Embryogenic response of potato anther culture to colchicine
Colchicine, an antimicrotubule agent, has enhanced the androgenic response of cruciferous and graminaceous species. Our objectives were to determine if colchicine treatments enhanced androgenic embryo production in diploid potato, and if colchicine treatments during anther culture affected the ploid...
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ndltd-VTETD-oai-vtechworks.lib.vt.edu-10919-444962021-06-22T05:29:16Z Embryogenic response of potato anther culture to colchicine Teparkum, Sirasak Horticulture anther culture monoploids colchicine RAPD markers LD5655.V855 1996.T4447 Colchicine, an antimicrotubule agent, has enhanced the androgenic response of cruciferous and graminaceous species. Our objectives were to determine if colchicine treatments enhanced androgenic embryo production in diploid potato, and if colchicine treatments during anther culture affected the ploidy of anther-derived plants. An additional study, analysis of genetic identity among regenerated anther-derived plants based on RAPD markers, was also conducted. Anther culture of a hybrid between <i>Solanum chacoense</i> and <i>S. phureja</i> (clone CP2) was conducted with five colchicine treatments (0, 25, 50, 100, and 200 mg/L) for 24 h. Anthers containing late uninucleate pollen were cultured on modified liquid LS medium. A mean of 0.25 embryos per anther was obtained; however, there was no significant difference among the colchicine treatments, which ranged from a mean of 0.17 to 0.28 embryos per anther for 200 mg/L colchicine and control, respectively. In total 56 plants were regenerated of which 11% were monoploid. The second experiment using the same colchicine treatments was conducted with 54 hybrids derived by crossing six anther-derived doubled monoploids with three heterozygous pollinators. A mean of 1.78 embryos per anther was obtained; again, there was no significant difference among the colchicine treatments, which ranged from 1.27 to 2.75 for 50 mg/L colchicine and control, respectively. In total 679 plants were regenerated. The 312 plantlets for which ploidy was determined, 75% were monoploid. The third experiment was conducted to study various durations (0, 90 sec vacuum infiltration, 24, 48, and 72 h) of high colchicine treatment (200 mg/L) applied to <i>S. phureja</i> family DM 13-14 202 x ID 5. There was nearly significant difference among treatments (α = 0.05). Mean embryos per anther ranged from 0.96 to 1.90 for 48 h and 90 sec vacuum infiltration, respectively. In an additional study, 26 regenerated anther-derived monoploid plants, from the DM 13-14 202 x ID 5 family, from the second experiment, were genetically characterized based on RAPD markers. Forty-three loci were scored from 13 primers for groups of monoploids derived from the same flasks of anther culture. From one flask, two pairs of monoploids were found to be genetically identical. From a second flask 6 of 7 were genetically identical, and from a third 3 of 7 were genetically identical. The presence of genetically identical individuals within three monoploid populations indicates the prevalence of secondary embryogenesis during anther culture such that a single embryogenic microspore can generate many anther-derived plants. Master of Science 2014-03-14T21:44:02Z 2014-03-14T21:44:02Z 1996 2008-08-29 2008-08-29 2008-08-29 Thesis Text etd-08292008-063430 http://hdl.handle.net/10919/44496 http://scholar.lib.vt.edu/theses/available/etd-08292008-063430/ en OCLC# 36516419 LD5655.V855_1996.T4447.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ x, 76 leaves BTD application/pdf application/pdf Virginia Tech |
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anther culture monoploids colchicine RAPD markers LD5655.V855 1996.T4447 Teparkum, Sirasak Embryogenic response of potato anther culture to colchicine |
description |
Colchicine, an antimicrotubule agent, has enhanced the androgenic response of cruciferous and graminaceous species. Our objectives were to determine if colchicine treatments enhanced androgenic embryo production in diploid potato, and if colchicine treatments during anther culture affected the ploidy of anther-derived plants. An additional study, analysis of genetic identity among regenerated anther-derived plants based on RAPD markers, was also conducted.
Anther culture of a hybrid between <i>Solanum chacoense</i> and <i>S. phureja</i> (clone CP2) was conducted with five colchicine treatments (0, 25, 50, 100, and 200 mg/L) for 24 h. Anthers containing late uninucleate pollen were cultured on modified liquid LS medium. A mean of 0.25 embryos per anther was obtained; however, there was no significant difference among the colchicine treatments, which ranged from a mean of 0.17 to 0.28 embryos per anther for 200 mg/L colchicine and control, respectively. In total 56 plants were regenerated of which 11% were monoploid.
The second experiment using the same colchicine treatments was conducted with 54 hybrids derived by crossing six anther-derived doubled monoploids with three heterozygous pollinators. A mean of 1.78 embryos per anther was obtained; again, there was no significant difference among the colchicine treatments, which ranged from 1.27 to 2.75 for 50 mg/L colchicine and control, respectively. In total 679 plants were regenerated. The 312 plantlets for which ploidy was determined, 75% were monoploid.
The third experiment was conducted to study various durations (0, 90 sec vacuum infiltration, 24, 48, and 72 h) of high colchicine treatment (200 mg/L) applied to <i>S. phureja</i> family DM 13-14 202 x ID 5. There was nearly significant difference among treatments (α = 0.05). Mean embryos per anther ranged from 0.96 to 1.90 for 48 h and 90 sec vacuum infiltration, respectively.
In an additional study, 26 regenerated anther-derived monoploid plants, from the DM 13-14 202 x ID 5 family, from the second experiment, were genetically characterized based on RAPD markers. Forty-three loci were scored from 13 primers for groups of monoploids derived from the same flasks of anther culture. From one flask, two pairs of monoploids were found to be genetically identical. From a second flask 6 of 7 were genetically identical, and from a third 3 of 7 were genetically identical. The presence of genetically identical individuals within three monoploid populations indicates the prevalence of secondary embryogenesis during anther culture such that a single embryogenic microspore can generate many anther-derived plants. === Master of Science |
author2 |
Horticulture |
author_facet |
Horticulture Teparkum, Sirasak |
author |
Teparkum, Sirasak |
author_sort |
Teparkum, Sirasak |
title |
Embryogenic response of potato anther culture to colchicine |
title_short |
Embryogenic response of potato anther culture to colchicine |
title_full |
Embryogenic response of potato anther culture to colchicine |
title_fullStr |
Embryogenic response of potato anther culture to colchicine |
title_full_unstemmed |
Embryogenic response of potato anther culture to colchicine |
title_sort |
embryogenic response of potato anther culture to colchicine |
publisher |
Virginia Tech |
publishDate |
2014 |
url |
http://hdl.handle.net/10919/44496 http://scholar.lib.vt.edu/theses/available/etd-08292008-063430/ |
work_keys_str_mv |
AT teparkumsirasak embryogenicresponseofpotatoantherculturetocolchicine |
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1719411931752693760 |