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Infl uence of altitude and tree class on climate-growth relationships in a larch plantation in subtropical China

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林业研究:英文版 2023年第6期34卷 1869-1880页

作者： Chunyan Wu Dongsheng Chen Xiaomei Sun Shougong Zhang State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091People’s Republic of China

Precise quantifi cation of climate-growth relationships can make a major contribution to scientifi c forest management.However,whether diff erences in the response of growth to climate at diff erent altitudes remains unclear.To answer this,264 trees of Larix kaempferi from 88 plots,representing diff erent altitudinal ranges(1000-2100 m)and tree classes were sampled and used to develop tree-ring chronologies.Tree-ring growth(TRG)was either positively(dominant)or negatively(intermediate and suppressed)correlated with climate in diff erent tree classes at diff erent altitudes.TRG was strongly correlated with growing season at low altitudes,but was less sensitive to climate at middle altitudes.It was mainly limited by precipitation and was highly sensitive to climate at low altitudes.Climate-growth relationships at high altitudes were opposite compared to those at low altitudes.TRG of dominant trees was more sensitive to climate change compared to intermediate and suppressed trees.Climate factors(annual temperatures;moisture,the number of frost-free days)had diff erent eff ects on tree-ring growth of diff erent tree classes along altitudinal gradients.It was concluded that the increase in summer temperatures decreased water availability,resulting in a signifi cant decline in growth rates after 2005 at lower altitudes.L.kaempferi is suitable for planting in middle altitudes and dominant trees were the best sampling choice for accurately assessing climate-growth relationships.

关键词： Tree-ring width index Chronology Correlation coeffi cient Additive mixed models Tree classes

Mating patterns and pollen dispersal in a Japanese larch(Larix kaempferi) clonal seed orchard： a case study

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Science China(Life Sciences) 2018年第9期61卷 1011-1023页

作者： Xingbin Chen Xiaomei Sun Leiming Dong Shougong Zhang State Key Laboratory of Tree Genetics and Breeding Chinese Academy of ForestryBeijing100091China Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry Chinese Academy of ForestryBeijing 100091China Jiangxi Provincial Key Lab for Plant Biotechnology Jiangxi Academy of ForestryBeijing 100091 China

Pollination dynamics highly determines the genetic quality of seed orchard crops. However, there is less research about the effect of mating patterns on seed productivity of orchard crops. So far, clonal seed orchards have been producing genetically improved seedlings used for most Japanese larch(Larix kaempferi(Lamb.) Carr.) plantations in China. In the present study, a total of 17 highly variable simple sequence repeat(SSR) markers were used for genotyping a progeny trial population consisting of 647 open-pollinated progenies germinated from seeds which were collected from 63 maternal clones with 140 potential paternal clones in a Japanese larch clonal seed orchard in China. Paternity analysis was used in the present case study in order to evaluate the level of paternal gametic contribution, estimate pollen contamination and selfing rates, and investigate pollination patterns,pollen dispersal patterns and the impact of mating patterns on seed productivity of orchard crops. We observed 93.7% of the success rate of the parental assignment, unequal paternal gametic contribution(0–12.4%) with 6.3% of the progenies derived from pollen contamination or unsampled pollen donors, and absence of evidence for selfing. We also found that pollination rate highly depended on the distance between pollen donors and maternal parents, the majority of the identified crossing(65.7%)occurred between clones within a 150-m radius, and large variations in growth performance existed among the paternal halfsiblings. Progeny growth performance(diameter at breast(DBH) and height(HGT)) was measured at Age-20 in order to investigate the impact of mating patterns on timber production of orchard crops. As either the paternal or maternal, two clones(i.e., clones Z38 and Z62) were identified to have produced progenies with higher average stem volume breeding values than that of all of the progenies. Specifically, the genetic gains for volume were 3.53% for the two clones as paternal parents, and 8.26% as the maternal parents at Age-20. Thus, bo

关键词：日本落叶松种子发芽花粉污染交配模式果园细胞案例生长性能

Highlights of special issue on forestry

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Frontiers of Agricultural Science and Engineering 2017年第4期4卷 373-375页

作者： Shougong Zhang Chinese Academy of Forestry

Forests are a major component of terrestrial ecosystem,therefore they are an invaluable asset that has been bestowed by nature on mankind.Forests enjoy the reputation of'Lungs of the Earth'because they provide residence for both humans and other forms of life,and have multiple functions,including fixing carbon and releasing oxygen,retaining water sources,protecting and nurturing soil,purifying air,breaking wind and fixing sand,accumulating nutrient substances

关键词： Highlights of special issue on forestry

Isolation,expression and single nucleotide polymorphisms(SNPs) analysis of LACCASE gene(LkLAC8) from Japanese larch(Larix kaempferi)

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Journal of Forestry Research 2017年第5期28卷 891-902页

