Genetic Regulation of Phase Change in Maize

在其生长过程中，玉米芽通过不同的生长方式进行生长。 营养生长的幼年和成年阶段，然后进入 生殖阶段 以前的工作表明，这三个 阶段是由独立的，但相互作用的发展 程序. 这些方案之间的协调程度将 通过研究“早开花”基因对 阶段特异性营养性状，并通过检查相互作用 这些基因和几个突变之间的联系 组成型表达的幼年营养程序（Tp 1，Tp 2 TP 3）。 为了获得更完整的遗传图谱， 相变的调节，最近发现的几种突变 影响阶段特异性营养性状表达的基因 在细胞和分子水平上进行表征。 其他基因 将通过筛选 Tp2的抑制子，并通过筛选导致Tp2的突变， 成虫营养性状的早熟表达。 最后，G115， 一种调节几种青少年特征的基因，将被克隆， 转座子标记

During its growth the maize shoot progresses through distinct juvenile and adult phases of vegetative growth and then enters a reproductive phase. Previous work has suggested that these three phases are regulated by independent, but interacting developmental programs. The extent of coordination between these programs will be tested by studying the effect of "early flowering" genes on phase-specific vegetative traits, and by examining the interaction between these genes and several mutations that cause the constitutive expression of a juvenile vegetative program (Tp1, Tp2 and Tp3). To obtain a more complete picture of the genetic regulation of phase change, several recently identified mutations that affect the expression of phase specific vegetative traits will be characterized at a cellular and molecular level. Other genes that regulate phase change will be identified by screening for suppressors of Tp2, and by screening for mutations that cause the precocious expression of adult vegetative traits. Finally, g115, a gene that regulates several juvenile traits, will be cloned by transposon-tagging.