| Wolfberry (Lycium barbarum) has important ecological, medicinal and food value. Wolfberry could bear salt and alkali. It could normally grow and fruit in the land which other plants couldn't grow. Therefore, it was firstly chosen and planted in saline and alkaline land.The root, stem, leaf, bloom and fruit of Chinese wolfberry could be used in medicine. They have effects of building up immunity, anti-aging, resisting caducity and tumour, decreasing blood sugar and blood grease etc. At the same time, Chinese wolfberry is rich in nutrition. It contains protein, vitamins, amino acids and microelements. The stem and leaf could be used as tea, soft drink and edible food. The fruit could be eaten raw or made in dry fruit, so it is a perfect medicine and edible plant resource.From the 80's of last century, China has enhanced the breeding work, and has developed a large number of excellent new varieties. In the promotion of new varieties, we found that the fruit-set rate and the quality of certain varieties at different sites were greatly different. Even the weather and soil conditions in some orchards were similar, the fruit yield and quality were obvious different. Does pollination mode lead to low rate of fruit set? Does different pollination mode influence on the quality of fruit? However, in practice, people usually believe that Lycium barbarum is a self-pollinated plant. Generally speaking, there was no pollinizer in production. Are all cultivars self-pollinated plant and whether it is needed to arrange pollinizer? So, it is urgently needed to study the pollination and fruit setting mechanism of Lycium barbarum.This study began in the spring of 2008, in Inner Mongolia Horticulture Institute (Hohhot). "Ning Qi No.1", "Meng Qi No.1" which was a new high-quality variety of the Inner Mongolia and "Meng Qi No.2" mainly cultivated in production was chosen as the test material. Their phenophase was observed. Their pollen viability was measured (I2-KI staining). The effects of self-pollination (isolation by bagging flowers, artificial self-pollination), cross-pollination and mixed-pollination on rate of fruit set were studied. Fruit setting rate, the quality of fruit (including fruits longitudinal diameter, transverse diameter, fruit weight, flesh thickness, ratio of seed weight to the fresh fruit weight of fresh fruit were investigated; The dried fruit total sugar, reducing sugar, ash, moisture, titratable acidity, calcium, iron, carotene, vitamin B1, vitamin B2, vitamin C, amino acids, such as the sum of indicators) were measured.The main results are as follows:1. The germination period of three test varieties was around April 14. The beginning of flowering was on about May 15. The full flowering stage was on May 29. Their flowering period was consistent and they could pollinate each other naturally.2. The viabile pollen ratios of three test species were more than 80% and they could pollinate each other under natural condition.3. Different pollination methods had great effect on setting fruit rate of "Meng Qi No.1" and "Meng Qi No.2" , that is—the fruit-setting rate of self-pollination (average 36%) was significantly lower than cross-pollination (average 70%) and mixed-pollination (average 72%). But it had little effect on "Ning Qi No.1". The fruit-setting rates of three pollination methods is close (an average of 70-74%).4. Different pollination methods had no significant effect on fruit qualities of three test varieties. Fruit size and nutritional components for the same variety were not significantly different among different pollination methods. Conclusion: the fruit-setting rate of "Meng Qi No.1" and "Meng Qi No.2" under cross pollination was great higher than that under self-pollination. They showed self-incompatability to some extent. Therefore, pollinizer should be configured for "Meng Qi No.1" and "Meng Qi No.2", but it is not needed to do so for "Ning Qi No.1". The fruit-setting rate and fruit quality of pollinizer under self-pollination had no effects on those of the main cultivated varieties.
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