Genetic diversity analysis in a seed orchard of Eucalyptus tereticornis

Chezhian, P.; Yasodha, R.; Ghosh, Modhumita

doi:10.1007/s11056-009-9184-1

Cited by 25 publications

(15 citation statements)

References 41 publications

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“…This is due to the fact that commercial clones were also represented in CSOs. A similar overlap in PNG and north Queensland provenances was reported in a genetic analysis of native E. tereticornis seedlots (Chezhian et al, 2010).…”

Section: Discussionsupporting

confidence: 76%

“…Fecundity of orchard trees can be used to predict gene diversity of seed crop and relatedness among progeny, by estimating fertility variation and co-ancestry (Lindgren and Mullin, 1998). Fertility based gene diversity estimates have been used to determine overall benefit from seed orchards (Kang et al, 2001;Kamalakannan et al, 2007), while molecular markers have been widely used to evaluate genetic structure and diversity of seed orchards (Chezhian et al, 2010;Jones et al, 2006). The correlation between predicted gene diversity, and genetic diversity estimated from molecular markers is not well evaluated.…”

Section: Introductionmentioning

confidence: 99%

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Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

et al. 2019

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Fertility and gene diversity were estimated in three second generation (F2) seed stands (SPA 1-3) and two clone trials (CSO 1&2) of Eucalyptus camaldulensis to assess the impact on seed crop. F2 seedlots were evaluated in comparison to native provenances, ten commercial clones and interspecific hybrids at diverse sites. SPA 1&2 were genetic gain trials of five first generation (F1) orchard seedlots, SPA 3 a plantation of one F1 orchard seedlot, and CSOs were clone trials of 21 commercial clones established at two contrasting sites. Fertility variation, as indicated by sibling coefficient, was high (Ψ, 9-14) in the SPAs as only about 26 % trees were fertile compared to 81 % trees in CSOs. Effective population size was higher in SPA 1 and 2 (Ns, 95 and 74, respectively) than SPA 3 (Ns = 39). Fertility was highly skewed in CSO 2 resulting in low effective population size (Ns = 2) compared to CSO 1 (Ns = 11). Constant seed collection enabled 3-fold increase in relative population size and 22 % higher predicted gene diversity in CSO 2. Genetic diversity (He) estimated using SSR markers was higher in SPA 1&2 and native provenances (NAT), compared to SPA 3 and CSO 1, whereas CSO 2 and clones had lower values. There was a high positive correlation between estimated He and predicted gene diversity values of SPAs and CSOs. He was positively correlated to mean field survival and negatively correlated to kraft pulp yield (KPY), evaluated at three years in progeny trials across three locations. Number of alleles per locus was higher in SPAs and native provenances compared to CSOs and clones. Discriminant principal component analysis clustered CSO, NAT and SPA seedlots in different groups while commercial E. camaldulensis clones clustered close to NAT. Multilocus outcrossing rate was generally high (tm, 91-100 %), though selfing was observed in two families of SPA 3 and CSO 2. Selected interspecific hybrid families of commercial E. camaldulensis clones (with E. urophylla and E. pellita) evaluated at two of the sites had higher He and KPY than clones at three years.

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Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

et al. 2019

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“…Penanda ISSR (Chezhian et al, 2010), kombinasi antara RAPD dan ISSR (Josiah et al, 2008), RAPD dan mikrosatelit (Shiran et al, 2007), serta mikrosatelit (Butcher et al, 2004;Zelener et al, 2005;Jones et al, 2006;Nurtjajaningsih et al, 2007;Millar et al, 2008) telah digunakan untuk mendeteksi keragaman genetik di kebun benih. Penanda mikrosatelit umumnya digunakan karena penanda ini sangat polimorfik, bersifat codominan, netral dan dapat diamplifikasi dengan sejumlah kecil DNA (Millar et al, 2008).…”

