Variation in Platycladus orientalis (Cupressaceae) Reproductive Output and Its Effect on Seed Orchard Crops’ Genetic Diversity

Jiao, Si-Qian; Li, Meiyu; Zhu, Yuan-Jiao; Zhou, Shanshan; Zhao, Shiwei; Li, Zhichao; Bao, Yu-Tao; Shi, Tian-Le; Zhang, Huijin; Yang, Xiao-Lei; Zhu, Jie; Porth, Ilga; El‐Kassaby, Yousry A.; Cheng, Shiping; Li, Yue; Mao, Jian‐Feng

doi:10.3390/f12111429

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Maleness index (M i ) was defined as the proportion of a clone's reproductive success that is transmitted through its pollen, that is, by paternal parents (Figure 5) [31,32,68]. The Mi represents the sexual asymmetry of parental contribution to seed crops among clones and provides a quantitative measure of gender [68][69][70] under some assumptions, such as equal fertility, and equality between ovule and pollen production. The M i based on female and male fertility (e.g., female and male strobilus production) was calculated as follows:…”

Section: Parental Balance Curve and Maleness Indexmentioning

confidence: 99%

Fertility Variation and Gene Diversity in Forest Populations

Kang,

Bilir,

Jeon

et al. 2023

Forests

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Fertility variation, defined as a difference in the ability to create progeny (i.e., reproductive success) among individuals, was reviewed using the related available theoretical and practical literature in an attempt to contribute to and improve future studies on the subject. Fertility variation is a useful guide for various purposes such as gene conservation, seed production programs, forest genetic resource (i.e., seed sources) management, other forestry practices (e.g., regeneration), and evolutional and physiological studies. Many papers and proceedings have been published, including both theoretical and practical approaches, on how fertility variation has improved in the last two decades. Large variations in fertility were widely reported among populations within species and among species. We reviewed the literature and combined our diverse knowledge to examine fertility variations and their linkage parameters. Fertility variations and their related parameters (e.g., gene diversity, status number, effective parent number, parental–balance curves) estimated based on reproductive characteristics have been studied for many years using easy and cheap surveys that are used for different purposes in forest sciences. Their importance is increasing and their use is becoming more widespread because of these advantages, leading to improvements in research papers. While many research papers have recently been published on fertility variations and linkage parameters, a review paper has not been published to date. Therefore, a review paper is needed based on a literature survey and unpublished experience, as a guide for future studies.

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Section: Parental Balance Curve and Maleness Indexmentioning

confidence: 99%

Fertility Variation and Gene Diversity in Forest Populations

Kang,

Bilir,

Jeon

et al. 2023

Forests

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Impact of Thinning on Sexual Symmetry and Gene Diversity in Pinus brutia Ten. Plantation

Çerçioğlu

2024

Bilge International Journal of Science and Technology Research

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Thinning is widely used in the context of sustainable forestry, but its impact on the gene diversity of the next generation remains unclear. In this study, we evaluated some commonly proposed genetic parameters for managing gene diversity in seed orchards. In this framework, we checked whether sexual symmetry, fecundity variation, and linked metrics (i.e., effective population size and gene diversity) can be used to optimize gene diversity through thinning in production forests. We divided trees in a Brutia pine plantation in southern Türkiye into three different canopy cover classes: the control group, the moderately thinned group, and the heavily thinned group, and monitored them. The results of our research revealed the impact of thinning on genetic parameters and showed that these metrics can be used to manage gene diversity in production forests. We believe that this study can function as a prototype for future studies using different thinning intensities in various regions and for different species to determine the most appropriate thinning intensities for sustainability.

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Variation of Cones Production in a Silver Fir (Abies alba Mill.) Clonal Seed Orchard

Teodosiu

Botezatu

Ciocîrlan

et al. 2022

Forests

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The current study is the first to describe fertility dynamics in a Silver fir (Abies alba Mill.) seed orchard and among the few reporting related information from a mature seed orchard. The research aim was to evaluate the female cone production in order to provide support to future management measures. Observations were conducted in a clonal seed orchard from the Eastern Carpathians over six years; all the ramets of 44 clones and the zero-inflated data were analyzed with generalized lineal mixed effects models in a Bayesian framework. The results indicated a higher influence of the year and probably of the sensitivity to climate, and less variability between clones, in both the Poisson and zero-inflated components of cones production. The repeatability of mean annual clone production suggests moderate continuity of cone crops in the production rank of individual clones, while the estimates of heritability were under a moderate genetic control. The values of heritability were influenced by the reporting scale (latent vs. original data scale); therefore, caution in the analysis of non-Gaussian data and in comparisons of heritability between seed orchards is required. The variation of the female cone production was higher than expected for a seed orchard, but with marked variation across years, similar to other related indicators, patterns specific to mature, and productive commercial seed orchards. Several management options to be applied in the future were also discussed.

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Variation in Platycladus orientalis (Cupressaceae) Reproductive Output and Its Effect on Seed Orchard Crops’ Genetic Diversity

Cited by 3 publications

References 37 publications

Fertility Variation and Gene Diversity in Forest Populations

Fertility Variation and Gene Diversity in Forest Populations

Impact of Thinning on Sexual Symmetry and Gene Diversity in Pinus brutia Ten. Plantation

Variation of Cones Production in a Silver Fir (Abies alba Mill.) Clonal Seed Orchard

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