رسالة جامعية
Development of intermonoploid somatic hybrids of potato and their molecular analysis based on polymorphism for retroelement Tst1
| العنوان: | Development of intermonoploid somatic hybrids of potato and their molecular analysis based on polymorphism for retroelement Tst1 |
|---|---|
| المؤلفون: | Lightbourn, Gordon James |
| المساهمون: | Horticulture, Veilleux, Richard E., Welbaum, Gregory E., Nowak, Jerzy, Saghai-Maroof, Mohammad A., Winkel, Brenda S. J. |
| بيانات النشر: | Virginia Tech |
| سنة النشر: | 2004 |
| المجموعة: | VTechWorks (VirginiaTech) |
| مصطلحات موضوعية: | retrotransposon, S-SAP, AFLP, IRAP, Solanum phureja, Solanum tuberosum, monoploid, protoplast fusion |
| الوصف: | Inbred lines for hybrid crop production have been a mainstay of plant breeding. Biotechnological approaches to hasten the process are available including anther culture to halve the genome and protoplast fusion to create hybrids between incompatible partners. We applied these techniques to potato to evaluate their potential for breeding highly heterozygous, cross-pollinating species. Four families of monoploids (2n=1x=12), developed from diploid hybrids with diverse genomic constitutions but heavily favoring Solanum phureja, a primitive cultivated potato, were used in electrofusion experiments to create intermonoploid somatic hybrids (SH). The "monoploid sieve" results in the survival of only those gametes free of lethal and deleterious genes but generates sterile sporophytes, necessitating protoplast fusion for SH development. From six intermonoploid electrofusion combinations, 276 plants were regenerated over 6-9 months. Fusion conditions were optimized. Ploidy was determined by flow-cytometry and SH confirmed by microsatellite analysis. Field evaluations over three years revealed that intermonoploid SH were inferior to cultivars. Dihaploids derived by anther culture of a tetraploid intermonoploid SH were reduced in vigor with an increase in homozygosity, while 2x X 2x sexually derived populations had better yield than the SH, suggesting that producing SH introduced or eliminated factors required for productivity. Molecular analysis of the SH was conducted to examine genomic stability through protoplast isolation and plant regeneration. Sequence specific amplified polymorphism (S-SAP) represents a hybrid system incorporating amplified fragment length polymorphism (AFLP) technology in conjunction with the use of a defined genomic sequence, e.g., retrotransposon display (RD) when the defined sequence is anchored into a consensus sequence of a retrotransposon such as the long terminal repeat (LTR) sequence of Tst1. Parental monoploids, SH and various Solanaceae were evaluated by RD. Fluorescently-labeled ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | LightbournThesis.pdf; etd-08272004-164824; http://hdl.handle.net/10919/28810Test; http://scholar.lib.vt.edu/theses/available/etd-08272004-164824Test/ |
| الإتاحة: | http://hdl.handle.net/10919/28810Test http://scholar.lib.vt.edu/theses/available/etd-08272004-164824Test/ |
| حقوق: | In Copyright ; http://rightsstatements.org/vocab/InC/1.0Test/ |
| رقم الانضمام: | edsbas.39FEE202 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |