The Discovery of Natural Dwarf Mutant of Pyrus and the Evaluation of the Main Characters
Dwarf mutant type was discovered during the investigation of wild pear resources in the Yimeng Mountain Area, and the mutant shoots were grafted on adult trees in the experimental station of Qingdao Agricultural University in 2009.The botanical characteristics, biological habits and the heritable stability of dwarf property were observed.The results showed that the mutant tree was compact with very short internodes of shoots, and obviously different from the general Pyrus betulaefolia.Moreover, the dwarf property kept stable after transfer grafting for many times on the adult trees, and virology test showed no obvious abnormality.Besides internodes, the villi of shoots, fruit shape, leaf, etc were obvious difference as comparison with P.betulaefolia and P.calleryana, and preliminary could be confirmed as a natural dwarf mutant type of the genus Pyrus, and named as ‘PY-9’ on the basis of field investigation number.The discovery of this resource material, provided special genetic resources for the future research on the pear dwarf mechanism and dwarf rootstock breeding.
NETL
NSTL
万方数据
维普
