Wheat heading time is primarily governed by two loci: VRN-1 (response to vernalization) and PPD-1 (response to photoperiod). Five sets of near-isogenic lines (NILs) were studied with the aim of investigating the effect of the aforementioned genes on wheat vegetative period duration and 14 yield-related traits. Every NIL was sown in the hydroponic greenhouse of the Institute of Cytology and Genetics, SB RAS. To assess their allelic composition at the VRN-1 and PPD-1 loci, molecular markers were used. It was shown that HT in plants with the genotype was reduced by 29 and 21 days ( < 0.001) in comparison to HT in plants with the and the genotypes, respectively. In our study, we noticed a decrease in spike length as well as spikelet number per spike parameter for some NIL carriers of the Vrn-A1a allele in comparison to carriers of the allele. PCA revealed three first principal components (PC), together explaining more than 70% of the data variance. Among the studied genetic traits, the and alleles showed significant correlations with PCs. Regarding genetic components, significant correlations were calculated between PC3 and (-0.26, < 0.05) and (0.57, < 0.05) alleles. Thus, the presence of the allele affects heading time, while is associated with plant height reduction.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11174496 | PMC |
| http://dx.doi.org/10.3390/plants13111453 | DOI Listing |
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