This paper used field observations as primary selection and reelection through statistics method has selected fine phenotypic kudzu singles,and to choose excellent single to study the rapid propagation technology,carry on the clonal test,study drought hardiness and cold hardiness.
Further, individual selection followed, picking out 33 superior trees. Finally, through a 4-year clonal test, 12 superior clones were produced. The oil yield of these clones amounted to as high as 776.4 kg per ha, and their other significant indices proved good.
Elite trees were selected,clones were reproduced and clone test stand were established based on this method. 14 chosen clones were preliminary selected by way of the first and second Fuzzy integrated-analysis of constituents and yield.
The genetics and variation of wood density and its interaction to the growth character of three 7～10 year-old clone test plantations of Cunninghamia lanceolata were studied in Guangdong Province. The results show as follows. There are genuine genetic differences in wood density among the studied clones and 50 to 60% of the contributing factors to wood density are from the heredity elements.
In focus was a comparison between three different testing scenarios for selecting the parents mated to create future breed-ing generations, thus selecting based on phenotype, clone test or progeny test. For the main scenario, the highest GMG/Y, and the optimal selection age for clone, phenotype and progeny strategies were 0.7480 %, 0.6989% and 0.4675%;
Based on the test of clone for 18 dominant trees of Paulownia fortun-ei, three clones of T002, T016, and T009 are selected preliminarily, which feature fast growth, good tree stem and strong resistence.
The results of compatibility testing of 10 clones and the mutual cross combination of 3 excellent clones (M43,M48,and M60) showed that the average setting ratios were 21.1% and 27.4%,4.4% and 10.7% higher than that of the controls.
A simulation of optimal clonal test designs indicated that by using six locations and six blocks per location in a single-tree plot design, between 80% and 90% of the maximum selection efficiency could be obtained.
For eight populations, seedlings selected for Fusarium resistance and non-tested (control) seedlings of the same cross were compared, after propagation, in a clonal test.
In focus was a comparison between three different testing scenarios for selecting the parents mated to create future breeding generations, thus selecting based on phenotype, clone test or progeny test.
This may start as early as 2008-09 using early results from the first clone test.