水稻nmads 1基因的序列测定与结构分析

用PCR对6个水稻基因组BAC克隆进行了筛选，得到了水稻nmads1基因2933bp的序列，通过与mmads1基因的cDNA序列比较，发现nmads1基因含6个内含子和6个外显子，5′非编码区有2个TATA盒及1个Car G类似序列。     

白菜型油菜核育性相关基因片段的克隆与序列分析

通过ＲＡＰＤ标记,所获得的与育性基因紧密连锁的基因片段进行克隆与序列分析,结果表明,该育性基因片段为与油菜小孢子发育早期ＢＰ４调控基因５８％同源,并含有一ＭＡＰＤＳ盒高度同源的保邓列。Ｓｏｕｔｈｅｒｎ杂交结果表明该基因为单拷贝基因。     

Functional characterization and mapping of two MADS box genes from peach (Prunus persica)

Previously an AGAMOUS gene homologue PpMADS4 and a FRUITFULL gene homologue PpMADS6 were isolated from peach (Prunus persica), and both genes were shown to express in the developing floral and fruits. To gain insight into their function, the two genes were constitutively expressed in Arabidopsis thaliana and their effects on plant growth and floral organ development were studied in this work. The transgenic plants all displayed early flowering and conversion of inflorescence to floral meristem. However, the two genes had different effects on the floral organ structures in A. thaliana. The transgenic plants overexpressing PpMADS4 displayed homeotic conversion of floral organs, and par- ticularly the perianth abscission was inhibited. The plants overexpressing PpMADS6 showed early flowering, produced higher number of carpels, petals, and stamens than nontransgenic plants, and pod shatter was prevented; significantly, the transgenic plants yielded more than one siliques from a single flower. A SSR molecular marker was developed for PpMADS4, and it was then assigned into the G5 linkage group of Prunus sp. Both PpMADS4 and PpMADS6 genes were located at the same region in the G5 linkage group. Our results showed the potential application of these two MADS box genes for crop and fruit tree improvement.     

水稻中一个与花发育相关的MADS-box基因的表达检测

根据MADS－box基因的保守区结构，设计简并性引物，利用RT－PCR从水稻（Oryza sativa L.)中克隆到一个新的水稻MADS－box基因cDNA睛段，将它命名为FDRMADS5．该基因核苷酸序列851bp,编码160个氨基酸，有典型的植物MADS－box基因的结构，FDRMADS5的Southern分析，表明它为单拷贝基因，用Northern检测了FDRMADS5的表达情况，发现该基因除了在花中有表达外，在水稻的根尖和幼苗端中也有微量的表达，这一结果表明，水稻的MADS－box基因功能可能并不局限于控制花的发育。