Development of a mulberry core collection originated in China to enhance germplasm conservation

Zhāng, Yànfāng; Hu, Dewei; Zuo, Jincheng; Zhang, Ping; Wang, Zhaohong; Chuanjie, Chen

doi:10.1590/1984-70332019v19n1a08

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…In this study, the core collections yielded a CR% of more than 80% (97.43%) and an MD% of less than 20% (7.88%) (Table 7). Similar results for other species were reported in core collections developed with a lower MD% or higher CR%, which were more representative of the entire collections [72,73]. In addition, the distributions of each phytochemical in the tea accessions showed similarities to those of the entire collection (Figure S1).…”

Section: Development Of a Target-oriented Core Collectionsupporting

confidence: 83%

Utilization of Phytochemical and Molecular Diversity to Develop a Target-Oriented Core Collection in Tea Germplasm

Hyun¹,

Gi²,

Raveendar³

et al. 2020

Agronomy

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Tea has received attention due to its phytochemicals. For the direct use of tea germplasm in breeding programs, a core collection that retains the genetic diversity and various phytochemicals in tea is needed. In this study, we evaluated the content of eight phytochemicals over two years and the genetic diversity through 33 SSR (simple sequence repeats) markers for 462 tea accessions (entire collection, ENC) and developed a target-oriented core collection (TOCC). Significant phytochemical variation was observed in the ENC between genotypes and years. The genetic diversity of ENC showed high levels of molecular variability. These results were incorporated into developing TOCCs. The TOCC showed a representation of the ENC, where the mean difference percentage, the variance difference percentage, the variable rate of coefficient of variance percentage, and the coincidence rate of range percentage were 7.88, 39.33, 120.79, and 97.43, respectively. The Shannon’s diversity index (I) and Nei’s gene diversity (H) of TOCC were higher than those of ENC. Furthermore, the accessions in TOCC were shown to be selected proportionally, thus accurately reflecting the distribution of the overall accessions for each phytochemical. This is the first report describing the development of a TOCC retaining the diversity of phytochemicals in tea germplasm. This TOCC will facilitate the identification of the genetic determinants of trait variability and the effective utilization of phytochemical diversity in crop improvement programs.

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Section: Development Of a Target-oriented Core Collectionsupporting

confidence: 83%

Utilization of Phytochemical and Molecular Diversity to Develop a Target-Oriented Core Collection in Tea Germplasm

Hyun¹,

Gi²,

Raveendar³

et al. 2020

Agronomy

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“…In this study, the core collection formed with 12 genotypes included 5.4% of the total genotypes of the original collection. In coordination with current results, Yanfang et al [53] evaluated a collection of 560 mulberry accessions with 40 morphological features in China, declaring that 5% is the best ratio for an ideal core collection in this tree species. However, in the formation of a core collection of olive [54], apricot [20], and apple [55] using molecular markers, collections with a rate of 10-19, 8, and 12.4% were formed respectively, which are higher than that of pomegranate.…”

Section: Discussionmentioning

confidence: 69%

Development of a Multipurpose Core Collection of New Promising Iranian Pomegranate (Punica granatum L.) Genotypes Based on Morphological and Pomological Traits

et al. 2021

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Establishment of a core collection, of limited size and better representation of the whole germplasm phenotypic diversity, is fundamental for fruit tree breeding programs from an economic and management points of view. To achieve this goal with pomegranate fruit trees, 221 genotypes were evaluated for 25 morphological and pomological traits during two successive years. Using the maximization strategy in Power Core software, 12 out of 221 pomegranate genotypes were selected for the new core collection, reducing the population size to 5.42% of the entire collection. Variance difference (VD%) and mean difference (MD%) were calculated as 42.68% and 7.03% in core collection, respectively. This indicates an excellent diversity amongst genotypes within the core collection. The Shannon’s diversity index (H′) in the formed collection suggested that 19 out of 25 phenotypic variables were of high diversity. Results showed that core collection genotypes are equally presented in all three population groups formed by cluster analysis through the original collection. The current research is the first in using phenotypic data to establish a core collection of Iranian pomegranate germplasm. The formation of this core collection will be an effective step towards examining the diversity of the original population and breeding prospects.

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“…Brown proposed core collection in 1989 and used a sampling ratio of 10% [50]. However, with ongoing research, the sampling ratio of the core collection of different species is not exactly 10%, basically ranging from 5% to 40% [51,52]. For example, a core collection of just 5% of mulberry germplasm could represent the genetic diversity of 560 mulberry samples [52].…”

Section: Construction Of Core Collectionmentioning

confidence: 99%

“…However, with ongoing research, the sampling ratio of the core collection of different species is not exactly 10%, basically ranging from 5% to 40% [51,52]. For example, a core collection of just 5% of mulberry germplasm could represent the genetic diversity of 560 mulberry samples [52]. A sampling ratio of 11% was deemed suitable for constructing a core collection of Perilla frutescens L., which could include all alleles in the germplasm resource [53].…”

Section: Construction Of Core Collectionmentioning

confidence: 99%

Construction of Core Collection and Phenotypic Evaluation of Toona sinensis

Dai

Fan

Yin

et al. 2023

Forests

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Toona sinensis is an important “vegetable and timber” tree species that is widely distributed in eastern and southeastern Asia. An efficient mechanism for preserving and utilizing germplasm resources is crucial for speeding up the process of genetic improvement of T. sinensis. We collected a total of 1040 germplasm resources of T. sinensis from China, Britain, and New Zealand. Using a total of 27,040 markers, we analyzed the genetic diversity, genetic structure, and core collection of these resources. Additionally, a comprehensive evaluation method for phenotypes of T. sinensis was established by principal component analysis (PCA) and the technique for order preference by similarity to ideal solution (TOPSIS). Our analysis included three main results: Firstly, the breeding population, consisting of a total of 1040 individuals, contains a diverse genetic pool and can be divided into two genetic clusters. Secondly, the best core collection was obtained from the alternative population, consisting of a total of 208 individuals and comprising 20% of the breeding population. It was screened out based on Core Hunter 3 software with the average entry-to-nearest-entry (E-NE) algorithm. Finally, a comprehensive evaluation method was established based on eight selected agronomic traits of the core collection. This method allowed us to screen the best individual plants of the core collection, including N0237, N0972, and N0409. Overall, our research findings will enable better preservation and utilization of T. sinensis germplasm resources and result in faster improvement of T. sinensis varieties.

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Development of a mulberry core collection originated in China to enhance germplasm conservation

Cited by 6 publications

References 21 publications

Utilization of Phytochemical and Molecular Diversity to Develop a Target-Oriented Core Collection in Tea Germplasm

Utilization of Phytochemical and Molecular Diversity to Develop a Target-Oriented Core Collection in Tea Germplasm

Development of a Multipurpose Core Collection of New Promising Iranian Pomegranate (Punica granatum L.) Genotypes Based on Morphological and Pomological Traits

Construction of Core Collection and Phenotypic Evaluation of Toona sinensis

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