Evaluation of genetic markers for prediction of preharvest sprouting tolerance in hard white winter wheats
نویسندگان
چکیده
Preharvest sprouting of wheat results in significant financial loss at all steps in the production and marketing chain. Due to its intermittent nature in many wheat-growing regions, direct selection for tolerance to preharvest sprouting is difficult. DNA markers linked to genes conditioning tolerance offer a more consistent and reliable approach to genetic improvement in tolerance. This investigation assessed the value of previously identified markers linked to quantitative trait loci contributing to tolerance, across multiple genetic backgrounds. A significant contribution to tolerance was demonstrated for QPhs.pseru-3AS, previously identified from the hard white winter wheat ‘Rio Blanco’. Marker alleles for this locus were associated with enhanced tolerance in three of four investigated populations. In addition, positive contributions of QPhs.pseru-2B1 and QPhs.pseru-2B2 also were documented. Simultaneous selection for putative marker alleles at two independent loci resulted in significantly higher mean tolerance scores. DNA markers linked to loci contributing to variation in preharvest sprouting tolerance offer an efficient and effective alternative to direct phenotypic selection.
منابع مشابه
Evaluation of Genetic Diversity in Japanese and English White Quail Populations Using Microsatellite Markers
The Japanese and English White quails are widespread strains and belongs to the Galliformes order, Phasianidae family, Coturnix genus and Japonica species. These birds are likely to be well-adapted to the hard conditions and resistance to diseases as it has attained economic importance as an agricultural species. In the current study, the genetic variation of Japanese and English White quail ...
متن کاملThe Evaluation of Genomic Relationships and Diversity of Wild and Cultivated Wheats Possessing A Genome in Different Ploidy Levels Using SSR Markers
Genomic relationships and diversity of 37 wild and cultivated wheat (Triticum sp.) possessing A genome include four T. urartu (Au), thirteen wild einkorn (Am), four cultivated einkorn (Am), seven durum wheat (BBAuAu), three T. zhukovskyi (AtAtAmAmGG) and six com...
متن کاملGenome-Wide Association Mapping for Tolerance to Preharvest Sprouting and Low Falling Numbers in Wheat
Preharvest sprouting (PHS), the germination of grain on the mother plant under cool and wet conditions, is a recurring problem for wheat farmers worldwide. α-amylase enzyme produced during PHS degrades starch resulting in baked good with poor end-use quality. The Hagberg-Perten Falling Number (FN) test is used to measure this problem in the wheat industry, and determines how much a farmer's whe...
متن کاملIndependent mis-splicing mutations in TaPHS1 causing loss of preharvest sprouting (PHS) resistance during wheat domestication.
Preharvest sprouting (PHS) is one of the major constraints of wheat production in areas where prolonged rainfall occurs during harvest. TaPHS1 is a gene that regulates PHS resistance on chromosome 3A of wheat, and two causal mutations in the positions +646 and +666 of the TaPHS1 coding region result in wheat PHS susceptibility. Three competitive allele-specific PCR (KASP) markers were developed...
متن کاملQTL mapping for benzoxazinoid content, preharvest sprouting, α-amylase activity, and leaf rust resistance in rye (Secale cereale L.)
Mapping population of recombinant inbred lines (RILs) representing 541 × Ot1-3 cross exhibited wide variations of benzoxazinoid (BX) content in leaves and roots, brown rust resistance, α-amylase activity in the grain, and resistance to preharvest sprouting. QTL mapping of major BX species using a DArT-based map revealed a complex genetic architecture underlying the production of these main seco...
متن کامل