Results 61 to 70 of about 7,530 (235)

Captive Breeding of the Chinese Alligator Reduces Inbreeding but Increases Genetic Load

Integrative Zoology, EarlyView.
Captive breeding of the Chinese alligator successfully reduced genomic inbreeding but increased the burden of deleterious mutations. Genomic analyses indicate that managing both genetic diversity and genetic load is essential for the long‐term conservation of this critically endangered species.
Yihang Fan, Tao Pan, Nicolas Dussex, Tianming Lan   +3 more
wiley   +1 more source

Tipping the Scales Using Cryopreservation: Modelling the Genetic Value and Management Potential of Integrated Cryopreservation for Threatened Ex‐Situ Pupfish Populations

Animal Conservation, EarlyView.
This graphical abstract depicts the number of additional fish that would be required to achieve 90% genetic diversity for endangered pupfish species housed in EAZA collections, with or without the use of cryopreserved material. ABSTRACT Zoos and aquaria must retain genetic diversity for the species they house if the populations are to remain viable ...
James Edward Brereton, Susan L. Walker, Andrew Mooney, Pedro Machado, Elmar Fienieg, Elena Hunter   +5 more
wiley   +1 more source

A successful in vitro fertilization outcome in a hermaphrodite male

International Journal of Gynecology &Obstetrics, Volume 169, Issue 1, Page 424-425, April 2025.
Shima Elbakhit M. E. Albasha, Sami Saadi Al‐Said, Haitham Tharwat M. H. El Bardisi   +2 more
wiley   +1 more source

Sperm Head–Tail Coupling Apparatus Diversity and Common Themes Among Species

Andrology, EarlyView.
ABSTRACT Background A stable connection between the sperm head (containing the nucleus and acrosome) and tail (containing the axoneme, mitochondrial sheath, and periaxonemal structures) is critical for fertility. This connection is mediated by a series of nuclear, cytoplasmic, and centriole components that make up the head–tail coupling apparatus (HTCA)
Danielle B. Buglak, Brian J. Galletta, Nasser M. Rusan   +2 more
wiley   +1 more source

Spatiotemporal Expression of ARRDC5 in Mammalian Spermatogenesis

Andrology, EarlyView.
ABSTRACT Background Spermiogenesis is the final phase of sperm development during which haploid round spermatids transform into specialized spermatozoa and occurs across distinct stages of sperm production in the seminiferous epithelium. Abnormalities in this process lead to malformations and an inability of sperm to fertilize eggs.
LeeLa D. Robinson, Jon M. Oatley
wiley   +1 more source

Male Mice Heterozygous for Protamine 1 and Protamine 2 Are Infertile, Displaying Sperm Damage and Retention of Protamine 2 Precursors, Transition Proteins, and Histones

Andrology, EarlyView.
ABSTRACT Background During spermiogenesis, protamines (PRMs) replace histones to hypercondense and protect sperm DNA. Rodents and primates express two PRMs (PRM1 and PRM2). Alterations of species‐specific PRM ratios are associated with sub‐ or infertility in mice and humans.
Gina Esther Merges, Christoph Wiesejahn, Mar Domingo‐Lopez, Simon Schneider, Andjela Kovacevic, Lena Arévalo, Hubert Schorle   +6 more
wiley   +1 more source

The impact of androgenesis in vitro factors on wheat double haploid’s traits

Фактори експериментальної еволюції організмів, 2013
Aims. The influence of androgenesis in vitro factors on quantitative characters has been studied on winter bread wheat double haploids-lines differing in dwarfing genes. Methods.
I. I. Motsny, M. P. Kulbida, I. S. Zambriborsch, E. I. Lobanova, G. A. Chebotar, S. V. Chebotar, M. S. Boyko   +6 more
doaj  

Chromosome doubling of microspore-derived plants from cabbage (Brassica oleracea var. capitata L.) and broccoli (Brassica oleracea var. italica L.)

Frontiers in Plant Science, 2015
Chromosome doubling of microspore-derived plants is an important factor in the practical application of microspore culture technology because breeding programs require a large number of genetically stable, homozygous doubled haploid plants with a high ...
Suxia eYuan, Yanbin eSu, Yumei eLiu, Zhansheng eLi, Zhiyuan eFang, Limei eYang, Mu eZhuang, Yangyong eZhang, Honghao eLv, Peitian eSun   +9 more
doaj   +1 more source

A Review on Haploid and Double Haploids in Ornamental Plants

Current Research in Agriculture and Farming, 2021
Sporophyte plants with many gametophytic chromosomes are called haploid plants. These plants can be produced naturally or through in vitro or in vivo induction techniques. Double haploid (DH) can be obtained by doubling the number of haploid chromosomes spontaneously or artificially.
openaire   +1 more source

A CCNA1 Missense Variant Associated With Chromatid Non‐Disjunction in Abnormal‐Headed Sperm and Male Infertility

Andrology, EarlyView.
ABSTRACT Background Macrozoospermia is a rare form of teratozoospermia characterized by tetraploids, large‐headed spermatozoa with multiple flagella, usually caused by bi‐allelic AURKC mutations. The etiology of atypical phenotypes with a lower proportion of large headed spermatozoa and single flagella however often remains unresolved.
Aurore Perrin, Frédéric Morel, Zeina Wehbe, Cynthia Frapsauce, Nadia Gueganic, Corinne Tous, Séverine Commet, Laura Dijols, Audrey Basinko, Nathalie Douet‐Guilbert, Célia Tebbakh, Zine‐Eddine Kherraf, Pierre F. Ray, Charles Coutton, Guillaume Martinez   +14 more
wiley   +1 more source