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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
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| 0 | GSHO 196 | vrs1.a | Hordeum vulgare L. subsp. vulgare | Colorado, United States | NSGC |  | | 1994 | DONATED | 05/1994 | | | | | Genetic material | Alleles at this complex locus modify development of the lateral spikelets and the associated lemma awn. The vrs1.a allele (v gene) is present in most six-rowed cultivars and produces well-developed lateral spikelets. The lemma awn of lateral spikelets will vary from 3/4 to nearly as long as those of central spikelets, depending upon alleles present at other loci. The Vrs1.b allele (V gene, distichon) is present in many two-rowed cultivars and reduces lateral spikelets to sterile bracts with a rounded tip. The Vrs1.t allele (Vt gene, deficiens) causes an extreme reduction in the size of lateral spikelets. The lr or vlr (vrs1.c) gene in Nudihaxtoni and Bozu types will not recombine with the vrs1.a allele and produces phenotypes similar to the Vrs1.d allele (Vd gene) of Svanhals. The series of induced mutants in two-rowed barley called hex-v and Int-d mutants differ in the size of lateral spikelets, but they interact with the vrs1.a allele as incomplete dominants. Many heterozygous combinations with vrs1.a have a pointed tip on the lemma of sterile lateral spikelets. Alleles at the int-c (intermedium spike-c) locus modify lateral size in the presence of vrs1.a, Vrs1.b, and Vrs1.d, but not when Vrs1.t is present. Inheritance: A multiple allelic series, incomplete dominant allele interactions based on the size and shape of lateral spikelets. Located in chromosome 2HL, about 30.5 cM distal from the eog (elongated outer glume) locus. Previous nomenclature and gene symbolization:Two-row vs six-row=Zz. Six-row vs two-row=Aa. Two-row=D. Six-row vs two-row=Vv. Six-row vs two-row (distichon) vs two-row (deficiens)=A,as,af. Redcd lateral spikelet append. on the lemma=lr. Allelic series v,Vd,V,Vt. Hex. mut. Intermed. spike-d=Int-d. Reduced lat. spike. append. on lemma-vlr. Mut.events:vrs1.a ... vrs1.o(v1b) in New Golden.Mut. used for descr.:vrs1.a...(GSHO 1907). | 1510659 | GSHO 196 |
| 1 | GSHO 346 | Vrs1.d | Hordeum vulgare L. subsp. vulgare | Colorado, United States | NSGC |  | | 1994 | DONATED | 05/1994 | | | | | Genetic material | Plants homozygous for Vrs1.d have more lateral kernels than those with Vrs1.b (V), which is the common allele in two-rowed barley. Homozygosity for the Vrs1.d allele and the int-c.b (formally i) allele at the int-c (intermedium-c) locus prevents the development of ovules and awns in lateral spikelets. The Vrs1.d allele interacts with the Int-c.a (formally l) allele to cause development of a few fertile lateral spikelets. Presence of the Int-c.h (formally lh) allele contributes to a greater number of lateral kernels than Int-c.a. Inheritance: A partially dominant allele in the multiple allelic series at the vrs1 (six-rowed spike 1) locus. Located in chromosome 2HL, about 15.4 cM proximal from the Gth (toothed lemma locus, and 30.5 cM f from the eog (elongated outer glume) locus. Previous nomenclature and gene symbolization: Two-rowed barley of Hordeum distichon=Vd. Renamed Vrs1.d based on allelism tests. Mutational events: Vrs1.d or Vd in Svanhals (PI 5474). Mutant used for description and seed stock: Vrs1.d or Vd in Svanhals (GSHO 346). | 1512104 | GSHO 346 |
| 2 | GSHO 684 | Vrs1.t | Hordeum vulgare L. subsp. vulgare | Utah, United States | NSGC |  | | 1994 | DEVELOPED | | | | | | Genetic material | Plants homozygous for Vrs1.t (Vt) allele always have a deficiens phenotype regardless of the allele present at the int-c (intermedium-c) locus in chromosome 4. Deficiens is characterized by the extreme reduction in size of the lateral spikelet. The Vrs1.t allele in Engleawnless does not recombine with the Lks1.a allele at the Lks1 (awnless) locus because a short paracentric inversion is present in this stock. Inheritance: The Vrs1.t allele is the most dominant allele in the multiple allelic series at the vrs1 (six-rowed spike 1) locus, but interacts as an incomplete dominant with some alleles. Located in chromosome 2HL, about 15.4 cM distal from the Gth (toothed lemma) locus, and 30.5 cM distal from the eog (elongated outer glume) locus. Previous nomenclature and gene symbolization: Hordeum deficiens=Vt. Renamed Vrs1.t based on allelism tests. Mutational events: Vrs1.t or Vt in White Deficiens (CIho 7316). Mutant used for description and seed stocks: Vrs1.t or Vt in White Deficiens (GHSO 684); Vrs1.t in Bowman (PI 483237)*8(GSHO 1909). | 1512235 | GSHO 684 |