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dormant line

Catalogue: GRDC Final Reports
The project has provided technological support to improve sprouting resistance in wheat by Australian wheat breeders by annual phenotyping of advanced breeding lines, development of improved screening technologies including molecular markers, and germplasm with improved sprouting resistance based on grain dormancy... Given that grain dormancy is a difficult trait to manipulate due to interactions with both maturity and the environment, molecular markers tightly linked to the major QTLs are a high priority... Results from dormant x non-dormant crosses and reciprocal crosses indicate that 2-3 QTLs or genes are involved in dormancy in white-grained as well as red-grained wheat genotypes whilst the patterns of phenotype expression are consistent with a model involving an interaction between an embryo factor (sensitivity to abscisic acid (ABA) that declines during after-ripening, most probably the 4A QTL) and at least one other factor that is expressed in the seed coat...
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Catalogue: GRDC Final Reports
The results suggest that breeding programs could use CEC to characterise fixed lines for grain dormancy, perhaps during the off-season to complement field evaluation in the main growing season... The objective of the study was to investigate the ability to characterise and screen for grain dormancy using grain grown under CEC, utilising an extended photoperiod... The results were achieved within a relatively short time period (18 months from production of the dormant x non-dormant F1 crosses, screen segregating populations for grain dormancy and derive F4:5 lines)...
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