Annual Progress Report on Malting Barley Research March, 2002

110
resistance. Some of the lines show good resistance to the apparent new stripe rust
virulence at Huancayo, Peru.
We are focusing our winter malting barley efforts on genotypes that do not require
vernalization. Results for our mapping lead us to hypothesize that in the development of
88ab536 there was either a crossover event leading to the separation of the genes that
determine cold tolerance and vernalization on chromosome 7 (5H) or that an allelic
architecture was created that leads to an epistatic down-regulation of the vernalization
requirement. These hypotheses will be elaborated on in our proposal for continued
funding. The immediate practical implication is that most of our winter malting barley
selections can be spring-sown. This would offer a safety net to growers, in the event of
extensive winter injury, and it could lead to the development of varieties with very broad
adaptation. The yield of some of the winter selections under spring-sown conditions is
competitive (Table 7). We hypothesize that the agronomic potential of these lines may
be limited by the malting quality donor (Morex, via 88Ab536). Accordingly, as will be
elaborated on in our proposal for continued funding, we propose to transfer winter
hardiness QTL alleles to more recent Midwestern malting quality varieties and thus raise
the bar of agronomic performance. Quality samples of the spring-sown winter malting
selections were submitted, but data have not been received, so the consistency of quality
expression across sowing dates is not known at this point.
The malting quality of winter selections grown under fall-sown conditions at Pendleton,
Pullman, and Aberdeen is shown in Table 6. For comparative purposes, we include the
malting data from analyses of the same sample by different labs. Of these selections,
STAB 7 is in accelerated seed increase in preparation for Plant Scale testing; STAB 7 and
STAB 47 are currently both in a second year of the AMBA Pilot program; and STAB 113
is in a second year of first level testing in the AMBA Pilot program. KAB 47 and KAB
51 drill strips were planted at Pendleton and Aberdeen in Fall, 2001 in preparation for
submission to the AMBA Pilot program.
A notable feature of many of the winter malting selections is low grain protein, and this
leads to lower than desired specs for other malt parameters. So, while much of the rest of
the barley research community struggles with ways to lower grain protein, we are
working on ways to increase it. In cooperation with S. Petrie and K. Rhinhart
(Pendleton) we initiated a series of management trials in the fall of 2001. We are
continuing with expanded versions of these trials this year and after this season, we will
be able to present a comprehensive data analysis and a management package. At this
point, it appears that we will be able to manage nitrogen (via split fall/spring
applications) in order to achieve target levels of grain protein and enzymatic properties.
However, the timing of the split applications will be critical, and there may be specific
requirements for specific genotypes.
Winter 6-row: 2001-2002 season
Germplasm development
Crosses are made at Corvallis and lines advanced to homozygosity through doubled
haploid production, and/or single seed descent. With the emphasis on facultative growth
habit, we are using SSD. With SSD, molecular markers can be used to indirectly select