the present research was conducted to determine the percent self-incompatibility in some asian pear (pyrus serotina rehd.) as well in european pear (pyrus communis l.) cultivars. the experiment was carried out during 2006 and 2007 growing seasons. pollen grains were collected and tested for viability using in-vitro pollen culture. for microscopic examination of pollen tube growth in the style, ...

the collapse of the soviet :union: provided an extraordinary opportunity for china to enforce political and economic process in the central asian region. proximity of the border of china and the central asian countries with rapid economic growth of china, have imposed certain conditions on central asian countries' relations with it. in general, bilateral relations between china and the cou...

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