to catechin and proanthocyanidin flavanol pigments [25, 26] inside the testa (seed coat) of wheat can also be related with seed dormancy [1, 22, 27]. R genes genetically manage testa colour in wheat and are mapped to the distal area of homeologous group 3 chromosomes [28]. R genes act as transcriptional activators with the flavonoid synthesis pathway genes chalcone synthase (CHS), chalcone isomerase (CHI), flavanone 3-hydroxylase (F3H), and dihydroflavonol c-Rel MedChemExpress 4-reductase (DFR) [29]. Myb-type transcription factor genes (Tamyb10-A1, Tamyb10-B1 and Tamyb10-D1), that are located to the same genetic intervals as the R loci, control the red grain colour of wheat by up-regulating the flavonoid biosynthesis pathway structural genes DFR, CHI, F3H, and CHS [1, 29]. Embryo-imposed dormancy is precisely regulated by seed developmental processes [7]. ABA and its crosstalk with GA and auxin play fundamental roles in regulating embryo-imposed dormancy [1, 7]. Several genes involved in ABA biosynthesis and IDO1 Gene ID signal transduction happen to be identified to possess roles in seed dormancy in diverse species [30]. The Viviparous-1 (Vp-1)/Abscisic Acid Insensitive3 (ABI3) gene, which encodes a dormancy related-transcription issue and is involved in ABA signal transduction, is an crucial regulator of late embryogenesis in maize and late embryo improvement in wheat [313]. The TaVp-1 loci are situated around 30 cM proximal to the R genes on the group three chromosomes of wheat [29, 34, 35]. A variety of other ABA synthesis and signal transduction pathway genes like wheat homolog of Mother of FT and TFL1 (TaMFTlike/TaPHS1), ABA-induced Wheat Plasma Membrane 19 (PM19-A1/A2) [36], wheat homolog of cytochrome P450 family members 707 subfamily A polypeptide 1 gene (TaCYP707A1) and Delay of Germination 1 (TaDOG1) have already been located linked with seed dormancy [2, 372]. Numerous studies demonstrated that epigenetic modifications via DNA [43] and histone methylation [44, 45] can also influence seed dormancy and PHS resistance [5]. Histone deacetylases have also been discovered to modulate seed germination and ABA-induced gene expression in Arabidopsis [46, 47] and have been found to be modulated by ABA in barley [48]. Lately, the role of ARGONAUTE genes of ARG4_9 class, which play key roles in DNA silencing in plants via the RNA dependant DNA methylation (RdDM) pathway, was explored in wheat and barley [5, 43]. An association of DNA methylation and polymorphism in ARGONAUTE gene AGO802B on chromosome 3B and PHS resistance was demonstrated in embryos of PHS resistant and susceptible cultivars of wheat [5]. All wheat chromosomes possess quantitative trait loci (QTLs) related with PHS resistance, resulting in aDhariwal et al. BMC Genomics(2021) 22:Page 3 oftotal 110 loci in wheat [6]. QTLs happen to be repeatedly reported on groups 3 and four chromosomes from unique wheat genotypes [6], including the significant QTLs QPhs. pseru-3A/TaPHS1 on chromosome arm 3AS [42, 49, 50] and Phs1 on chromosome arm 4AL [51, 52]. Along with genes/QTLs talked about above, causal/candidate genes from some of the PHS related QTLs have also been cloned/identified for instance mitogen-activated protein kinase kinase 3 (TaMKK3-A) for Phs1 QTL on chromosome arm 4AL [52], TaSdr-A1a [53], and TaSdr-B1 [7]. In wheat, red-grained cultivars are typically more PHS resistant than those which might be white-grained [34]. Working with genealogical analysis of 148 red-grained and 63 whitegrained North-American spring wheat cultivars wit
