Identification Of Aegilops Ventricoas-Aegilops Cylindrica Amphiploid SDAU18 And Cytogenetical Study On Progenies From SDAU18×Wheat

Agronomic traits investigation ,cytologic characteristics observation have been carried out in Aegilops ventricoas (DDMVMV)-Aegilops cylindrica (CCDD) amphiploid SDAU18 ,its parents Aegilops ventricoas and Aegilops cylindrical ,Wheat of Yannong15(AABBDD),Progenies from SDAU18×Yan-nong15 and hybrids F1 of SDAU18 and its two parents. Meanwhile,A-PAGE and SDS-PAGE were used to characterize the HMW-Glutenin and Gliadin of SDAU18 and its two parents. The main results are showed as follows:1. An amphiploid (SDAU18) was artificially synthesized by crossing Ae.Ventricoas and Ae.cylindrica , the identification on cytologic characteristics of SDAU18 and its parents (Aegilops Ventricoas and Aegilops cylindrica) was carried out. The results show that the chromosome configurations of Aegilops Ventricoas and Aegilops Cylindrica at PMC MⅠare both 14Ⅱ,and that of SDAU18 at PMC MⅠi s basically 28Ⅱ, the number of RTC chromosomes is 56. Thereby, SDAU18,which was basically and cytologically stable,can be judged as a full amphiloid of Ae.ventricoas and Ae.cylindrica by the cytologic analysis.2. The results of agronomic traits investigation showed that SDAU18 are better in many characters than its parents, such as, plant height, ear length, number and size of fiowerets per ear ,seed weight, number of seeds per ear and affinity to wheat,and so on. In addition, it is immune to powdery mildew and stripe rust just as its parents. Further more ,it is very easy to cross with wheat for almost same anthesis to wheat .To sum up,SDAU18 is very valuable in the area of wheat breeding and genetics.3. The microsporogenesis and the pollen development of Amphiploid...