Chen Qingxiang Wang Zhaomu Sun Weilin Du Wei WangYangfei
1991, 11(1).
Abstract:大量的细胞学观察表明,昭苏野生油菜与黑芥之间,不论是在染色体数上,还是在染色体组型、带型以及染色体大小、总长上都有较大的差异。昭苏野生油菜的染色体数为2n=18,芥黑则为2n=16;染色体组型,前者为14m+4m(SAT),后者为8m+4sm+4sm(SAT);染色体带型,前者为12C/C+2CN/C+2WN~O/O+2W/O,后者为12C/C+2WN/C+2WN~O/C;染色体长度前者为2.00—4.00μ,后者为6.48—3.75μ,虽然黑芥染色体条数少于野生油菜,但总长度却长于昭苏野生油菜。通过观察测量和分析比较,我们认为,昭苏野生油菜与黑芥在亲缘关系上有着较大的距离,二者为不同的物种。
1991, 11(1).
Abstract:The preseat paper is a rupert on conbined micromorphological and taxonomical studies of the genus Polygonum.It is designed as a primary probe into the micronorphological and taxonomical variability within and betwreen the different sections and species of
Liu Cuiyun Li Zhang Wei Xiaoping He Yizhe Yan Zhenglu
1991, 11(1).
Abstract:以小麦为母本与大麦杂交,通过幼胚培养,获得小大麦属间杂种。杂种自交不育。以中国春和昌农82小麦的混合花粉给杂种授粉,得到回交一代(BC_1F_1),结实率为4.35％。以78380—1和密穗早小麦的混合花粉及小偃107分别与 BC_1F_1回交,获得回交二代(BC_2F_1),结实率为45.45％和31.25％。F_1体细胞染色体数为非整倍体,其变幅从18到27条之间,以2n=2l条较多。花粉母细胞减数分裂中期Ⅰ单价体细胞为37.0％,1—4个不等二价体细胞为63.0％。F_1形态类似普通小麦。回交后代表型多为亲本中间型,也有少数超亲现象。在BC_2F_4代中,整倍体细胞(2n=42)占大多数(80.83％),染色体构型比较复杂,主要有21Ⅲ,20Ⅲ+2 Ⅰ和19Ⅲ十4 Ⅰ三种,以21Ⅲ的细胞较多(75.03％)。从分离后代中选育出单体(21Ⅲ+1 Ⅰ)和二体(22Ⅲ)异附加系及具突出性状的新类型。
Salvia chinesis CALLUS Zhang Kerong Ge Li Chu Xiaohong Ni Dexiang Lu Meiwei Sun Hongqiao
1991, 11(1).
Abstract:In this papper,the endogenous IAA and Zeatin were analysised by HPLC(high performance liquid chromatograph);Quantiative deter- minations of DNA,RNA and protein were made at the same time, It was found that ZT/IAA changed obviously,so did RNA/DNA and RNA.T
1991, 11(1).
Abstract:Water potential,osmotic potential,solute concentration and osmotic adjustment are determined in the leaves of three wheat cultivars(Din- gxi No.24 and Honglong No.1.cultivars known as drought resis- tance;Longchen No.1,non-resistance,as the control).The d
1991, 11(1).
Abstract:The Populus davidaina forests are representatire of secondary forest after climax forest communities destroyed in the Qinling Mountains and the Loess Plateau,its local temperature limited the upper border, so it can not be above mixed deciduous broadleaf
1991, 11(1).
Abstract:Based on vegetation structure remote sensing image analysis,it is the first more detailed reserch on the division of Xilin Gol steppe by using the method of cluster analysis,and also presented a divided plan and a map;described the main characters of all
