Some aspects of statistical application in rubber breeding trials

Tan H., . Some aspects of statistical application in rubber breeding trials. pp. 124-142. ISSN 0127-7065

Rubber breeding trials are usually long-term and costly due to the perennial nature of the tree. Thus the experimental economy and precision in rubber breeding trials are important. This paper reviews various aspects of rubber breeding experimental designs applied in two types of trials; small-scale clone trials (LSCT) at the RRIM. In SSCT 6 trials were examined in relation to yield and girth performance using simple lattice design. Average values of trial CV were 8.4 to 26.3 with the highest value for yield per tree (26.3) followed by girth increment (24.0) and girth (8.4 - 10.9). Relative efficiency for simple lattice design over randomised block design ranges from 2.4 to 11.3. In LSCT randomised block design as well as more sophisticated designs (such as simple lattice balanced lattice and incomplete block designs) over randomised more than 20 gain in precision. The findings of 9 - 27 of the total cases studied so far having achieved more than 20 gain in efficiency with the more sophisticated experimental designs over the randomised block design in rubber breeding trials merits consideration for the use of sophisticated designs.

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Abstract

Rubber breeding trials are usually long-term and costly due to the perennial nature of the tree. Thus the experimental economy and precision in rubber breeding trials are important. This paper reviews various aspects of rubber breeding experimental designs applied in two types of trials; small-scale clone trials (LSCT) at the RRIM. In SSCT 6 trials were examined in relation to yield and girth performance using simple lattice design. Average values of trial CV were 8.4 to 26.3 with the highest value for yield per tree (26.3) followed by girth increment (24.0) and girth (8.4 - 10.9). Relative efficiency for simple lattice design over randomised block design ranges from 2.4 to 11.3. In LSCT randomised block design as well as more sophisticated designs (such as simple lattice balanced lattice and incomplete block designs) over randomised more than 20 gain in precision. The findings of 9 - 27 of the total cases studied so far having achieved more than 20 gain in efficiency with the more sophisticated experimental designs over the randomised block design in rubber breeding trials merits consideration for the use of sophisticated designs.

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Item Type:	Article
Additional Information:	Summary (En)
AGROVOC Term:	PLANTAS LACTIFERAS
AGROVOC Term:	HEVEA BRASILIENSIS
AGROVOC Term:	FITOMEJORAMIENTO
AGROVOC Term:	METODOS DE ENSAYO
AGROVOC Term:	DISENO
AGROVOC Term:	CLONES
AGROVOC Term:	RENDIMIENTO DE CULTIVOS
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:51
URI:	http://webagris.upm.edu.my/id/eprint/17122

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