Relationship between rate of laticifer differentiation number of laticifer rows and rubber yield among 1981 IRRDB germplasm collections of hevea brasiliensis

Yang S.G., . and Zeng X., . and Huang H.S., . and Tian W.M., . and Yu J.H., . Relationship between rate of laticifer differentiation number of laticifer rows and rubber yield among 1981 IRRDB germplasm collections of hevea brasiliensis. pp. 43-51. ISSN 1511-1768

Early selection based on parameters related to yield is important in the Hevea breeding program. In an attempt to characterise such parameters we investigated the variation in TNLD (time needed for laticifer differentiation) of the 1981 IRRDB germplasm collections by means of an experimental system for the induction of secondary laticifer differentiation in relation to RLCL (ratio of laticifer rows to the cell layers of the functional phloem) and rubber yield of the corresponding mature germplasm collections. The results demonstrated that TNLD varied among the 63 germplasm collections examined and was correlated to RLCL (r0.5795 highly significant) and rubber yield (r0.4558 significant level) of the mature plants. TNLD is expected to be a parameter candidate for early selection which is better than the leaflet latex method in that it is related to the secondary laticifer differentiation and also better than testtapping yield method in that early selection can be carried out with one-year-old epicormic shoot in the nursery. Large scale experiment is necessary to confirm this conclusion.

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Abstract

Early selection based on parameters related to yield is important in the Hevea breeding program. In an attempt to characterise such parameters we investigated the variation in TNLD (time needed for laticifer differentiation) of the 1981 IRRDB germplasm collections by means of an experimental system for the induction of secondary laticifer differentiation in relation to RLCL (ratio of laticifer rows to the cell layers of the functional phloem) and rubber yield of the corresponding mature germplasm collections. The results demonstrated that TNLD varied among the 63 germplasm collections examined and was correlated to RLCL (r0.5795 highly significant) and rubber yield (r0.4558 significant level) of the mature plants. TNLD is expected to be a parameter candidate for early selection which is better than the leaflet latex method in that it is related to the secondary laticifer differentiation and also better than testtapping yield method in that early selection can be carried out with one-year-old epicormic shoot in the nursery. Large scale experiment is necessary to confirm this conclusion.

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Item Type:	Article
AGROVOC Term:	Breeding
AGROVOC Term:	Hevea brasiliensis
AGROVOC Term:	Germplasm collections
AGROVOC Term:	Rubber
AGROVOC Term:	Yields
AGROVOC Term:	Latex
AGROVOC Term:	Plants
AGROVOC Term:	Early selection
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23057

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