Staff View: Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement

Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement

Genetic improvement of the rubber tree (Hevea brasiliensis) through conventional breeding approaches depends mainly on the availability of diverse germplasm and the amount of genetic variability present in the population. The present study was undertaken to evaluate the extent of genetic variability...

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Main Authors:	Adifaiz, A. F., Maiden, N. A., Nusaibah, S. A., Sulaiman, Z., Rafii, M. Y.
Format:	Article
Published:	Springer Science and Business Media LLC 2021
Online Access:	http://psasir.upm.edu.my/id/eprint/97436/ https://link.springer.com/article/10.1007/s42464-021-00110-x?error=cookies_not_supported&code=fb9a5984-677c-4ebc-8806-3781cda8ab03
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id	my.upm.eprints.97436
record_format	eprints
spelling	my.upm.eprints.974362024-06-19T03:47:26Z http://psasir.upm.edu.my/id/eprint/97436/ Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement Adifaiz, A. F. Maiden, N. A. Nusaibah, S. A. Sulaiman, Z. Rafii, M. Y. Genetic improvement of the rubber tree (Hevea brasiliensis) through conventional breeding approaches depends mainly on the availability of diverse germplasm and the amount of genetic variability present in the population. The present study was undertaken to evaluate the extent of genetic variability in the 1995 Rubber Research Institute of Malaysia (RRIM) Hevea germplasm core collection to determine the correlation and the direct and indirect effects of morphological and bark structural characters on latex yield. The analysis of variance showed highly significant differences among the genotypes for all the nine characters studied. The phenotypic coefficient of variations was higher than the genotypic coefficient of variations for all characters studied, suggesting that the apparent variation is not only genetic but also influenced by the growing environment in the expression of the traits. High heritability and high genetic advance were noted for latex yield, indicating the possibility of improvement for this character through phenotypic selection. Latex yield showed significant and positive correlations with plant girth, total number of latex vessel rings, total bark thickness, and total leaf area at both phenotypic and genotypic level. Path coefficient analysis revealed the highest direct effect of plant girth on latex yield, followed by total number of latex vessel rings and total bark thickness indicating the importance of these characters for yield improvement and their potential as reliable indicators for indirect selection in the established core collection. Springer Science and Business Media LLC 2021-09 Article PeerReviewed Adifaiz, A. F. and Maiden, N. A. and Nusaibah, S. A. and Sulaiman, Z. and Rafii, M. Y. (2021) Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement. Journal of Rubber Research, 24 (3). pp. 415-422. ISSN 1511-1768; ESSN: 2524-3993 https://link.springer.com/article/10.1007/s42464-021-00110-x?error=cookies_not_supported&code=fb9a5984-677c-4ebc-8806-3781cda8ab03 10.1007/s42464-021-00110-x
institution	Universiti Putra Malaysia
building	UPM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Putra Malaysia
content_source	UPM Institutional Repository
url_provider	http://psasir.upm.edu.my/
description	Genetic improvement of the rubber tree (Hevea brasiliensis) through conventional breeding approaches depends mainly on the availability of diverse germplasm and the amount of genetic variability present in the population. The present study was undertaken to evaluate the extent of genetic variability in the 1995 Rubber Research Institute of Malaysia (RRIM) Hevea germplasm core collection to determine the correlation and the direct and indirect effects of morphological and bark structural characters on latex yield. The analysis of variance showed highly significant differences among the genotypes for all the nine characters studied. The phenotypic coefficient of variations was higher than the genotypic coefficient of variations for all characters studied, suggesting that the apparent variation is not only genetic but also influenced by the growing environment in the expression of the traits. High heritability and high genetic advance were noted for latex yield, indicating the possibility of improvement for this character through phenotypic selection. Latex yield showed significant and positive correlations with plant girth, total number of latex vessel rings, total bark thickness, and total leaf area at both phenotypic and genotypic level. Path coefficient analysis revealed the highest direct effect of plant girth on latex yield, followed by total number of latex vessel rings and total bark thickness indicating the importance of these characters for yield improvement and their potential as reliable indicators for indirect selection in the established core collection.
format	Article
author	Adifaiz, A. F. Maiden, N. A. Nusaibah, S. A. Sulaiman, Z. Rafii, M. Y.
spellingShingle	Adifaiz, A. F. Maiden, N. A. Nusaibah, S. A. Sulaiman, Z. Rafii, M. Y. Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement
author_facet	Adifaiz, A. F. Maiden, N. A. Nusaibah, S. A. Sulaiman, Z. Rafii, M. Y.
author_sort	Adifaiz, A. F.
title	Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement
title_short	Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement
title_full	Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement
title_fullStr	Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement
title_full_unstemmed	Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement
title_sort	genetic variability and association of characters in the 1995 rrim hevea germplasm core collection for yield improvement
publisher	Springer Science and Business Media LLC
publishDate	2021
url	http://psasir.upm.edu.my/id/eprint/97436/ https://link.springer.com/article/10.1007/s42464-021-00110-x?error=cookies_not_supported&code=fb9a5984-677c-4ebc-8806-3781cda8ab03
_version_	1802978786131574784
score	13.211869

Genetic variability and association of characters in the 1995 RRIM Hevea germplasm core collection for yield improvement

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