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Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia

Shorea leprosula is a tree species endemic to Southeast Asian rainforest that is highly valued for its timber and resin. Therefore, it has potential to be grown in forest plantations. To achieve this, a tree improvement program was conducted via a progeny trial, consisting of 40 half-sib families...

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Main Authors: Abdullah, Mohd-Zaki, Wook, Nor-Fadilah, Rajoo, Keeren Sundara, Lias, Muhammad-Asri
Format: Article
Published: 2021
Online Access:http://psasir.upm.edu.my/id/eprint/97486/
https://ijafp.org/issue/volume-11-september-2020-2/
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spelling my.upm.eprints.974862024-06-19T03:30:51Z http://psasir.upm.edu.my/id/eprint/97486/ Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia Abdullah, Mohd-Zaki Wook, Nor-Fadilah Rajoo, Keeren Sundara Lias, Muhammad-Asri Shorea leprosula is a tree species endemic to Southeast Asian rainforest that is highly valued for its timber and resin. Therefore, it has potential to be grown in forest plantations. To achieve this, a tree improvement program was conducted via a progeny trial, consisting of 40 half-sib families planted at Kemasul Forest Reserve (FR), Pahang, Malaysia. The main objectives were to evaluate the growth performances of S. leprosula progeny test based on selected growth traits and to estimate the values of heritability and genetic gain. The progeny trial plot was established with 40 half-sib families that originated from 5 populations. The trial plot was laid out in a randomized complete block design (RCBD) with 8 blocks and 4 trees planted per block making the total planted trees amounting to 1280 with a total area of 2.05 hectare. This paper will discuss the variations in the growth performances, heritability (h2) and genetic gain (∆G) estimated from the following growth traits; diameter at breast height (DBH), total height (HT), clear bole height (CBH), mean crown radius (MCR), crown class, stem form, branch angle, branch size and forking characteristics. Findings showed that the survival rate (47.1%) of S. leprosula progeny test in Kemasul FR was relatively low due to an inevitable factor such as disturbance from wild elephant. In addition, the growth variations observed were significantly high (p < 0.05) among the important economic traits such as DBH, HT and CBH. Besides, there were high variations observed within the progenies and among the 40 half-sib families. There were five families (F5, F4, F18, F1 and F28) that performed well based on the ordinal ranking. These five families originated from Menyala River FR and Gombak FR. On the other hand, based on the estimation of heritability (h2) and genetic gain (∆G), the HT trait showed the highest value indicating that this trait could be considered as an important trait in family selection. Furthermore, findings in this study have managed to provide important fundamental knowledge in establishing a seedling seed orchard for S. leprosula. 2021 Article PeerReviewed Abdullah, Mohd-Zaki and Wook, Nor-Fadilah and Rajoo, Keeren Sundara and Lias, Muhammad-Asri (2021) Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia. International Journal of Agriculture, Forestry and Plantation, 11 (June). 104 - 113. ISSN 2462-1757 https://ijafp.org/issue/volume-11-september-2020-2/
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 Shorea leprosula is a tree species endemic to Southeast Asian rainforest that is highly valued for its timber and resin. Therefore, it has potential to be grown in forest plantations. To achieve this, a tree improvement program was conducted via a progeny trial, consisting of 40 half-sib families planted at Kemasul Forest Reserve (FR), Pahang, Malaysia. The main objectives were to evaluate the growth performances of S. leprosula progeny test based on selected growth traits and to estimate the values of heritability and genetic gain. The progeny trial plot was established with 40 half-sib families that originated from 5 populations. The trial plot was laid out in a randomized complete block design (RCBD) with 8 blocks and 4 trees planted per block making the total planted trees amounting to 1280 with a total area of 2.05 hectare. This paper will discuss the variations in the growth performances, heritability (h2) and genetic gain (∆G) estimated from the following growth traits; diameter at breast height (DBH), total height (HT), clear bole height (CBH), mean crown radius (MCR), crown class, stem form, branch angle, branch size and forking characteristics. Findings showed that the survival rate (47.1%) of S. leprosula progeny test in Kemasul FR was relatively low due to an inevitable factor such as disturbance from wild elephant. In addition, the growth variations observed were significantly high (p < 0.05) among the important economic traits such as DBH, HT and CBH. Besides, there were high variations observed within the progenies and among the 40 half-sib families. There were five families (F5, F4, F18, F1 and F28) that performed well based on the ordinal ranking. These five families originated from Menyala River FR and Gombak FR. On the other hand, based on the estimation of heritability (h2) and genetic gain (∆G), the HT trait showed the highest value indicating that this trait could be considered as an important trait in family selection. Furthermore, findings in this study have managed to provide important fundamental knowledge in establishing a seedling seed orchard for S. leprosula.
format Article
author Abdullah, Mohd-Zaki
Wook, Nor-Fadilah
Rajoo, Keeren Sundara
Lias, Muhammad-Asri
spellingShingle Abdullah, Mohd-Zaki
Wook, Nor-Fadilah
Rajoo, Keeren Sundara
Lias, Muhammad-Asri
Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia
author_facet Abdullah, Mohd-Zaki
Wook, Nor-Fadilah
Rajoo, Keeren Sundara
Lias, Muhammad-Asri
author_sort Abdullah, Mohd-Zaki
title Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia
title_short Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia
title_full Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia
title_fullStr Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia
title_full_unstemmed Growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at Kemasul Forest Reserve, Pahang, Malaysia
title_sort growth variation, heritability and genetic gain in the firstgeneration of shorea leprosula progeny test at kemasul forest reserve, pahang, malaysia
publishDate 2021
url http://psasir.upm.edu.my/id/eprint/97486/
https://ijafp.org/issue/volume-11-september-2020-2/
_version_ 1802978786993504256
score 13.211869

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