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Comparison Experiment of Four Introduced Timber/Latex Clones in Hevea brasiliensis
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Xiaofei ZHANG1, 2, Xiao HUANG1, 2, Weiguo LI1, 2, *
Chinese Journal of Tropical Crops | 2023, 44(3) : 526 - 534
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Chinese Journal of Tropical Crops | 2023, 44(3): 526-534
Plant Cultivation, Physiology & Biochemistry
Comparison Experiment of Four Introduced Timber/Latex Clones in Hevea brasiliensis
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Xiaofei ZHANG1, 2, Xiao HUANG1, 2, Weiguo LI1, 2, *
Affiliations
  • 1.Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
  • 2.State Center for Rubber Tree Breeding, Danzhou, Hainan 571737, China
Published: 2023-03-25 doi: 10.3969/j.issn.1000-2561.2023.03.009
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In order to objectively select new rubber tree clones suitable for China's rubber planting environment, the yield and secondary characters of four introduced clones 'Reshi 09-5' 'Reshi 09-6' 'Reshi 09-7' and 'Reshi 09-10' were systematically identified and evaluated. The results showed that among the four clones, just 'Reshi 09-7' showed fast-growing, not yet in yield. Only 'Reshi 09-5' was close to the control in the first taping year and was lower in other years. The results of latex physiological characteristics showed that, according to good latex stability, fast latex discharge and high sugar utilization rate, 'Reshi 09-5' showed good rubber production potential, had higher thiol content and lower sucrose content than that of 'RRIM600', and there was no significant difference in dry rubber yield and initial speed of latex discharge between them. 'Reshi 09-6' had higher dry rubber content and plugging index, thicker original bark and more latex tubes number than 'RRIM600', and there was no significantly differences in initial flow rate and sucrose content between them. It was considered that the variety had good rubber production potential, but the metabolic intensity of latex was low. It had better potential in latex production, but a low metabolic intensity, so the production could be increased by stimulated tapping. The results of raw rubber properties, physical and mechanical properties, molecular weight and molecular weight distribution of vulcanizates of different varieties showed that there were some differences among the four clones. 'Reshi 09-5' showed the lowest in plastic initial value and Mooney viscosity, but the highest plastic retention rate. 'Reshi 09-6' showed the highest Mooney viscosity. According to larger weight-average molecular weight, 'Reshi 09-7' showed good physical and mechanical properties. In terms of stress resistance performance, 'Reshi 09-5' had the lowest wind damage collapse rate and 'Reshi 09-10' had the highest. The results of cold-resistant outpost data showed that under the condition of no cold injury in the control clone '93-114', the cold injury grade of 'Reshi 09-5' was 1.00, and that of 'Reshi 09-7' was 0.17. The comprehensive analysis results showed that the fast-growing traits of the four introduced clones were obvious. 'Reshi 09-6' had good rubber production potential. 'Reshi 09-5' had better wind resistance than 'RRIM600', 'Reshi 09-7' had good adaptability in cold damage. Among the four clones, 'Reshi 09-6' showed better performance in yield, girth growth, latex physiological characteristics and latex quality, and suitable to popularize and cultivate in same condition.

Hevea brasiliensis Muell. Arg.  /  introduced clone  /  latex production characteristic  /  dry rubber yield  /  adaptability
Xiaofei ZHANG, Xiao HUANG, Weiguo LI. Comparison Experiment of Four Introduced Timber/Latex Clones in Hevea brasiliensis[J]. Chinese Journal of Tropical Crops, 2023 , 44 (3) : 526 -534 . DOI: 10.3969/j.issn.1000-2561.2023.03.009
Year 2023 volume 44 Issue 3
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Article Info
doi: 10.3969/j.issn.1000-2561.2023.03.009
  • Receive Date:2022-05-10
  • Online Date:2026-03-05
  • Published:2023-03-25
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  • Received:2022-05-10
  • Revised:2022-06-27
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Affiliations
    1.Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
    2.State Center for Rubber Tree Breeding, Danzhou, Hainan 571737, China
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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