作者： Changyong Liu Yunhui Xie Min Yi Shougong Zhang Xiaomei Sun State Key Laboratory of Tree Genetics and Breeding Research Institute of ForestryChinese Academy of Forestry Research Institute of Forestry Chinese Academy of Forestry State Academy of Forestry Administration School of Gardening and Landscape Design Jiangxi Agricultural University

Nucleotide diversity (pi) and linkage disequilibrium (LD) analysis based on SNP marker could provide a sound basis for choosing an association analysis method. Japanese larch (Larix kaempferi) is an important timber coniferous tree species for pulping and papermaking, but its high lignin content has significantly restricted it application potential. In this study, the LACCASE gene, that plays an important regulatory role for lignin biosynthesis, was selected as research target. The full-length cDNA and genomic sequences of the encoding LkLAC8 gene were isolated from the LACCASE expressed sequence tags of the Japanese larch transcriptome database using the rapid amplification of cDNA ends-polymerase chain reaction (RACE-PCR). The cDNA was determined to be 1940 bp, with an open reading frame (ORF, 1734 bp) that encoded a protein of 577 AA. This protein contains four highly specific Cu2+ binding sites and 11 glycosylation sites, thus belonging to the LACCASE family. The deduced protein sequence shared an 89% identity with the PtaLAC from Pinus taeda. A real-time PCR analysis showed that the LkLAC8 transcript was expressed predominantly in mature xylem, with moderate levels in the immature xylem, cambium and mature leaves, the lowest in the roots. Lastly, the genomic sequences of LkLAC8 in 40 individuals from six naturally distributed populations of Japanese larch were amplified, and a total of 201 SNPs (103 and 98 mutation types of transition and transversion, respectively) were detected; the frequency of the SNPs was 1/19 bp. Nucleotide diversity among the six populations ranged from 0.0034 to 0.0053, which suggested that there were no significant differences among the populations. The LD analysis showed that the LD level decayed rapidly within the increasing length of the LkLAC8 gene. These results implied that LD mapping and association analysis based on candidate gene may be feasible for the marker-assisted breeding of new germplasms with low lignin in Japanese larch.

关键词： Gene cloning LACCASE Larix kaempferi Linkage disequilibrium Real-time PCR Single nucleotide polymorphisms

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Frontiers of Agricultural Science and Engineering 2017年第4期4卷 482-492页

作者： Chao SUN Meng LAI Shougong Zhang Xiaomei SUN Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of ForestryChinese Academy of Forestry State Key Laboratory of Tree Genetics and Breeding Chinese Academy of Forestry Key Laboratory of Silviculture Co-Innovation Center of Jiangxi Typical Trees Cultivation and UtilizationCollege of Forestry Jiangxi Agricultural University

Wood properties are important traits that determine quality of structural wood. With the aim of performing efficient early selection for wood properties we investigated genetic variation in 20 Larix kaempferi clones aged from 4 to 15 years for four quality traits: wood density, wall thickness to lumen area, microfibrillar angle(MFA) and modulus of elasticity(MOE). We observed that age-related trends in overall means varied for differen traits: MFA decreased with the age, while the others generally increased with the age. Phenotypic variance always showed significant differences from the age of 8 years onward, with CVG ranging from 4% to 25%. Also clonal repeatability increased steadily until 9 years old and then kept medium or higher intensity(0.4–0.8). After the age of 6, genetic correlations were generally higher than phenotypic correlations. Estimates of early selection efficiency suggested that the optimal selection age for wood density was at age 5–6 years, while it was 9–10 years for the other traits. In combination with previous results we proposed a comprehensive early selection strategy for larch clonal breeding that involved selection based on nursery rooting ability, phenology, growth traits, and wood properties.

关键词： early selection genetic variation wood properties Silvi Scan Larix kaempferi

Transcriptome resources and genome-wide marker development for Japanese larch(Larix kaempferi)

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Frontiers of Agricultural Science and Engineering 2014年第1期1卷 70-77页

作者： Wanfeng LI Suying HAN Liwang QI Shougong Zhang State Key Laboratory of Tree Genetics and Breeding Research Institute of ForestryChinese Academy of ForestryBeijing 100091China State Key Laboratory of Tree Genetics and Breeding Research Institute of Forest EcologyEnvironment and ProtectionChinese Academy of ForestryBeijing 100091China

While the differential responses of trees to changes in climatic and environmental conditions have been demonstrated as they age,the underlying mechanisms and age control of tree growth and development are complex and poorly understood particularly at a molecular level.In this paper,we present a transcriptome analysis of Larix kaempferi,a deciduous conifer that is widely-grown in the northern hemisphere and of significant ecological and economic value.Using high-throughput RNA sequencing,we obtained about 26 million reads from the stems of 1-,2-,5-,10-,25-and 50-year-old L.kaempferi trees.Combining these with the published Roche 454 sequencing reads and the expressed sequence tags(both mainly from Larix embryogenic cell cultures),we assembled 26670549 reads into 146786 transcripts,of which we annotated 79182 to support investigations of the molecular basis of tree aging and adaption,somatic embryogenesis and wood formation.Using these sequences we also identified many single-nucleotide polymorphisms,simple sequence repeats,and insertion and deletion markers to assist breeding and genetic diversity studies of Larix.

