We consider recombinant inbred lines obtained by crossing two given homozygous parents and then applying multiple generations of self-crossings or full-sib matings. The chromosomal content of any such line forms a mosaic of blocks, each alternatively inherited identically by descent from one of the parents. Quantifying the statistical properties of such mosaic genomes has remained an open chall...

In Arabidopsis thaliana ribosomal RNA genes (rRNA genes or rDNA) are grouped in two nucleolus organizer regions(NORs) that together comprise approximately 6% of the genome. The map positions of the NORs relative to other genetic markers are unknown. It was found that the restriction endonuclease Hindlll cuts once in some but not all rRNA genes to yield strain-specific RFLPs of 100-700 kb that c...

Resolving the genetic complexity of heritable phenotypic variation is fundamental to understanding the mechanisms of evolution and the etiology of human disease. Trait variation among isolates from genetically efficient model organisms offers the opportunity to dissect genetic architectures and identify the molecular mechanisms of causation. Here we present a genetic analysis of loss of sensiti...

Corn borers are the most important pest affecting maize. Resistance to corn borer attack may compromise plant fitness being detrimental for some agronomic traits such as yield. Against of this pest, cell wall-bound hydroxycinnamates have been previously described a possible defense mechanism. In study, characterization and quantification was performed in subset Recombinant Inbred Lines (RILs) f...

maize improvement for high temperature tolerance requires the reliable assessment of parental inbred lines and their combinations. fifteen maize inbred lines were evaluated during 2007 and 2008 in shushtar city (khuzestan province). the inbred lines were planted at two dates: 6 july, to coincide heat stress with pollination time; and 27 july, as normal planting to avoid high temperature during ...

In order to study the adaptation of rice lines to drought stress and to identify the tolerant and sensitive lines, 150 pure lines in RIL population each derived from a cross between two Iranian rice varieties Gharib and Sepidroud were investigated. Augment design based on the randomized complete block design (RCBD) was used with 6 check cultivars and 4 replications in 2013-2014 growing season. ...