One such example is programmed death marker-1 (PD-1), an inhibitory signaling receptor expressed on activated and regulatory T-cells.
Sequences for each marker were aligned using the program MUSCLE [ 41].
Models of DNA sequence evolution for each marker were selected with the program jModeltest v0.1 [ 132], using the AIC criterion.
If a reflective marker was not triangulated, the program reported an error message that indicated that the reflective marker was not captured by at least two cameras.
Thus, the Pi9-Pro marker is advantageous for MAS breeding programs targeting these resistance genes, especially for large-scale population screening.
The trees resulting from every bootstrap run, for every phylogenetic marker, were summarized using the consense program in the PHYLIP package (Felsenstein 1989) with default settings (extended majority rule).
Screening for dieback resistance with this molecular marker is now part of our breeding program.
For estimating genetic diversity among accessions in breeding programs, SSR markers are an essential tool, but for the species that have meager number of these markers available, their development is a challenging aspect.
STR markers are also used for introgression programs for trait improvement, for example Soltol QTLs in rice.
In crop improvement programs, molecular markers are employed for (1) studying the relationship among lines [ 35], (2) QTL mapping in breeding populations [ 36], (3) marker-assisted foreground- and background selection [ 37], and (4) genomic selection [ 38, 39].
