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United States Department of Agriculture
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Effective Jan. 1, 2025, the U.S. National Plant Germplasm System will modify its SMTA acceptance policy to distinguish between propagative and non-propagative germplasm.
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USDA National Plant Germplasm System
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2.3.12
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Descriptor:
Downy mildew (DOWNY MILDEW)
Download list of accessions evaluated for this trait
Definition:
Percent of plants resistant to Downy mildew (Peronospora trifoliorum).
Crop:
ALFALFA
Category:
Disease descriptors
Status:
Crop Germplasm Committee approved
Data Type:
Numeric descriptor
Maximum Length:
5
Responsible Site:
Western Regional PI Station (
W6
)
Studies or environments
ALFALFA.DOWNYMILD.I7.83.STUT
350 Accessions
ALFALFA.DOWNYMILD.I7.84.STUT
120 Accessions
ALFALFA.DOWNYMILD.I7.85.STUT
162 Accessions
ALFALFA.DOWNYMILD.I7.86.STUT
101 Accessions
ALFALFA.DOWNYMILD.I7.88.STUT
148 Accessions
ALFALFA.DOWNYMILD.I7.90.STUT
143 Accessions
ALFALFA.DOWNYMILD.I7.92.STUT
49 Accessions
ALFALFA.DOWNYMILD.I8.83.STUT
350 Accessions
ALFALFA.DOWNYMILD.I8.84.STUT
120 Accessions
ALFALFA.DOWNYMILD.I8.85.STUT
162 Accessions
ALFALFA.DOWNYMILD.I8.86.STUT
101 Accessions
ALFALFA.DOWNYMILD.I8.88.STUT
148 Accessions
ALFALFA.DOWNYMILD.I8.90.STUT
143 Accessions
ALFALFA.DOWNYMILD.I8.92.STUT
49 Accessions
Distribution of Values for
Downy mildew (DOWNY MILDEW)
Range
Number of Accessions
0 - 8.9
671
8.9 - 17.8
325
17.8 - 26.7
236
26.7 - 35.6
171
35.6 - 44.6
107
44.6 - 53.5
67
53.5 - 62.4
44
62.4 - 71.3
17
71.3 - 80.2
2
80.2 - 89.1
3