Section: Pendahuluanunclassified

KERAGAMAN GENETIK TETUA DAN ANAKAN DARI KEBUN BENIH SEMAI Acacia mangium GRUP D (AM004) DI SUMATERA SELATAN, INDONESIA

Yuskianti¹

2014

JPKW

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ABSTRAKInformasi keragaman genetik dari satu generasi ke generasi selanjutnya merupakan faktor penting untuk pengelolaan dan konservasi genetik kebun benih. Tujuan dari penelitian ini adalah untuk mengevaluasi tingkat keragaman genetik tetua sebagai generasi pertama (F1) dan anakannya (F2) dari kebun benih Akasia mangium yang ada di kebun benih semai Grup D (AM004) di Sumatera Selatan. Analisis dilakukan terhadap 251 tetua dan ± 200 biji dari 10 pohon induk. Analisis menggunakan 12 penanda mikrosatelit menunjukkan bahwa rata-rata jumlah alel yang terdeteksi (A) dari semua tetua dan anakannya adalah 8,23 dan 7.08. Secara umum, tingkat keragaman genetik tetua dan anakan tidak berbeda (He=0.609 untuk tetua dan He=0.606 untuk anakan). Penelitian ini mendeteksi keberadaan alel baru pada anakan. Kondisi ini menunjukkan kemungkinan adanya kontaminasi serbuk sari dari luar kebun benih.Kata kunci: Keragaman genetik, kebun benih semai Sumatera Selatan, tetua, anakan, penanda mikrosatelit ABSTRACT Information on genetic diversity from one generation to its next generation is an important factor for management and conservation in a seed orchard. The purpose of this study was to evaluate the level of genetic diversity of parental as the first generation (F1) and offspring (F2) of Acacia mangium in the

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“…Its trees occur in the Australian regions of New South Wales, Queensland, and Victoria (WALLIS, 1970;BEAN, 2013), having the most extensive latitudinal distribution of its genus (BOLAND et al, 2006). Also, such species is found in the United States (FOELKEL;BARRICHELO;MILANEZ, 1975;ROCKWOOD, 2012), Mexico (FOROUGHBAKHCH et al, 2017), Brazil (SILVA et al, 2007;QUEIROZ et al, 2010;MENTONE et al, 2011;SEGUNDINHO et al, 2015), Argentina (VILLAS BÔAS et al, 2009), Colombia (LÓPEZ; BARRIOS; TRINCADO, 2015), India (SHARMA et al, 2005;VARGHESE et al, 2008;CHEZHIAN et al, 2010), and Nigeria (ADEGBEHIN; OKOJIE; NOKOE, 1988) as well as in Ecuador, Uruguay, Chile, Guyana, South Africa, Portugal and Turkey (FAO/UN, 1981). Greater preferences in plantations are due to its fast growth, wide adaptability to varied weather conditions, and high drought resistance (RAO et al, 2002), being among the main cultivated eucalypts in Brazil (QUEIROZ et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Sixteen properties of Eucalyptus Tereticornis wood for structural uses

et al. 2020

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Forest Red Gum eucalypt provides a versatile wood and is converted into different purposes. However, such wood is somewhat limited in structural ends, which highlights the need to exploit this gap through diffusion of mechanical properties of such timber. Obtained results should assist engineers and architects in decision-making for its best building application. This paper studied two physical and fourteen mechanical properties evaluation of Eucalyptus tereticornis at two different moisture contents, following the prescriptions of Brazilian (ABNT NBR 7190: 1997) and North American (ASTM D-143-14: 2014) standard documents. Thus, 1091 repeats were carried out for all properties. By a moisture reduction from 30% to 12%, the bulk density and eleven strength properties statistically showed changes such as modulus of rupture (static bending, parallel and perpendicular compressions), modulus of elasticity (perpendicular compression and static bending), shear stress, tangential cleavage, and parallel and perpendicular hardnesses. Then, the Eucalyptus tereticornis timber could be better usable if is further applied for structural construction uses.

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Genetic diversity analysis in a seed orchard of Eucalyptus tereticornis

Cited by 25 publications

References 41 publications

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

KERAGAMAN GENETIK TETUA DAN ANAKAN DARI KEBUN BENIH SEMAI Acacia mangium GRUP D (AM004) DI SUMATERA SELATAN, INDONESIA

Sixteen properties of Eucalyptus Tereticornis wood for structural uses

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