Article
Ornithology
Camille Sottas, Jiri Reif, Lubomir Pialek, Manon Poignet, Pavel Kverek, Pawel T. Dolata, Radka Reifova
Summary: Understanding reproductive isolation is important for evolutionary biology. Studying patterns of interspecific hybridization in hybrid zones can provide insight into this process. In this study, patterns of hybridization were examined in two closely related passerine species, the common nightingale and the thrush nightingale, revealing strong, yet incomplete, reproductive isolation between the species. The results suggest that nightingales are a useful model system for studying speciation with ongoing gene flow after secondary contact.
JOURNAL OF AVIAN BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Linda Hagberg, Enrique Celemin, Iker Irisarri, Oliver Hawlitschek, Jose L. Bella, Tami Mott, Ricardo J. Pereira
Summary: The process of species formation is characterized by the accumulation of multiple reproductive barriers, including hybrid male sterility. This study on the meadow grasshopper demonstrates that reproductive barriers can evolve relatively quickly, even in the presence of extensive gene flow. The findings suggest that strong demographic changes, such as contractions and expansions during glacial cycles, contribute to the evolution of reproductive barriers and the maintenance of genetic boundaries between emerging species.
Article
Genetics & Heredity
Jing Wang, Weiguo He, Wen Wang, Ziye Luo, Linmei Han, Caixia Xiang, Mingli Chai, Tangluo Li, Jihong Li, Kaikun Luo, Rurong Zhao, Shaojun Liu
Summary: Hybridization is an effective strategy to alter the genotypes and phenotypes of offspring, and distant hybridization is a useful method to generate polyploids in fish. In this study, goldfish and Bleeker's yellow tail were crossed, and successful hybrid offspring with different chromosome numbers were obtained. The study also revealed differences in genetic characteristics and gonad development between the hybrids and their parents.
FRONTIERS IN GENETICS
(2022)
Article
Agronomy
Xiaolong Fang, Yanyan Sun, Jinhong Li, Meina Li, Chunbao Zhang
Summary: Hybrid breeding is important for meeting the challenge of feeding a growing world population with limited agricultural land. There have been significant advancements in soybean genome and genetic studies, but commercialization of hybrid soybean is still in progress. This review summarizes recent progress in male sterility-based breeding programs and the current status of hybrid soybean breeding. Efforts have been made to identify male-sterile lines in soybean and over 40 hybrid soybean varieties have been developed. Increasing the out-crossing rate in an economical way is crucial for accelerating hybrid soybean breeding.
MOLECULAR BREEDING
(2023)
Article
Plant Sciences
Yi Kuang, Chi-Hsuan Lu, Fu-Chiun Hsu
Summary: Interspecific hybridization has been proven to be an effective strategy in breeding programs for Kalanchoe plants, introducing new traits. Overcoming reproductive barriers and utilizing treatments like colchicine has successfully produced fertile hybrid progenies with superior traits in Kalanchoe plants.
Article
Ecology
Yosef Kiat, Nir Sapir
Summary: This study examined the effect of elevation on the moulting speed of wing feathers in Eurasian Blackbirds, finding that birds moulted faster at lower elevations. The differences in moult speed related to elevation were modulated by bird sex, with males moulting faster at high elevations but slower at low elevations compared to females. These findings emphasize the importance of considering sex-dependent responses to spatial environmental conditions in influencing key aspects of bird activities and life-history processes.
EVOLUTIONARY ECOLOGY
(2021)
Article
Ecology
Luisa Fischer, Franca Moeller Palau-Ribes, Silke Kipper, Michael Weiss, Conny Landgraf, Michael Lierz
Summary: This study aimed to evaluate the relevance of Mycoplasma spp. in free-ranging birds, and found that free-ranging nightingales and tits do not carry Mycoplasma in their respiratory tract. This has significant implications for disease prevention and conservation of wild bird species.
EUROPEAN JOURNAL OF WILDLIFE RESEARCH
(2022)
Article
Cell Biology
Rike Stelkens, Devin P. Bendixsen
Summary: Recent research on yeast hybrids has expanded our knowledge of their evolutionary potential, prevalence in the environment, and genetic mechanisms. Studying hybrid populations allows us to understand the genetic structure and adaptation mechanisms of complex traits. This is important for industrial applications and predicting responses to climate change.