关键词： Larix transcriptome age wood formation somatic embryogenesis molecular marker

Global Lysine Acetylome Analysis of Flower Bud Development in Catalpa bungei

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Phyton-International Journal of Experimental Botany 2022年第3期91卷 507-524页

作者： Danlong Jing Nan Wang Nan Lu Guanzheng Qu Guolu Liang Wenjun Ma Shougong Zhang Junhui Wang State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of State Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing100091China Key Laboratory of Horticulture Science for Southern Mountains Regions of Ministry of Education College of Horticulture and Landscape ArchitectureAcademy of Agricultural SciencesSouthwest UniversityChongqing400715China State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin150040China

Lysine acetylation,a reversible and dynamic post-translational modification,plays pivotal roles in regulating many biological processes in plants.However,the information of lysine acetylation during flower development of woody angiosperm remains unclear.Herein,we identified a total of 667 lysine acetylation sites in 467 proteins in flower buds of Catalpa Bungei.The acetylated proteins were mainly involved in the pathways of carbon metabolism,glycometabolism and oxidative phosphorylation.Using functional enrichment analysis,61 and 13 acetylated proteins were involved in the glycometabolism and oxidative phosphorylation pathways,respectively.This suggests that lysine acetylated proteins play critical roles in the energy metabolism pathways.Accordingly,the protein–protein interactions were also highly enriched in the carbon metabolic pathway.Integrative analysis of lysine acetylome and transcriptome showed that transcript level changes of seven key lysine-acetylated proteins/genes involved in energy metabolism were significant different during floral transition.Importantly,compared with the normal flowering variety,the expression levels of phosphoribulokinase,phosphoenolpyruvate carboxykinase,ATP synthase and pyruvate dehydrogenase complex genes were significantly up-regulated at the stages of vegetative and transition buds during early flowering of C.bungei.These data represent the first lysine acetylome in the C.bungei flowers,and can serve as an essential basis for exploring the function of lysine acetylated proteins in the flower bud development of plants.

关键词： Lysine acetylome Catalpa bungei flower development energy metabolism

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林木重要性状形成的分子基础研究进展

中国农业科技导报 2022年第12期24卷 48-58页

作者：张守攻中国林业科学研究院林业研究所林木遗传育种国家重点实验室林木培育国家林业和草原局重点实验室北京100091

林业是国民经济的重要产业之一,深入研究以人类需求为目的的林木重要性状,解析其形成的分子基础,是建立高效育种技术体系的基本保障,对培育满足国家重大需求的突破性良种,保障我国林业可持续发展,服务国家木材安全、粮食安全、生态安全... 详细信息

林业是国民经济的重要产业之一,深入研究以人类需求为目的的林木重要性状,解析其形成的分子基础,是建立高效育种技术体系的基本保障,对培育满足国家重大需求的突破性良种,保障我国林业可持续发展,服务国家木材安全、粮食安全、生态安全和乡村振兴等重大战略具有重要意义。随着生物技术的快速发展,针对林木性状形成的分子基础研究也更加深入。综述了国内外林木性状形成的分子基础,聚焦木材形成、林木经济性状和林木抗逆性的形成与调控机制,对当前的研究进展进行了梳理,并对未来林木性状研究趋势与技术发展进行了展望。

关键词：林木性状形成分子基础研究进展

Relationship between Distribution of Soil Seed Bank and Environmental Factors in Lakeshore Wetlands,Taihu Lake,China

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湿地科学 2014年第6期12卷 723-732页

作者： LI Wei zhang shougong CUI Lijuan SUN Baodi LEI Yinru Institute of Wetland Research Chinese Academy of Forestry Institute of Forestry Research Chinese Academy of Forestry

In order to analyze the spatial pattern of soil seed bank and its relation to environmental factors in lakeshore wetlands in Taihu Lake region,4 different sites in the lakeshore wetlands(A site at fleabane zone;B site at bush and grass zone;C site at crop zone;D site at natural reed zone) were established.Seed germination experiment was carried out and ordination technique(canonical correspondence analysis) was used in the study area.The results showed that totally 21 species(7 families) germinated from the seed banks.The seed bank density of 4 sites(A,B,C,and D sites)was(3 120 ± 1 581) ind./m2,(14 800 ± 5 049) ind./m2,(4 080 ± 1 760) ind./m2and(3 600 ± 2 882) ind./m2,respectively.With the deepening of the soil,the soil seed bank density of the vertical distribution showed a downward trend.Soil p H,soil moisture content,electric conductance,vegetation cover and soil bulk density all influenced the distribution of soil seed banks.Overall,soil moisture content had the greatest impact on the soil seed bank in lakeshore wetlands in Taihu Lake region.

关键词：植物学研究理论发展