Niche characteristics of dominant populations in Cyclobalanopsis glauca forest in Gutian Mountain;

Dynamic characteristics of the dominant populations in different succession stages of evergreen broad-leaved forest on Tiantai Mountain in Zhejiang Province;

Niche characteristics of dominant populations in Elaeagnus mollis communities,Shanxi;

Occurrence and control of two dominant species of fruit-piercing moth;

The dominant species are Coccinella septempunctata,Rodolia pumila,R.

Aims Our purpose is to examine changes in community composition and niche character-istics of dominant species in an artificial plant community in the wind-breaking and sand-fixing forest in the lower reaches of the Tarim River, Xinjiang, China.

Niche characteristics o f 25 dominant populations in the forest communities o fBa baoshan,Guangdong,were studied by computing their niche breadth value andniche overiap value.

Study of dominant populations and their spatial structures of evergreen broadleav.

The floristic composition and community structure of dominant populations were examined by applying the age class substituting for size structure change.

Study on heterosis groups of maize inbred lines in Guizhou;

Heterosis groups definition and three methods which were mostly utilized in constructing heterosis groups were introduced in the paper.

The heterotic groups of waxy maize in Jiangsu province were Tongxi 5 group,Hengbai 522 group and other groups,with Tongxi 5 group and Hengbai 52 group being the main group.

The heterosis analysis showed that the inter-group heterosis was greater than the intra-group heterosis,which indicates the feasibility of dividing rice heterotic groups by using SSR markers.

Heterotic grouping of 22 maize inbred lines, including 18 quality protein maize (QPM) lines and 4 domestic temperate common testers that represent four heterotic groups used dominantly in China, were classified by SSR markers.