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《Acta Horticulturae Sinica》 1983-01
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STUDIES ON CHROMOSOME NUMBER OF SOME WILD SPECIES AND CULTIVARS OF PYRUS IN CHINA

Chen Ruiyang Li Xiulan Tong Deyao Liu Yuxin Wu Qiuqin Wang Fengshan (Department of Biology, Nankai University, Tianjin) Pu Fushen Huang Lisen ( Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng, Liaoning )  
The present study included six wild species and sixteen cultivars belonging to five species of Pyrus. They are: Wild species- P. ussuriensis Maxim., P. xerophila Yu, P. armeniacaefolia Yu, P. betulaefolia Bge. P. calleryana Dcne., P. pashia Buch-Ham. Cultivars -Ya-li, Qin-bei-li (P. bretschneideri) An-li (P. ussuriensis), Ma-koo-li, Cang-chi-li, Dong-da-li (P. pyrifolia) Langzhou Chang-ba (P. sinkiangensis) Bartlett, Flemish Beauty, Malgerzatka (P. communis) Hybrids - Jin-feng (P. bretschneideri × P. bretschneideri) Zao-su (P. bretschneideri × P. communis) Wu-jiu-xiang (P. bretschneideri × P. communis) Zao-xiang No. 2 (P. ussuriensis × P.pyrifolia) Jin-xiang (P. communis × P. ussuriensis) 52-4-2 (P. ussuriensis × P. communis) It was found that P. armeniacaefolia and'An-li', a cultivar of P. ussuriensis are triploids, while the others are all diploids.
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