem White, (Kiomi Beauty x Banyat Pink), (Hawaiian Beauty x Kasem Pink), Sonia, Sonia # 28 and White Nern. The flowers presented an array of colours, ranging from creamy white to deep purple and with a beautiful blend of the two. Anthesis occurred between 8.30 am and 5.30 pm with peaks between 9.00 and 10.00 am and also 3.00 and 4.00 pm. Maximum stigma receptivity was observed between four to six days after anthesis. Pollen grains were found agglutinated in masses called pollinia. The pollen output per pollinia ranged from 38,282 to 1,93,750 and the fertility percentage varied between 4.42 and 73.98 among the different hybrids. Best pollen germination was obtained in a medium comprising two per cent sucrose and one per cent agar. The medium supplemented with 75 ppm boric acid was the best for pollen tube elongation. Pollen viability was retained for the longest period when stored at 40 C. High rate of self and cross incompatibility is encountered in Dendrobium. Hybrids New Pink, Emma White and (Kiomi Beauty x Banyat Pink) were self compatible. From hybridization studies it was evident that Hieng Beauty, Emma White and White nern were best suited as female parents while, New Pink and (Hawaiian Beauty x Kasem Pink) were better male parents. The hybrids Kasem White and (Kiomi Beauty x Banyat Pink) were suitable as both male and female parents. In the compatible crosses ovary swelled and developed into a pod. It matured in 85-110 days after pollination. Their germination frequency and the subsequent morphogenetic changes leading to seedling development was influenced by the hybrids involved, maturity of the pod and media used. Seedlings showed the best response in ½ MS medium supplemented with 2 ppm NAA, 2 ppm 2, 4-D, 5 ppm BA and 1 g peptone. Planting out of mature well developed seedlings (270 days after in vitro planting) in coconut husk pieces was found to be for ex vitro establishment. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810085357 | |
| dc.keywords | Pomology and Floriculture | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Department of Pomology and Floriculture, College of Horticulture, Vellanikkara | en_US |
| dc.sub | Horticulture | en_US |
| dc.subject | null | en_US |
| dc.theme | Floral Biology | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Floral biology and compatibility studies in dendrobium | en_US |
| dc.type | Thesis | en_US |