Analysis of genetic effects on a complete diallel cross test of Betula platyphylla

Zhao, Xiyang; Bian, Xiuyan; Liu, Mengran; Li, Zhixin; Li, Ying; Mi, Zheng; Teng, Weili; Jiang, Jing

doi:10.1007/s10681-014-1147-8

Cited by 24 publications

(11 citation statements)

References 22 publications

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“…Ht and CH were measured with a meter ruler; BD, DBH, and DIAM3 were measured using a caliper; SSD was estimated and squared before calculation using the method of [33]. CB was calculated by averaging the values of the north-south and east-west crown width, and CH was obtained by subtracting the tree height at the first branch from the total tree height.…”

Section: Growth Wood and Fruit Trait Measurementsmentioning

confidence: 99%

Phenotypic Variability and Genetic Diversity in a Pinus koraiensis Clonal Trial in Northeastern China

Kaviriri

Zhang

et al. 2020

Genes

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Combining phenotypic and genetic characteristics in a genetic variation study is of paramount importance to effectively orient the selection of producers’ elite trees in a seed orchard. In total, 28 phenotypic characteristics and 16 microsatellite loci were used to analyze the clonal genetic variation, to characterize the genetic diversity, and to refine the genetic classifications of 110 Pinus koraiensis clones grown in the Naozhi orchard in northeastern China. All clones were significantly different in most traits. Most of the phenotypic characteristics showed great genetic variation among clones, while the genotypic differentiation was weak between the selection sites of clones. The SSR markers showed a relatively high level of genetic diversity (Na = 4.67 ± 0.43, Ne = 2.916 ± 0.18, I = 1.15 ± 0.07, Ho = 0.69 ± 0.04, He = 0.62 ± 0.02, and mean polymorphic information content (PIC) of 0.574), with higher heterozygosity as an indication of a lower probability of inbreeding events in the orchard. Despite weak correlation coefficients between dissimilarity matrices (r(A/B), range equal to 0.022, p-value < 0.001), the genetic and phenotypic classifications congruently subdivided all the clones into three major groups. The patterns of phenotypic trait variations and genetic diversity are valuable to effectively select materials in breeding programs of P. koraiensis.

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Section: Growth Wood and Fruit Trait Measurementsmentioning

confidence: 99%

Phenotypic Variability and Genetic Diversity in a Pinus koraiensis Clonal Trial in Northeastern China

Kaviriri

Zhang

et al. 2020

Genes

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“…In the B. platyphylla assembled scaffolds, a total of 249,784 SSRs were identified (Table S1). Among the SSRs, there were 192,575, 42,276,11,755,2337,568, and 273 mono-, di-, tri-, tetra-, penta-, and hexanucleotide repeats, respectively. As expected, the mononucleotide repeat was the predominant type, accounting for 77.1% of all SSRs, followed by the di-(16.9%) and tri-(4.7%) types.…”

Section: Ssr Identification and Analysismentioning

confidence: 99%

“…A series of studies has been carried out on B. platyphylla, involving growth and development, environmental stress, and metabolic networks, for example. We also selected some plus trees (the best individuals in a group) and superior families (the best families in a larger group) through conventional breeding [6,10,11]. Despite the onset of today's genome era, there remains a lack of complete genomic information for B. platyphylla, which severely constrains the progress of relevant research.…”

Section: Introductionmentioning

confidence: 99%

Genome Survey Sequencing of Betula platyphylla

Wang

Chen

Liu

et al. 2019

Forests

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Research Highlights: A rigorous genome survey helped us to estimate the genomic characteristics, remove the DNA contamination, and determine the sequencing scheme of Betula platyphylla. Background and Objectives: B. platyphylla is a common tree species in northern China that has high economic and medicinal value. However, there is a lack of complete genomic information for this species, which severely constrains the progress of relevant research. The objective of this study was to survey the genome of B. platyphylla and determine the large-scale sequencing scheme of this species. Materials and Methods: Next-generation sequencing was used to survey the genome. The genome size, heterozygosity rate, and repetitive sequences were estimated by k-mer analysis. After preliminary genome assembly, sequence contamination was identified and filtered by sequence alignment. Finally, we obtained sterilized plantlets of B. platyphylla by plant tissue culture, which can be used for third-generation sequencing. Results: We estimated the genome size to be 432.9 Mb and the heterozygosity rate to be 1.22%, with repetitive sequences accounting for 62.2%. Bacterial contamination was observed in the leaves taken from the field, and most of the contaminants may be from the genus Mycobacterium. A total of 249,784 simple sequence repeat (SSR) loci were also identified in the B. platyphylla genome. Among the SSRs, only 11,326 can be used as candidates to distinguish the three Betula species. Conclusions: The B. platyphylla genome is complex and highly heterozygous and repetitive. Higher-depth third-generation sequencing may yield better assembly results. Sterilized plantlets can be used for sequencing to avoid contamination.

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“…Moreover, even in tree breeding programs, similar conclusions have been reached. Zhao et al ( 2014 ) reported that SCA values were higher than GCA for relevant traits in Betula platyphylla.…”

Section: Summary Of Available Information On the Inheritance Of Diffementioning

confidence: 99%

Conventional breeding, marker-assisted selection, genomic selection and inbreeding in clonally propagated crops: a case study for cassava

et al. 2015

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Key messageConsolidates relevant molecular and phenotypic information on cassava to demonstrate relevance of heterosis, and alternatives to exploit it by integrating different tools. Ideas are useful to other asexually reproduced crops.AbstractAsexually propagated crops offer the advantage that all genetic effects can be exploited in farmers’ production fields. However, non-additive effects complicate selection because, while influencing the performance of the materials under evaluation, they cannot be transmitted efficiently to the following cycle of selection. Cassava can be used as a model crop for asexually propagated crops because of its diploid nature and the absence of (known) incompatibility effects. New technologies such as genomic selection (GS), use of inbred progenitors based on doubled haploids and induction of flowering can be employed for accelerating genetic gains in cassava. Available information suggests that heterosis, non-additive genetic effects and within-family variation are relatively large for complex traits such as fresh root yield, moderate for dry matter or starch content in the roots, and low for defensive traits (pest and disease resistance) and plant architecture. The present article considers the potential impact of different technologies for maximizing gains for key traits in cassava, and highlights the advantages of integrating them. Exploiting heterosis would be optimized through the implementation of reciprocal recurrent selection. The advantages of using inbred progenitors would allow shifting the current cassava phenotypic recurrent selection method into line improvement, which in turn would allow designing outstanding hybrids rather than finding them by trial and error.

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Analysis of genetic effects on a complete diallel cross test of Betula platyphylla

Cited by 24 publications

References 22 publications

Phenotypic Variability and Genetic Diversity in a Pinus koraiensis Clonal Trial in Northeastern China

Phenotypic Variability and Genetic Diversity in a Pinus koraiensis Clonal Trial in Northeastern China

Genome Survey Sequencing of Betula platyphylla

Conventional breeding, marker-assisted selection, genomic selection and inbreeding in clonally propagated crops: a case study for cassava

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