Genetic Parameter Estima tion and Ana lysis on Improvement Effect of High－Yielding Gutta－percha Clones Assoc ia te with Eucomm ia u lm oides O liv.

LI Fang-dong; WUYUN Tana; DU Hong-yan

Based on 5 years’data of traits from35 Eucomm ia clones, genetic parameter estimation and imp rovementeffect analysis were conducted respectively on traits of leaf, bark, samara and yield. The results indicated that repeatability as high as 0. 54～0. 97 was obtained from traits of leaf, bark, samara and yield. The genetic parametersof leaf trait and bark trait were low while genetic parameterswere higher from trait of samara and yield. Four highyielding gutta－percha cloneswere selected bymeans of gutta－percha containing rate in leaf, bark and samara aswellas total yield. Analysis on genetic imp rovement effect suggested that genetic gainswere 21. 10%, 54. 9%, 12. 17%and 52. 22% in terms of gutta－percha containing rate in leaf, bark, samara and total yield, respectively, which indicated that the effect of genetic imp rovement was going well and yield of gutta－percha was enhanced.

1. Non－timber Forestry Research and Development Center, CAF, Zhengzhou　450003, He’nan, Chian

2. Central South University of Forestry and Technology, Changsha　410004, Hu’nan, China

Received Date: 2007-03-15

Abstract: Based on 5 years’data of traits from35 Eucomm ia clones, genetic parameter estimation and imp rovementeffect analysis were conducted respectively on traits of leaf, bark, samara and yield. The results indicated that repeatability as high as 0. 54～0. 97 was obtained from traits of leaf, bark, samara and yield. The genetic parametersof leaf trait and bark trait were low while genetic parameterswere higher from trait of samara and yield. Four highyielding gutta－percha cloneswere selected bymeans of gutta－percha containing rate in leaf, bark and samara aswellas total yield. Analysis on genetic imp rovement effect suggested that genetic gainswere 21. 10%, 54. 9%, 12. 17%and 52. 22% in terms of gutta－percha containing rate in leaf, bark, samara and total yield, respectively, which indicated that the effect of genetic imp rovement was going well and yield of gutta－percha was enhanced.

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Reference (15)

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Genetic Parameter Estima tion and Ana lysis on Improvement Effect of High－Yielding Gutta－percha Clones Assoc ia te with Eucomm ia u lm oides O liv.

Abstract

References

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