CURRENT OPINION IN GENETICS & DEVELOPMENT
(2022)
Article
Horticulture
Nanjundappa Sandeep, Banur Marulasiddappa Dushyanthakumar, Shankarappa Sridhara, Lakshmana Dasaiah, Kundur Mahadevappa Satish, Ahmed M. El-Shehawi, Mohammed M. Althaqafi, Salman Aloufi, Hanoor Sharma, Abdullah Alaklabi, Hosam O. Elansary
Summary: Wild relatives of okra are a good source of variation for breeding programs, especially for traits related to stresses and fruit quality. However, they have been largely unexploited so far. In this study, cultivated okra was crossed with three wild species, and the crossability was evaluated based on fruit set, seed set, and germination rate. Results showed that the crosses were only successful when the cultivated okra was used as the female parent, and reciprocal crosses were not successful. The interspecific hybrids exhibited normal growth but were sterile due to abnormal meiosis. Further treatments were conducted to restore fertility, and the hybrids showed differences in performance and heterosis. The information obtained in this study will help breeders develop better prebreeding material.
Article
Biology
Sarah Collinson, Esnath Hamdziripi, Hugo De Groote, Michael Ndegwa, Jill E. Cairns, Marc Albertsen, Dickson Ligeyo, Kingstone Mashingaidze, Michael S. Olsen
Summary: This article describes a hybrid seed production technology that improves maize yield in African smallholder farming conditions. By removing the need for detasseling, this technology increases the efficiency and integrity of seed production, resulting in higher maize yield. This is beneficial for both seed companies and farmers, and important for improving smallholder farmer access to higher quality seed.
COMMUNICATIONS BIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Xiaolong Fang, Xiangchi Feng, Xiaoyuan Sun, Xiangdong Yang, Qing Li, Xulei Yang, Jie Xu, Minghui Zhou, Chunjing Lin, Yi Sui, Limei Zhao, Baohui Liu, Fanjiang Kong, Chunbao Zhang, Meina Li
Summary: The cloning and characterization of the MS2 gene in soybean, which specifically expresses a protein in the anther, is reported. The MS2 gene functions in the tapetum and microspore by directly regulating genes involved in secondary metabolite biosynthesis and lipid metabolism, essential for microspore cell wall formation. A field comparison with other widely used male sterile mutants in the same genetic background demonstrated that the ms2 mutant performs the best in outcrossing rate, making it an ideal tool for building cost-effective hybrid soybean systems.
PLANT BIOTECHNOLOGY JOURNAL
(2023)
Article
Fisheries
Roman Franek, Yu Cheng, Michaela Fucikova, Vojtech Kaspar, Xuan Xie, Mujahid Ali Shah, Otomar Linhart, Ivo Sauman, Martin Psenicka
Summary: Surrogate broodstock technology has potential in aquaculture and endangered species conservation. This study investigated the effects of different sterilization strategies on surrogacy using zebrafish as a model species. Germ cell-depleted recipients with normal somatic cells were identified as the most convenient sterilization method considering germline chimera rate and reproductive output.
Review
Biochemistry & Molecular Biology
Wenjing Ren, Jinchao Si, Li Chen, Zhiyuan Fang, Mu Zhuang, Honghao Lv, Yong Wang, Jialei Ji, Hailong Yu, Yangyong Zhang
Summary: Hybrid production using Ogura CMS has become an important approach to harness heterosis in vegetables. This article provides an overview of the mapping, cloning, mechanism and application of Ogura CMS and fertility restorer genes in Brassica napus, Brassica rapa, Brassica oleracea and other cruciferous crops, and discusses the current challenges and future research directions in the application of Ogura CMS.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Takahiro Moriyama, Daniel John Shea, Naoto Yokoi, Seiro Imakiire, Takaaki Saito, Hikaru Ohshima, Hina Saito, Satoru Okamoto, Eigo Fukai, Keiichi Okazaki
Summary: In this study, a candidate mutation responsible for pollen sterility in Lilium x formolongi was identified, and the LflTDF1 gene was successfully introgressed into Easter lily, contributing to pollen-free breeding.
