Publications by authors named "A J Lukaszewski"
Article Synopsis
- The Ph1 locus in polyploid wheat prevents crossing over between homoeologous chromosomes during meiotic metaphase I, maintaining bivalent behavior.
- It also influences the pairing and crossing over of homologous chromosomes, and its effects can vary based on the number of doses present.
- Results showed that with a single dose of Ph1, crossover rates were 37% higher than with two doses and 46.4% lower than with no doses, indicating Ph1 operates in a dosage-dependent manner.
Article Synopsis
- The cytoplasm of wheat plays a crucial role in inducing male sterility and haploidy, influencing various aspects of plant fertility and development.
- While the main fertility restorer locus on chromosome arm 1BS shows little variation, other genes may also impact the interactions between the nuclear and mitochondrial genomes, affecting traits from pollen competition to seed size.
- The study reveals complex cytoplasmic-nuclear interactions that can lead to various fertilization outcomes, and further genetic analysis is needed to better understand the suppressors and enhancers involved in maternal haploid production in wheat.
Status hierarchies are ubiquitous across cultures and have been over deep time. Position in hierarchies shows important links with fitness outcomes. Consequently, humans should possess psychological adaptations for navigating the adaptive challenges posed by living in hierarchically organised groups.
View Article and Find Full Text PDFNumerous studies have shown that under a limited water supply, a larger root biomass is associated with an increased above-ground biomass. Root biomass, while genetically controlled, is also greatly affected by the environment with varying plasticity levels. In this context, understanding the relationship between the biomass of shoots and roots appears prudent.
View Article and Find Full Text PDFC-banding visualizes regions of chromosomes containing constitutive heterochromatin. It creates distinct patterns along the chromosome length and allows precise chromosome identification if C-bands are present in sufficient numbers. It is performed on chromosome spreads generated from fixed material, usually root tips or anthers.
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