نتایج جستجو برای: doubled haploids

تعداد نتایج: 11971  

Journal: :Journal of experimental botany 2003
M Kuzuya K Hosoya K Yashiro K Tomita H Ezura

The major cause of powdery mildew in melons (Cucumis melo L.) is the fungus Sphaerotheca fuliginea. There are several cultivar- and season-specific races of this fungus. In order to control powdery mildew, it is important to introduce resistance to fungal infection into new cultivars during melon breeding. Haploid breeding is a powerful tool for the production of pure lines. In this study, it w...

Journal: :Current Biology 2002
Matthew Lord Fumika Inose Takatoshi Hiroko Toshihiro Hata Atsushi Fujita John Chant

Bud-site selection in yeast offers an attractive system for studying cell polarity and asymmetric division. Haploids divide in an axial pattern, whereas diploids divide in a bipolar pattern. AXL1 is expressed in haploids but not diploids, and ectopic expression of AXL1 in diploids converts their bipolar budding pattern to an axial pattern. How Axl1 acts as a switch between the bipolar and axial...

Journal: :Physics Letters B 2011

Journal: :Journal of High Energy Physics 2014

Journal: :Canadian Journal of Mathematics 2018

Journal: :BMC Plant Biology 2021

Abstract Background Microspore embryogenesis is potentially the most effective method of obtaining doubled haploids (DH) which are utilized in breeding programs to accelerate production new cultivars. However, regeneration albino plants significantly limits exploitation androgenesis for DH cereals. Despite many efforts, precise mechanisms leading development regenerants have not yet been elucid...

2013
Xiaowei Xu Liang Li Xin Dong Weiwei Jin Albrecht E. Melchinger Shaojiang Chen

Production of maternal haploids via a male inducer can greatly accelerate maize breeding and is an interesting biological phenomenon in double fertilization. However, the mechanism behind haploid induction remains elusive. Segregation distortion, which is increasingly recognized as a potentially powerful evolutionary force, has recently been observed during maternal haploid induction in maize. ...

Journal: :Genetics 1999
R Korona

Mutator strains of yeast were used to accumulate random point mutations. Most of the observed changes in fitness were negative and relatively small, although major decreases and increases were also present. The average fitness of haploid strains was lowered by approximately 25% due to the accumulated genetic load. The impact of the load remained basically unchanged when a homozygous diploid was...

Journal: :Molecular biology of the cell 2000
M Segal K Bloom S I Reed

In budding yeast, spindle polarity relies on a precise temporal program of cytoplasmic microtubule-cortex interactions throughout spindle assembly. Loss of Clb5-dependent kinase activity under conditions of attenuated Cdc28 function disrupts this program, resulting in diploid-specific lethality. Here we show that polarity loss is tolerated by haploids due to a more prominent contribution of mic...

Journal: :Genome 2004
M R Ercolano D Carputo J Li L Monti A Barone L Frusciante

The objectives of this study were to assess the genetic variability of haploids (2n = 2x = 24) extracted from tetraploid Solanum tuberosum through 4x x 2x crosses with Solanum phureja. Molecular and phenotypic analyses were performed to fingerprint the genotypes used and to evaluate their potential use in breeding programs. AFLP analysis revealed the presence of specific bands derived from the ...

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