FRONTIERS IN PLANT SCIENCE
(2022)
Review
Biochemistry & Molecular Biology
Jiri Forejt, Petr Jansa
Summary: Hybrid sterility is an early reproductive isolation mechanism in sexually reproducing species, preventing gene flow and leading to speciation. Increasing DNA divergence between closely related species may impair homologous chromosome recognition and disrupt synapsis, resulting in early meiotic arrest or aneuploidy. Impaired recognition of homologs acts as a universal chromosomal checkpoint in hybrid sterility, and examples such as the Prdm9 gene in mice and mismatch repair machinery in yeast demonstrate chromosomal homology search-based hybrid sterility. Further investigation of meiosis at the cellular and molecular level is needed to validate the role of homolog recognition in hybrid sterility and speciation.
MOLECULAR BIOLOGY AND EVOLUTION
(2023)
Review
Biology
Matthias Stoeck, Dmitrij Dedukh, Radka Reifova, Dunja K. Lamatsch, Zuzana Starostova, Karel Janko
Summary: The roles of sex chromosomes in vertebrate hybridization and speciation are dependent on the level of divergence, affecting the degree of reproductive isolation. Undifferentiated sex chromosomes are more susceptible to introgression and may give rise to new sex chromosome systems.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Review
Genetics & Heredity
Linyi Zhang, Radka Reifova, Zuzana Halenkova, Zachariah Gompert
Summary: This review discusses the different mechanisms by which structural variants can generate or maintain reproductive isolation, the patterns expected with these different mechanisms, and relevant empirical examples of each. It also summarizes the available sequencing and bioinformatic methods to detect structural variants, and suggests empirical approaches and new research directions to obtain a more complete assessment of the role of structural variants in speciation.
Review
Genetics & Heredity
Martina Johnson Pokorna, Radka Reifova
Summary: B chromosomes are additional chromosomes found in many eukaryotic organisms, believed to originate from rearrangements and duplications of standard chromosomes. They exhibit unstable inheritance in populations and are often associated with mechanisms like meiotic drive. Despite previously being considered nonessential, recent studies have shown that B chromosomes can play significant roles in processes such as sex determination and pathogenicity.
FRONTIERS IN GENETICS
(2021)
Review
Biochemistry & Molecular Biology
Pavel Borodin, Augustin Chen, Wolfgang Forstmeier, Simone Fouche, Lyubov Malinovskaya, Yifan Pei, Radka Reifova, Francisco J. Ruiz-Ruano, Stephen A. Schlebusch, Manuelita Sotelo-Munoz, Anna Torgasheva, Niki Vontzou, Alexander Suh
Summary: Germline-restricted chromosomes (GRCs) are accessory chromosomes that exist only in the germ cells of animals and are eliminated from somatic cells through programmed DNA elimination. Recent research suggests that GRCs are present in songbirds but absent in non-passerine birds, indicating extensive germline/soma genome differences in over half of all bird species. While many questions regarding the inheritance, elimination, and function of GRCs remain unanswered, genomic, transcriptomic, and cytogenetic approaches provide insights into this widespread form of programmed DNA elimination.
CHROMOSOME RESEARCH
(2022)
Article
Ecology
Jiri Reif, Zdenek Vermouzek, Petr Vorisek, Dusan Romportl, Federico Morelli
Summary: Variation in bird community composition across habitats can be seen through changes in species' ecological characteristics. Although habitat type explains a relatively low proportion of variability in these characteristics, there are significant differences in ecological characteristics between broad habitat categories and within specific habitat types. Factors such as habitat-specific selection pressures, biogeographic constraints, and human-induced habitat changes can drive these patterns.
Article
Biodiversity Conservation
Martin Salek, Karolina Kalinova, Jiri Reif
Summary: The study explores the conservation potential of semi-natural habitats for farmland birds and finds that both open scrubland and farmland hedges have large potential for bird conservation. However, the type and area of habitats have different impacts on species richness and abundance of birds.
JOURNAL FOR NATURE CONSERVATION
(2022)
Article
Ecology
David Horak, Javier Rivas-Salvador, Jan Farkac, Jiri Reif
Summary: This study investigates the relationship between bird traits and population densities in both geographical and ecological spaces. The researchers found that habitat specialization has no effect on avian density in geographical space, but is positively correlated in ecological space. Additionally, birds with arboreal and hole-nesting strategies have higher densities in both geographical and ecological spaces.
