نتایج جستجو برای: haploidy

تعداد نتایج: 4039  

1995
SARAH PERIN OTTO JANE CLAIRE MARKS

According to the ‘masking hypothesis’, diploids gain an immediate fitness advantage over haploids because diploids, with two copies of every gene, are better able to survive the effects of deleterious recessive mutations. Masking in diploids is, however, a double-edged sword: it allows mutations to persist over time. In contrast, deleterious mutations are revealed in haploid individuals and are...

2015
Jose M. Seguí-Simarro

Doubled haploid (DH) technology is a powerful tool in plant breeding to reduce the time and costs needed to produce pure lines, the cornerstone of hybrid seed production. This biotechnological alternative to classic methods allows for a reduction of the typical 7–8 inbreeding generations needed to fix a hybrid genotype to only one in vitro generation. It is therefore much faster and cheaper, be...

Journal: :Computers and Artificial Intelligence 1999
Pedro Isasi Viñuela Araceli Sanchis José M. Molina López Antonio Berlanga

In this paper the study of diploidy is introduced like an important mechanism for memory reinforcement in arti cial environments where adaptation is very important For this study it has been simulated an ecosystem of birds The individuals of this ecosystem are able to geneti cally learn the best behaviour for survival Critical changes happening in the environmental conditions require the presen...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1986
F Zampetti-Bosseler J Schweizer E Pays L Jenni M Steinert

The parasitic flagellate Trypanosoma brucei undergoes a series of morphologic and metabolic changes during its passage in the digestive organs of its insect vector, a Glossina or tsetse fly. This morphogenesis ends by the differentiation, in the salivary gland of the fly, of the metacyclic form, which will be transmitted in the bloodstream of the mammalian host. On the basis of DNA microfluorom...

Journal: :Frontiers in bioscience : a journal and virtual library 2001
J M Chessells

Although intensive chemotherapy has improved event-free survival for most children with lymphoblastic leukaemia there remain up to 10% who have not benefited from this approach. These include infants, children with Ph1 positive leukaemia, with near-haploidy, and slow remitters in most of whom event free survival remains below 40%. Evaluation of the benefits of Bone Marrow Transplantation in hig...

Journal: :Journal of animal reproduction & biotechnology 2022

Journal: :Journal of Cereal Research 2023

Wheat crop has a major role in current food system and global security. Beyond doubt, wheat production increased substantially, however, there been increase world’s population also, thereby, leading to supply demand. To fulfil this demand, science today needs more efficient new technologies for breeding with faster pace. Conventional is time consuming as it requires the selfing from F1 generati...

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