Abstract: In order to study the resin-producing capacity of different hybrid pines and the content of oleoresin, the variance and correlation analysis of resin-producing capacity and oleoresin composition of five 21-year-old hybrid pines of slash pine(PEE) and caribbean pine(PCH and PCB) and their contrast were conducted.The results showed that there was significant difference in resin-producing capacity between hybrid pine and its contrast. Lipid production ratios of 3 hybrid pines(PEE×PCH, PCH×PEE, PEE×PCB, (PCH×PEE)×PEE, PCH×(PCH×PEE)) were higher than the average of the 3 contrast by 74.55%, 23.27%, 37.19%, 65.26%, 46.71%. PEE×PCH combination had the best resin-producing capacity. Turpentine oil, β-pinene, limonene,levopimaric acid, abietic acid, neoabietic acid of different combinations had significant difference. The highest content of hybrids turpentine oil and α-pinene, β-pinene were PEE×PCH(31.02%), PEE×PCB(23.24%), PEE×PCH(14.7%), respectively. The highest levopimaric acid, abietic acid, neoabietic acid content in combinations were PEE×PCH(28.38%), PCH×(PCH×PEE)(4.34%),(PCH×PEE)×PEE(11.46%), respectively. The correlation analysis of PEE×PCH combination showed that there was no significant correlation between the resin-producing capacity and oleoresin composition, but some of oil content, β-pinene, limonene, levopimaric acid were significantly correlated.

Key words: hybrid pine, slash pine, caribbean pine, resin-producing capacity, oleoresin composition, comparative analysis