种子活力的生理和遗传机理研究进展_孙群.pdf

2007,40(1):48-53 Scientia Agricultura Sinica 100094 Advances on Seed Vigor Physiological and Genetic Mechanisms SUN Qun, WANG Jian-hua, SUN Bao-qi (Department of Seed Science, College of Agriculture and Biotechnology, China Agricultural University, Beijing 100094) Abstract: Seed vigor is a more promising seed quality character reflecting potential seed germination, field emergence and seed storage ability under different conditions than standard germination. Standard germination is influenced by genetic background and environmental effects during seed development and storage conditions. Latest research on physiological mechanism in seed vigor showed that at the late stage of seed development, the development of seed vigor involves some stress-resistant substances including LEA protean, oligosaccharides and ABA. Whereas the loss of seed vigor, or seed aging and deterioration, could be attributed to lipid peroxidation, chromosome deform and genes aberrance, and embryo protein degradation etc. Seed vigor is a quantitative character controlled by multi-genes. Genetic and QTL analyses on seed vigor trait in model plants, such as Arabidopsis and rice, are mostly concentrated on related morphology traits, few physiological traits have been researched. It was concluded that all of the QTL genetic characteristics of seed vigor—including QTL quantities, its locus on chromosome, genetic effects, and interaction effects between genetic and environment –differed with plant species and used seed vigor traits. Key words: Seed vigor; Physiological and genetic mechanism; QTL analyses 1876 Nobbe 1 driving force20