Effect of thinning intensity on tree growth and temporal variation of seed and cone production in a Pinus koraiensis plantation

Nguyen, Thanh Tuan; Dinh, Tai Tien; Zhang, Peng; Razaq, Muhammad; Shen, Hailong

doi:10.1007/s11676-018-0690-x

Cited by 15 publications

(10 citation statements)

References 42 publications

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“…For centuries, P. koraiensis has been extensively used as a major source of excellent timber, natural remedies and edible pine nuts, due to its excellent wood properties and nutritional value [3][4][5]. Pine nuts have a high nutritional value, and they include a variety of essential nutrients, such as vitamins, proteins, and unsaturated fatty acids, among others [6,7]. The nuts have the function of preventing cardiovascular disease caused by elevated cholesterol [8].…”

Section: Introductionmentioning

confidence: 99%

Development and Transferability of EST-SSR Markers for Pinus koraiensis from Cold-Stressed Transcriptome through Illumina Sequencing

Liu

Wei

et al. 2020

Genes

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Pinus koraiensis has significant economic and ecological value in Northeast China. However, due to the lack of suitable molecular markers, only a few available microsatellite markers were developed for further population genetics studies. In this study, for the first time we developed expressed sequence tag–simple sequence repeat (EST-SSR) markers from the cold-stressed transcriptome of P. koraiensis using Illumina Sequencing. We identified a total of 7,235 EST-SSRs from 97,376 sequences, and we tested their transferability among seven related Pinus species. The results showed that trinucleotides were the most abundant type of repeat (1287, 18.74%) excluding mononucleotides, followed by dinucleotides (1284, 18.7%) and tetranucleotides (72, 1.05%). The most dominant dinucleotides and trinucleotide repeat motifs were AT/AT (535, 7.79%) and AAT/ATT (103, 1.5%). The observed heterozygosity (Ho) and expected heterozygosity (He) ranged from 0.002 to 0.986 and 0.017 to 0.743, respectively, and the polymorphism information content (PIC) values and number of alleles (Na) varied from 0.029 to 0.794 and 2 to 23, respectively. A total of 8 natural P. koraiensis populations were divided into two main genetic clusters. Furthermore, nine of twenty polymorphic primer pairs were successfully amplified in seven Pinus species, and at least 80% of the successful P. koraiensis EST-SSR primers could be amplified in more than four species (16, 80%). Combined results for the development of EST-SSR markers in P. koraiensis and transferability among related species would contribute to improved studies on the genetic diversity and population structure in P. koraiensis and phylogenetic relationships among Pinus species. They would also provide a significant source for quantitative trait locus analysis.

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Section: Introductionmentioning

confidence: 99%

Development and Transferability of EST-SSR Markers for Pinus koraiensis from Cold-Stressed Transcriptome through Illumina Sequencing

Liu

Wei

et al. 2020

Genes

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“…Management practices on seed orchards and seed stands have been postulated to increase the seed yield (Moreno-Fernández et al, 2013;Nguyen et al, 2019). Also observed is the dwindling acreage of seed sources, regionally, especially in sub-Saharan Africa .…”

Section: Introductionmentioning

confidence: 99%

Morphometrics of Pinus patula crown and its effect on cone characteristics and seed yield in Kenya

Angaine¹,

Onyango²,

Owino³

2020

J. Hortic. For.

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Pinus species and other conifers have cones as an essential unit for seed production. Cone production in pines is not uniform and often varies among compartments and sectors within the crown. Many countries experience challenges in seed production from orchards due to poor practices. The present study aimed to evaluate within-crown cone production patterns, cone characteristics, and seed yield in a Pinus patula clonal seed orchard in Londiani, Kenya. Crown height was divided into three equal portions and a further subdivision done for each of the parts into two sections. There were differences in cone characteristics within the crown, between the sections and compartments. The majority (67.1%) of the cones in the present study were curved. The study also showed that cone shape had no significant influence on seed yield. The present study observed cones collected from the top portion of the crown yielded the highest amount of seed (33.3±4.91 seeds) (p<0.05) while the bottom part had the lowest (14.4±2.76) (p<0.05). The study recommends the collection of P. patula seeds from the upper part of the crown in unmanaged stands. Further, it suggests that management through pollarding needs to be done regularly to minimize within-crown differences.

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“…Seeds are equally important products of Korean pine plantations as timber. Although preliminary models for seed production have been suggested (e.g., Jin et al 2017;Nguyen et al 2017), there is room for improvement since the previous models are either unsuitable for simulation (Nguyen et al 2017) or are based on small datasets and partly on expert knowledge (Jin et al 2017). Better models for seed production would enhance possibilities to optimize the management of Korean pine plantations in multifunctional forestry.…”

Section: Discussionmentioning

confidence: 99%

Developing growth models for tree plantations using inadequate data – a case for Korean pine in Northeast China

Jin¹,

Pukkala²,

Li³

et al. 2019

Silva Fenn.

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Effect of thinning intensity on tree growth and temporal variation of seed and cone production in a Pinus koraiensis plantation

Cited by 15 publications

References 42 publications

Development and Transferability of EST-SSR Markers for Pinus koraiensis from Cold-Stressed Transcriptome through Illumina Sequencing

Development and Transferability of EST-SSR Markers for Pinus koraiensis from Cold-Stressed Transcriptome through Illumina Sequencing

Morphometrics of Pinus patula crown and its effect on cone characteristics and seed yield in Kenya

Developing growth models for tree plantations using inadequate data – a case for Korean pine in Northeast China

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