Variation for Oleoresin Yielding Capability and Growth among Families and Early Selection for Superior Families in Pinus massoniana
This study examined the genetic variations of eight-year-old Pinus massoniana trees in their growth,morphologic traits,and resin yielding capability,and analyzed the genetic correlation among these traits using a progeny test at Laizhou Experimental Forest Farm in Nanping City,Fujian Province.The superior families and individuals were selected for oleoresin producing.The results showed highly significant family effects for oleoresin yielding capability,growth and crown traits.Compared with growth and crown traits,more variation existed for oleoresin yielding capability and the coefficient of variation was 61.91％,suggesting a wide base for choice.The oleoresin yielding capability was under moderate genetic control,the family heritability and individual heritability were 0.42 and 0.31,respectively.Analysis result of genetic correlation among traits showed that a strong positive genetic correlation existed between oleoresin yielding capabilty and DBH,height and individual volume,which indicated both resin yield and growth could be improved simultaneously in the breeding progress.Positive correlation was also showed between tree crown size,whorl number,living branch number and oleoresin yielding capability.DBH was the most reliable trait for indirectly selecting high-yielding oleoresin trees.Twenty superior families and sixteen superior individuals were selected according to the oleoresin yield and individual volume.The genetic gain for oleoresin yield and individual volume were 52.54％ ～ 154.40％ and 0.22％～ 31.85％,respectively.
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万方数据
维普
