Selection breeding of the high-quality, cold-resistant,high-yield and wide-adaptability "Yueting glutinous rice 1;

The seeds of "Yunnan Saojiao fragrant glutinous rice" were treated by He-Ne laser(power 1.

In agar nutrient solutions as simulating the anaerobic conditions,effect of arsenic(As)on the growth and As uptake by hybrid,conventional and glutinous rice cultivars were studied.

Resistance to small brown planthopper and its mechanism in rice varieties;

Changes in levels of nitrogen, phosphorus and potassium in roots and shoots of different rice varieties under infestation by Nilaparvata lugens (Stl) (Homoptera: Delphacidae);

Influence of rice varieties on the metabolizing enzymes of Nilaparvata lugens Stl;

Effect of rice variety and fertilization timing on egg parasitism of Sogatella furcifera in the single-cropping season rice field;

To compare photosynthetic performances within rice canopies of different rice varieties,intersubspeicific hybrid Peiai64S/E32,Peiai64S/9311,X07S/Zihui100,three-line hybrid Gangyou881,inter-varietal hybrid Shanyou 63 and japonica rice variety 9516 were used as materials.

The results showed that after rice plants were infested by WBPH, photosynthesis rate and chlorophyll contents in leaves of susceptible rice varieties (TN1 and Shanyou 63) declined obviously compared to those of resistant rice variety (N22); activity of superoxide dismutase (SOD) increased and of catalase(CAT) and peroxidase (POD) decreased in susceptible rice varieties, but activity.