Guangdong nongye kexue (Jun 2023)

Grey Relational Analysis on Yield-Related Traits of Wild Germplasm Resources of Hevea brasiliensis

  • Yanshi HU,
  • Shijun ZHOU,
  • Xiaodong LIU,
  • Min TU,
  • Xia ZENG

DOI
https://doi.org/10.16768/j.issn.1004-874X.2023.06.004
Journal volume & issue
Vol. 50, no. 6
pp. 27 – 35

Abstract

Read online

【Objective】Natural rubber is an important industrial raw materials and strategic materials, and played a very important role in national economic development. As a resource constraint industry, it was mainly produced by Brazilian rubber tree (Hevea brasiliensis) and it has the highest yield and the best quality among the mankind known rubber-producing plants. Harvesting latex is the main economic purpose of Brazilian rubber tree, latex yield is a quantitative trait controlled by minorgene, with many influencing factors, and its phenotypic value is affected by heredity and environmental effect. To determine the relationship among the yield and agronomic traits of the wild germplasm resources of Hevea brasiliensis, this study provides a scientific basis for the evaluation and screening of rubber tree germplasm resources and the selection and breeding of new varieties.【Method】The yield, growth and other related agronomic traits of 13 wild germplasm resources of Hevea brasiliensis planted in the experimental field of Chinese Academy of Tropical Agricultural Sciences (CATAS) were studied and analyzed by grey relational analysis.【Result】The results showed that the association order of the eight main agronomic traits related to the dry rubber yield per plant were stem girth, dry rubber content, average number of laticifer cells, average number of laticifer columns, bark thickness, mean stem girth increment, lateral vein latex grade and gum value ratio, and the weights of each trait were 0.1380, 0.1338, 0.1322, 0.1264, 0.1205, 0.1182, 0.1178, 0.1143. In summary, stem girth, dry rubber content, quantity of laticifers bark thickness and other traits are closely related to and have a great impact on dry rubber yield per plant.【Conclusion】Among the main agronomic traits, the stem girth, dry rubber content and quantity of laticifer should be paid more attention on the evaluation of rubber tree germplasm resources, at the same time the potential impact of other traits on yield also need to be laid some stress on.

Keywords