Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (10): 2869-2874.DOI: 10.3969/j.issn.1000-2561.2021.10.016

• Plant Cultivation, Physiology & Biochemistry • Previous Articles     Next Articles

Latex Physiological Characteristics of Three Introduced Clones in Hevea brasiliensis

ZHANG Xiaofei1,2, HUANG Xiao1,2, ZUO Rubin3, LI Chen3, LI Weiguo1,2,*()   

  1. 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
    3. Yunnan Agricultural University, Kunming, Yunnan 650201, China
  • Received:2020-12-28 Revised:2021-03-15 Online:2021-10-25 Published:2021-11-25
  • Contact: LI Weiguo

Abstract:

The latex physiological characteristics of three introduced rubber clones, such as latex yield, dry rubber content, initial flow rate, sucrose content, phosphorus content, Mg2+ content, and thiol content, were measured and analyzed. The results showed that, compared to the control clone ‘Reyan 73397’ and ‘RRIM 600’, there were significant differences among the rubber clones. According to high dry rubber yield, good latex stability, fast rubber-discharging, and high sugar utilization rate, ‘Reshi 09-5’ showed high-yielding potential, but the content of sucrose and initial flow rate of ‘Reshi 09-5’ were lower than that of ‘Reyan 73397’, and there was no significant differences in dry rubber content, thiol content and phosphorus content between them. ‘Reshi 09-6’ had higher dry rubber content and plug index than ‘RRIM 600’, and there was no significant differences in initial flow rate and sucrose content between them. All of these showed that ‘Reshi 09-6’ had better potential in latex production, but a low metabolic intensity, so the production can be increased by stimulated tapping. Compared to ‘RRIM600’, ‘Reshi 09-7’ had lower dry rubber yield, initial flow rate, and higher dry rubber content, which showed high latex discharging barrier and low sugar utilization efficiency, so it need to be further tested whether the yield can be improved by stimulated tapping in ‘Reshi 09-7’.

Key words: Hevea brasiliensis, introduced clone, latex physiology, evaluation

CLC Number: