ORCID Profile
0000-0002-2345-0261
Current Organisation
Badan Riset dan Inovasi Nasional Republik Indonesia
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Publisher: Centro Internacional de Agricultura Tropical
Date: 31-01-2022
Abstract: Leucaena leucocephala is a potential species for wood-energy production in Indonesia. A study of genetic improvement was initiated with a progeny test of 80 lines from 10 seed sources. Plant height and stem diameter were measured at 6 and 18 months, growth index (GI) calculated at 18 months and wood biomass production measured at 30 months. Differences between seed sources for height and diameter were observed at 6 months but not at 18 months. Significant differences between lines within seed source were observed for height and diameter at 6 months and these differences remained at 18 months. Differences between lines for GI and biomass were significant at 18 and 30 months respectively. At 18 months, line mean heritability for height, diameter and GI were estimated to be moderate, namely 0.62, 0.61 and 0.62 respectively. At 30 months line mean heritability for biomass was moderately low (0.39). Genetic correlations between height and diameter were moderately high at 6 months (0.74) and increased at 18 months (0.82), while correlation between diameters at 6 and 18 months was high (0.93). The expected genetic gain from selecting the 25 and 10 best lines with a high line value for GI was 33.7% and 48.8% respectively, with lines from the Indonesian local seed sources found to be the best performers. Three lines from the newly introduced Tarramba cultivar also had good performance. These results are discussed in relation to the future improvement program of this species for wood energy production.
Publisher: IOP Publishing
Date: 07-2021
DOI: 10.1088/1755-1315/800/1/012044
Abstract: Araucaria cunninghamii is conifer trees with great commercial value for tropical and sub-tropical region. The genetic variation in growth i.e: height, diameter, volume was examined on 7 years old of A. cunninghamii progeny test at the area of Forest for Special Purpose (KHDTK) in Bondowoso, East Java. The progeny trial included 80 families from six provenances, with four replications and four trees in each row plots. The analysis showed that there were great variations of genetic growth within provenances and between provenances. It was discovered that A. cunninghamii from Fak-fak Papua had the best height growth (mean height= 10.65 m with volume mean annual increments =8.39 m 3 ha-1 year-1), while A. cunninghamii from Serui Papua had the best diameter growth (mean diameter =15.84 cm). The in idual heritability for height and diameter were classified as moderate (h 2 i = 0.16 0.30). The genetic correlation between the height and diameter was quite strong (r g = 0.79). As a result of the findings, the future genetic program strategy in the research will focus on increasing genetic bio ersity for the species in order to increase Mean Annual Increment (MAI) for supplying Indonesia’s wood demand.. The genetic ersity will be achieved through some steps in the strategy i.e: best genetic growth selection within provenances combining of genetic of the best growth between provenances and establishment of the progeny trial for next generations.
Publisher: MDPI AG
Date: 12-03-2022
DOI: 10.3390/F13030451
Abstract: Pinus merkusii, a natural tropical pine species of Indonesia, is cultivated as the second most important artificial forest for the industry in Java, after teak, to produce oleoresin. Its genetic improvement began in 1977 because of its critical role in raising community incomes. Meanwhile, the effort for genetic improvement in aphid (Pineus boerneri) resistance has just recently started since its spread was only found broadly in Java by 2004. The second-generation progeny trial for this purpose was established in 2010, with materials from the best growing 34 families of the first generation. This study aimed to obtain the best pine genotypes through screening the existing natural variations found on important characters. The reported incidence of the trigger was when the experiment was attacked significantly at 30.7% after four years, while some 67 in iduals were unexpectedly still performing well after six years. The results show that blocks affect differences for all traits of diameter, aphid resistance, and oleoresin productions, and all families differ except for the west-side yield of oleoresin production. Furthermore, heritability values at in idual and family levels were moderate for the diameter (h2i = 0.16 h2f = 0.53) and eastern oleoresin (h2i = 0.14 h2f = 0.42). The gain is 4.3% when 30% of families with the best diameters are retained, while the genetic gain reaches 11% for oleoresin production. As one of the important traits in the breeding program, aphid resistance has a weakly inherited trait (h2i =0.07 h2f =0.29). Interestingly, this trait shows positive moderate genetic correlations with the two essential economic values of diameter (rg = 0.66) and oleoresin production (rg = 0.40). Therefore, the selection of the diameter and oleoresin production will not substantially affect the resistance.
Publisher: Department of Forest Management
Date: 30-04-2017
DOI: 10.7226/JTFM.23.1.1
Publisher: Informa UK Limited
Date: 03-04-2022
Publisher: IOP Publishing
Date: 11-2021
DOI: 10.1088/1755-1315/914/1/012020
Abstract: This study was carried to examine the best provenance of seed source of Manglietia glauca at 4.5 years old. The study was conducted in Candiroto, Temanggung, Central Java. A Randomized Complete Block Design with three provenances consisting of 15 parent trees from Tasikmalaya, ten parent trees from Sumedang, and 75 parent trees from Sukabumi, West Java, were ided into ten replications. Each replication has 100 plots, and each plot consists of four plants with a planting distance is 4 m x 3m. The plant characteristics, including height and stem diameter, were measured at the age of 0.5, 1.5, 2.5, 3.5 and 4.5 years. Variant analysis and Duncan Multiple Range Test in each measurement stage were performed. The significant differences of plant height among provenances were found from 0.5 to 3.5 years old and were not significantly different afterward. The stem diameter differs significantly among the provenances at 1.5 years old only afterward, they were not significantly different. The average plant height and stem diameter at 4.5 years old were between 864-917 cm and 12.34-12.48 cm, and they were not significantly different. Therefore, it is possible to choose any seed sources of the three provenances of manglid to be used for plantation.
Publisher: IOP Publishing
Date: 11-2021
DOI: 10.1088/1755-1315/914/1/012015
Abstract: Alstonia angustiloba is a local tree species that have potential for community forest plantation therefore, it is important to provide improved seeds. This study aimed to determine the ersity of growth, estimate the value of heritability, and the genetic correlation of the 4-years-old A. angustiloba progeny test. Randomized Completely Block Design with two factors (population and family) were used in this study. In this study, families are nested in the population. The population factors consisted of 4 levels, and family factors consisted of 43 families. The analysis of variance showed that height and stem diameter growth were significantly different between populations and families at four years old. The best height and stem diameter growth at the population level was obtained from the Pendopo population, 4.45 m and 7.71 cm, respectively. At the family level, the best height growth was obtained from 9 families (4.46-5.06 m), and the best stem diameter growth was obtained from 11 families (7.48-8.72 cm). The estimated in idual heritability value for height was 0.41, and stem diameter was 0.23. Estimated family heritability values were 0.66 for height and 0.50 for stem diameter. The genetic correlation between height and stem diameter was 0.97.
Publisher: MDPI AG
Date: 22-06-2022
DOI: 10.3390/F13070977
Abstract: The native tropical pine (Pinus merkusii Jungh. and de Vriese) has been genetically improved in Indonesia since 1977 nevertheless, minor evaluations of aphid resistance have been conducted since 2004. As a result, a progeny test for aphid resistance was established in 2010 in Lawu, Central Java, Indonesia. Subjects in the trial were attacked significantly at the rate of 30.7% after 4 years, but surprisingly, some in iduals were found to be healthy without any aphid attack. The observed a 7-year progeny trial comprised 34 families with 4 trees per unitary plot and replicated in 10 blocks. At 7 years, observations during 9 months (April–December) showed that there were differences in the range of resistance across families. The stem diameter, oleoresin production, and resistance to aphid attack were evaluated, and all traits were distinct among families except for oleoresin exudation from the western side of the stem. Five families performed above average for all three traits, while three other families had high diameter and maintained good oleoresin production. These eight families can be included in a forward selection strategy. Cluster analysis revealed that the eight best families were grouped into two of the eight clusters. Phenotypic correlations revealed that all pairs of traits were significantly related, with the highest correlation registered between stem diameter and resistance to aphid attack (0.99). Forward selection ensures the simultaneous improvement of the three traits.
Publisher: IOP Publishing
Date: 11-2021
DOI: 10.1088/1755-1315/914/1/012014
Abstract: White teak ( Gmelina arborea Roxb) is an introduced species of the verbenaceae. This study observed genetic variation of G. arborea in Trenggalek, East Java. Incomplete Block Design was used for this trial comprising four replications, five populations, 50 families, and three tree plots with planting space of 3 x 2 m. Significant differences between seed origins for height and survival rate were exhibited in this study however, no significant differences between populations for diameter traits at 1 st year old. Meanwhile, significant differences between populations for height, diameter, and survival rate existed at second years old. The mean survival rate at first and second years old were 98, 44% and 95, 95%, height were 1.23 m and 2.86 m, and stem diameter was 2.18 cm and 3.66 cm. Moderate heritability’s showed for height and diameter were (h 2 i = 0.29 h 2 f = 0.30), (h 2 i = 0.24 h 2 f = 0, 38) and (h 2 i = 0.19 h 2 f = 0.30), (h 2 i = 0.18 h 2 f = 0.28). Genetic correlation for height and diameter were r g = 0.75, and r g = 0.89. Genetic variation growth of G. arborea progeny test can be used as basic information of the plus trees selection with good performance. Therefore, the open pollination between remaining plus tress will produce a good quality of seed, which will increase the volume of timber harvested.
Location: Indonesia
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