Base regions by clicking and dragging.
Bph6 and Bph9, which were both explored from the traditional tropical indica cultivars, could be the more adopted genes in rice BPH-resistance pyramiding breeding programs for less linkage drag of unbeneficial traits than those from the wild species.
To date, this wealth of germplasm is largely untapped owing to the difficulty of identifying agronomically important genes and transferring these genes into cultivated rice without any linkage drag or deleterious traits.
Our previous research suggested that the lb5b and lb11b QTL appear to be associated with linkage drag for several traits, including maturity, fruit size, and fruit yield (Brouwer and St.Clair 2004).
It has been suggested that when using Sahara as a breeding parent, there may be linkage drag of unfavourable traits together with the 4H allele, or pleiotropic effects of the 4H tolerance allele in different backgrounds [ 26, 27].
Both in this case, and in the case of homologous QTL erucic acid content on chromosomes A08 and C03, we demonstrate that selective sweeps can also incorporate additional, functionally-related genes for which alleles in strong LD may have either a positive or negative influence (linkage drag) on target traits (e.g. GSL content, fatty acid composition or oil content).
The barley exome kit has been used to differentiate between markers of H. vulgare L. and H. bulbosum L.; H. bulbosum L. is a wild species that has superior pathogen resistance and tolerance compared to the domestic species and the two can be crossed to improve the domesticated crop, however negative linkage drag on production traits has hampered its use in elite barley lines.
In the past two decades, while numerous traditional or molecular breeding efforts have been undertaken to improve tomato chilling tolerance, significant successful progress has not been made due to the complexity of chilling tolerance traits, linkage drag that affects yield and quality, and the lack of quantifiable physiological parameters related to chilling tolerance.
We may listen to Mozart and celebrate Einstein, yet we drag along some truly awful traits.
In these MAS, it is necessary not only to perform background selection by DNA markers distributed in non-target chromosomal regions, but the size of the introgressed chromosome segment should be minimized to avoid unfavorable trait association (linkage drag).
