Exact(4)
Genetically, we are crossing Suweon 542 with indica germplasm that has high dormancy to alleviate pre-harvest sprouting.
Seed of wild-produced cross types had high dormancy, thus reducing their germination.
Based on typical descriptions of aus and indica, it would seem that increased tolerance to cold, high dormancy, easy shattering, and lack of photoperiod sensitivity (though this trait is found in aus) may have evolved in U.S. weedy rice populations.
Similar to our results, but with a related metric, a low dormancy: mortality ratio was calculated for canola crop wild hybrids, while a high dormancy: mortality ratio was found in its wild relative (Adler et al. 1993).
Similar(56)
Where detected, differences between reciprocal pairs with equivalent crop allele percentages at each removal revealed that (i) crop-produced cross types displayed the highest mortality, (ii) F1-produced cross types showed the highest germination, and (iii) wild-produced cross types had the highest dormancy (Table 4).
Cross types that exhibit higher dormancy will have fewer seedlings emerging in a given season; however, there could also be recruitment from the seed bank (Cummings et al. 2002), allowing hybrids to play a role in sunflower metapopulation dynamics (Alexander et al. 2012).
The species evolved on mainland Australia [ 1] and its wind-dispersed seeds are thought to be capable of traversing long distances over oceans due to their high physical dormancy [ 2].
In a follow up study [ 52], the VP-1B locus was validated in a white-grained Chinese landrace Wanxianbaimaizi (high seed dormancy and PHS tolerance) using SSR markers and a gene-specific primer Vp1.
> Lettuce seeds are frequently primed to break high-temperature dormancy, but the priming treatment reduces the shelf-life under commercial storage conditions.
Either P. rhoeas was the only taxon for which 20/10 °C (summer in the cold climate) was high enough for dormancy reduction, or the other taxa required longer times than 90 d for dormancy reduction at that temperature.
In the malthouse, seeds must germinate rapidly and completely upon imbibition of water, and a high level of dormancy after harvest is economically undesirable (Carn, 1980; Ullrich et al., 1993, 1997).
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