ECOLOGY AND EVOLUTION
(2022)
Article
Ornithology
Camille Sottas, Jiri Reif, Lubomir Pialek, Manon Poignet, Pavel Kverek, Pawel T. Dolata, Radka Reifova
Summary: Understanding reproductive isolation is important for evolutionary biology. Studying patterns of interspecific hybridization in hybrid zones can provide insight into this process. In this study, patterns of hybridization were examined in two closely related passerine species, the common nightingale and the thrush nightingale, revealing strong, yet incomplete, reproductive isolation between the species. The results suggest that nightingales are a useful model system for studying speciation with ongoing gene flow after secondary contact.
JOURNAL OF AVIAN BIOLOGY
(2023)
Article
Biodiversity Conservation
David Storch, Jaroslav Kolecek, Petr Keil, Zdenek Vermouzek, Petr Vorisek, Jiri Reif
Summary: This study reveals that reducing the population change trajectory of bird populations to a linear trend may obscure the complex responses of bird populations to changing human activities. By using multivariate analysis, the study decomposes bird population dynamics into different driving factors and finds that climate change and species traits are crucial drivers of complex population dynamics of central European birds.
DIVERSITY AND DISTRIBUTIONS
(2023)
Article
Biodiversity Conservation
Adriana Holoskova, Tomas Kadlec, Jiri Reif
Summary: This study evaluates the invertebrate food availability and vegetation structure of three widespread crops (wheat, maize, and rapeseed) during their breeding. The research found that wheat, although it had the most suitable vegetation structure for birds, had limited food supply due to frequent insecticide treatment. Maize and rapeseed provided higher invertebrate abundance and biomass, but their stands created unsuitable vegetation structures for farmland birds. Conservation measures should include reducing field size and insecticide application to improve the food supply and vegetation structure.
Article
Ecology
Vaclav Bystricky, Lenka Dvorakova, Jiri Reif
Summary: Ecological succession results in a sequence of habitat types after disturbance, with different species communities associated with each type. The conservation status of these communities informs about environmental pressures on the habitats. We focused on birds and compared their conservation status across different habitat types in Central Europe.
Article
Cell Biology
Radka Reifova, S. Lorena Ament-Velasquez, Yann Bourgeois, Jenn Coughlan, Jonna Kulmuni, Agnieszka P. Lipinska, Genta Okude, Laurie Stevison, Kohta Yoshida, Jun Kitano
Summary: Intrinsic postzygotic isolation, caused by genetic incompatibilities between diverged parental genomes, typically results in reduced viability or fertility of interspecific hybrids. Dobzhansky-Muller interactions and chromosomal rearrangements have long been considered as major mechanisms behind intrinsic postzygotic isolation, but recent research suggests a more complex genetic basis involving overall sequence divergence and epigenetic changes.
COLD SPRING HARBOR PERSPECTIVES IN BIOLOGY
(2023)
Article
Cell Biology
Niki Vontzou, Yifan Pei, Jakob C. Mueller, Radka Reifova, Francisco J. Ruiz-Ruano, Stephen A. Schlebusch, Alexander Suh
Summary: In this article, the authors review the evolutionary history, genetic content, and expression of the germline-restricted chromosome (GRC) in songbirds, and discuss its involvement in genetic conflicts. They also explore the potential role of the GRC in songbird germline development and highlight several unresolved mysteries.
CURRENT OPINION IN GENETICS & DEVELOPMENT
(2023)
Article
Ornithology
Jiri Reif, Zdenek Vermouzek, Petr Vorisek, Dusan Romportl, Javier Rivas-Salvador, Federico Morelli
Summary: Forest and urban habitats in Czechia have the highest bird species richness, while cropland has the lowest. Grassland and other open habitats have higher species richness, although fewer than forests, and are similar to wetland.
Article
Ecology
Camille Sottas, Lucie Schmiedova, Jakub Kreisinger, Tomas Albrecht, Jiri Reif, Tomasz S. Osiejuk, Radka Reifova
Summary: By comparing the gut microbiota of two closely related nightingale species, researchers found that there were no significant differences in gut microbiota composition between sympatric and allopatric populations. Most of the variation in gut microbiota composition was attributed to individual differences. This suggests that changes in gut microbiota composition are unlikely to contribute to reproductive isolation in these passerine birds.
BMC ECOLOGY AND EVOLUTION
(2021)