The ability of plants to identify an optimal flowering time is critical for ensuring the production of viable seeds. The main environmental factors that influence the flowering time include the ambient temperature and day length. In wheat, the ability to assess the day length is controlled by photoperiod (Ppd) genes. Due to its allohexaploid nature, bread wheat carries the following three Ppd-1...

To understand better the biochemistry and underlying genetic control of postharvest discolouration in lettuce, an F7 recombinant inbred population (Saladin x Iceberg) was grown field trials phenotyped. We identified two distinct phenotypes, pinking browning, which were negatively correlated at phenotypic level located six QTL associated with five browning plus total could not be attributed to e...

OBJECTIVE AND METHODS This paper proposes an inegrative two-stage genome-wide search for pairwise epistasis on expression quantitative trait loci (eQTL). The traits are clustered into multi-trait complexes that account for correlations between them that may result from common epistasis effects. The search is done by first screening for epistatic regions and then using dense markers within the i...

It has been suggested that the collaborative cross, a large set of recombinant inbred strains derived from eight inbred mouse strains, would be a powerful resource for the dissection of complex phenotypes. Here we use simulation to investigate the power of the collaborative cross to detect and map small genetic effects. We show that for a fixed population of 1,000 individuals, 500 RI lines bred...

Small RNAs (sRNAs) are epigenetic regulators of eukaryotic genes and transposable elements (TEs). Diverse sRNA expression patterns exist within a species, but how this diversity arises is not well understood. To provide window into the dynamics maize patterning, mRNA transcriptomes were examined in two related Zea mays recombinant inbred lines (RILs) their parents. Analysis these RILs revealed ...

The seed storage proteins (SSPs) of cultivated wheat (Triticum aestivum and T. durum), namely, glutenin and gliadin, impart viscoelastic properties to bread dough, making wheat well suited for bread-making. Extensive studies on wheat SSPs have been carried out and revealed genetic diversity among wheat cultivars. Here, we review the studies of SSPs from more exotic species in the Triticeae trib...

BACKGROUND Fusarium head blight (FHB) caused by Fusarium graminearum not only causes severe losses in yield, but also reduces quality of wheat grain by accumulating mycotoxins. Breeding for host plant resistance is considered as the best strategy to manage FHB. Resistance in wheat to FHB is quantitative in nature, involving cumulative effects of many genes governing resistance. The poor underst...

Spikelet number per spike (SNS) is the primary factor that determines wheat yield. Common breeding reduces genetic diversity among elite germplasm resources, leading to a detrimental effect on future production. It is, therefore, necessary explore new resources for SNS increase A tetraploid landrace “Ailanmai” × wild emmer recombinant inbred line (RIL) population was used construct map using 55...

For the first time, using chromosome engineering of durum wheat, the underlying genetic determinants of a yield-improving segment from Thinopyrum ponticum (7AgL) were dissected. Three durum wheat-Th. ponticum near-isogenic recombinant lines (NIRLs), with distal portions of their 7AL arm (fractional lengths 0.77, 0.72, and 0.60) replaced by alien chromatin, were field-tested for two seasons unde...