The analyses of these three types of data in the hybrid and its parents could provide new information on genomic composition and evolutionary mechanisms of the hybrid . the main results are the followings : 1 . rdna fish chromosomal localization of 18s and 5s rdna was carried out for two soft pines ( subgenus strobus ) and five hard pines ( subgenus pinus ) using fish Rdna荧光原位杂交( fish )通过对华山松和白皮松两种单维管束亚属植物及油松、云南松、高山松、马尾松和南亚松等五种双维管束亚属植物的18srdna与5srdna的荧光原位杂交，结果表明： ( 1 )裸子植物的18srdna位点数目明显多于二倍体被子植物。
1 ) and the national important wild conservative plants list ( list 1 ) , there are 191 species of 152 genera in 83 families of the rare and endangered plants in yunnan province . among them , there are 17 species of 13 genera in 13 families of pteridophyta ; 24 species of 15 genera in 7 families of gymnosperm ; 150 species of 124 genera in 63 families of angiosperm 依据《中国植物红皮书》 (第一册)和《国家重点保护野生植物名录(第一批) 》两部出版物，分布于云南省范围内的珍稀濒危植物共计83科152属191种(不重复统计) ，其中，蕨类植物13科13属17种，裸子植物7科15属24种，被子植物63科124属150种。
The abundance of flowering plants and ferns is increased exponentially along it , and that of conifers change a little under low heat and water conditions , while the abundance of conifers increased exponentially along the axis under high heat and water conditions . dcca and cca showed the similar results as that of dca 被子植物与蕨类植物丰富度在dca第一轴上具有一致的排序特征，即呈现对数增长模型，而裸子植物丰富度的变化随水热条件的增加而改变的很小，但到高热量、高水分条件下，丰富度迅速的增加，呈幂指数增长趋势。
In gmnr , so far a total of 1030 vascular species in 536 genera of 169 families have been listed , 141families , 486 genera , 949 species ( including intermination taxa , similarity hereinafter ) of the spermatophyta , including 4 families , 4 genera , and 7 species of the gymnospermae , and 137 families , 482 genera , 942 species of the angiospermae - - - - - - the dicotyledonae 117 families , 374 genera , 755species , and the monocotyledonae 20 families , 108 genera , 187 species 本文是对广东省古兜山自然保护区种子植物区系的组成与基本特点的研究，现知古兜山共有野生维管植物169科536属1030种(蕨类植物28科50属81种，裸子植物4科4属7种，双子叶植物117科374属755种，单子叶植物20科108属187种) ，具有部分古老孓遗种，以木本植物为主，其次为草本，藤本不多。
The paper summarizes research advances about the developments of somatic embryos in several conifers , which have appeared at home and abroad in recent years , mainly in the effects of medium components in tissue culture and aba on the development of somatic embryos , and cytology , programmed cell death , genes and protein composition related to the development of somatic embryos , and further discusses the developmental mechanisms of somatic embryos and the role of somatic embryos in genetic transformation system 本文综述了近年来国内外有关裸子植物中几种松杉类植物体细胞胚发育过程的研究报道，其中主要涉及培养基成分和脱落酸( aba )对体细胞胚发育的影响，以及体细胞胚发育在细胞学、细胞程序性死亡、相关基因和蛋白质组学等方面的研究进展，并进一步讨论了松杉类植物体细胞胚的发育机理，以及体细胞胚在遗传转化系统中的作用。
Although results from issr and rapd analysis showed that the genetic diversity of wc and tm was higher than others " , there was no significant difference from among the populations tm , wc , dh and sx . . of all the populations the level of genetic diversity of tx was the lowest Issr与rapd两种分析手段，尤其是issr分析所得的各项遗传多样性参数值与其他一些裸子植物的rapd数据资料进行比较显示，银杏的遗传多样性处于较高水平。其中， wc群体和tm群体的遗传多样性水平较高。
