首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Chimeras for mutations induced in dormant tomato seeds
Authors:M Farrell
Institution:(1) Department of Horticulture, Purdue University, 47907-1165 West Lafayette, IN, USA
Abstract:Genetic chimeras of the VFNT cherry tomato line (Lycopersicon esculentum) were produced by mutagenizing seeds with ethyl methane sulfonate (EMS). The chimeras thereby produced were evaluated by progeny-testing the fruits of the genetically mosaic tissue. A total of 2011 M1 plants was grown from treated seeds and evaluated by screening their 95175 (M2) progeny for mutations affecting seedling phenotype. Three vigorous and fertile M1 plants bearing mutant progeny with definitive phenotypes were selected for systematic harvesting and analysis. The specific location of each fruit was noted at harvest time, enabling the mutated sporogenous tissue of the mosaic M1 plants to be traced. Sectoring appeared in both branch and floral tissues. In several cases, mutant progenies were restricted to individual branches or parts thereof. True-breeding recessive mutants whose monogenic mode of inheritance was later established occasionally segregated within M1 fruit progenies at frequencies that indicate a non-homogeneous floral meristem origin. The data emphasize the necessity of making a well-distributed harvest of mosaic plants in order to detect as many variants as possible, as mosaic sectors may or may not recur late in ontogeny and may not contribute to sporogenous tissue early in development.
Keywords:Genetic mosaicism  Chimeras  EMS Mutagenesis  Tomato mutants
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号