Abstract
The abundant poplar resources in southwest China have played an important role in the poplar genetic improvement.In order to protect and exploit the resources of the precious native poplars,germplasm resources collection and plus-trees selection were carried out in the regions of 7 municipalities and 31 counties in Sichuan,and 1 560 poplar samples belonging to 18 species and 3 natural hybrids were collected.Selection criterion of poplar plus-trees was established based on the comparison selection method,and 64 plus-trees were obtained.In terms of the growth characters of plus-tree in forest stand,the height and diameter criterions suited to the selection of plus-tree for scattered trees were established.Two methods will provide reference for selection of plus-trees in similar regions.
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Claims 3
Claim · model-written summary
The collection yielded 1 560 poplar samples from 18 species and 3 natural hybrids.
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1 560 poplar samples belonging to 18 species and 3 natural hybrids were collected”
Claim · model-written summary
Comparison-based selection yielded 64 poplar plus-trees.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selection criterion of poplar plus-trees was established based on the comparison selection method,and 64 plus-trees were obtained”
Claim · model-written summary
Height and diameter criteria for scattered plus-tree selection were established from forest-stand growth characters.
Verbatim
e0“the height and diameter criterions suited to the selection of plus-tree for scattered trees were established”