Abstract:

The major aim of this test is that the actual increment and main genetic parameter of the original high-quality stands were evaluated by testing progeny of Pinus yunnanensis, so as to examine "The Selection Method and Criterion of District (Western Yunnan) of The Original High-quality Stands of Pinus Yunnanensis". The authors adopted completely random district-group design to carry out the test in Guyong Forest Farm of Tengchong County in 1988. The results from the continous seven-year investigation show that the progeny of the original high-quality stands have the characteristics of straight tree-trunk, minor twinst degree of grain on wood, high growth increment, the actual increment of the tree height, DBH, volume of timber and twinst degree of grain reached respectively 37.49%, 65.60%, 219.84% and 269.57%, their genetic gain reached respectively 20.14%, 40.46%, 107.11% and 59.79%, their genetic gain reached respectively 20.14%, 40.46%, 107.11% and 59.79%. The data mentioned above have far exceeded 3% of tackling-key-problem check-up index of progeny genetic gain of original high-quality stands of pinus yunnanensis. The test feedback indicates that "The Selection Method and Criterion (western Yunnan) of the Original High-quality Stands of Pinus yunnanensis" is scientific and reliable.

Key words: Pinus yunnanensis, High-quality stands, Progeny test, Genetic gain