| 0 | GSHO 1764 | int-b.3 | Hordeum vulgare L. subsp. vulgare | Skåne län, Sweden | NSGC |  | | 1996 | DEVELOPED | | | 58.98333300, 13.50000000 | | | Genetic material | The spike appears similar to the six-rowed spike, but developmental irregularities occur commonly in the lower portion of the spike. All lateral spikelets are reduced in size, and the lemma awn is short or reduced to a pointed tip. Commonly, only lateral spikelets in the middle of the spike set seed. Mutant plants have reduced vigor and tillering. Inheritance: Monofactorial recessive. Located in chromosome 5HL [7L], near the raw1 (smooth awn 1) locus based on linkage drag. Previous nomenclature and gene symbolization: None. Mutational events: int-b.3, -b.6 in Bonus; int-b.75 in Bonus. Mutant used for description and seed stocks: int-b.3 in Bonus (GSHO 1764); int-b.3 in Bowman (PI 483237)*7 (GSHO 2129). | 1006044 | GSHO 1764 |
| 1 | GSHO 1767 | int-f.19 | Hordeum vulgare L. subsp. vulgare | Skåne län, Sweden | NSGC |  | | 1996 | DEVELOPED | | | 58.98333300, 13.50000000 | | | Genetic material | The spike appears to be six-rowed, but the lateral spikelets are much smaller, less than half the size of the central spikelets. Lateral spikelets are pointed and often have short awns. Seed set occurs in the lateral spikelets in the upper third of the spike. The base of the spike has shortened rachis internodes and appears erectoides-like. Inheritance: Monofactorial recessive. Location is unknown. Previous nomenclature and gene symbolization: None. Mutational events: int-f.19 in Foma. Mutant used for description and seed stocks: int-f.19 in Foma (GSHO 1767); int-f.19 in Bowman (PI 483237)*3 (GSHO 2270). | 1006080 | GSHO 1767 |
| 2 | GSHO 1768 | int-h.42 | Hordeum vulgare L. subsp. vulgare | Skåne län, Sweden | NSGC |  | | 1996 | DEVELOPED | | | 58.98333300, 13.50000000 | | | Genetic material | Lateral spikelets are enlarged and have an inconspicuously pointed apex, but they do not set seed. Induced mutants show early heading and have an elongated basal internode. The spike appears lax with shortened rachis internodes at the base. The Bowman backcross-derived line is slightly shorter (5/6 normal) and produces extra spikelets (up to five fertile ones) at several rachis nodes in the lower half of the spike. Fusion of some spikelets results in double and occasionally triple kernels. Inheritance: Monofactorial recessive. Location is unknown. Previous nomenclature and gene symbolization: None. Mutational events: int-h.42, -h.43, -h.44 in Kristina; int-h.83 in Bonus (PI 189763). Mutant used for description and seed stocks: int-h.42 in Kristina (GSHO 1768); int-h.42 in Bowman (PI 483237)*5 (GSHO 2271). | 1006081 | GSHO 1768 |
| 3 | GSHO 1769 | int-i.39 | Hordeum vulgare L. subsp. vulgare | Skåne län, Sweden | NSGC |  | | 1996 | DEVELOPED | | | 58.98333300, 13.50000000 | | | Genetic material | Lateral spikelets are enlarged and slightly pointed at the apex, but they fail to set seed. The tip of the spike may have very short rachis internodes and appears very dense or fasciated. The Bowman backcross-derived line exhitbits reduced plant height (5/6 normal), reduced spike length, and a distinct elongation of the basal rachis internode. Inheritance: Monofactorial recessive. Location is unknown. Previous nomenclature and gene symbolization: None. Mutational events: int-i.39 in Kristina. Mutant used for description and seed stocks: int-i.39 in Kristina (GSHO 1769); int-i.39 in Bowman (PI 483237)*4 (GSHO 2272). | 1006102 | GSHO 1769 |
| 4 | 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 |
| 5 | GSHO 775 | vrs4.k | Hordeum vulgare L. subsp. vulgare | Japan | | | Historic | 1994 | DEVELOPED | | | | | | Genetic material | Alleles at this locus enhance the development of lateral spikelets and formation of additonal spikelets to various degrees. The int-e mutants, which were isolated in two-rowed cultivars, have enlarged lateral spikelets that may set seed in the upper two-thirds of the spike. Kernels in lateral spikelets are smaller than those from central spikelets in int-e mutants. The rachilla may be deformed by partial formation of an extra spikelet. The awn size on lateral spikelets range from a pointed apex to 3/4 normal length. The mul1.a and vrs4.k alleles, which were isolated in six-rowed cultivars, may produce numerous extra spikelets at the base of the lateral spikelets and on the rachilla. Phenotypic differences among alleles are retained in the Bowman backcross-derived lines. Inheritance: Monofactorial recessive. Located in chromosome 3HL, about 27.5 cM distal from the uzu (uzu) locus. Previous nomenclature and gene symbolization: Multiflorus=mul. Intermedium spike-e=int-e. Six-rowed spike 4=v4. Mutational events: mul1.a (Alb Acc 321, GSHO 561) in Montcalm (CIho 7149); vrs4.k (Gamma III 3B, MFB-2) in MFB 104 (PI 232921), vrs4.l (Xc 41.5, Piro-2) in Piroline (PI 262210); vrs4.m (X17 2497, Piro-7) in Piroline; int-e.4 (trans) in Bonus (PI 189763), -e.65 in Bonus; int-e.72, -e.87 in Bonus, -e.89, -e.90, -e.91, -e.92, -e.101 in Hege. Mutant used for description and seed stocks: vrs4.k in Gamma III 3B (GSHO 775); int-e.58 in Kristina (GSHO 1766); mul1.a in Bowman (PI 483237)*6 (GSHO 1985); vrs4.k in Bowman*6 (GSHO 1986); int-e.58 in Bowman*6 (GSHO 1987). | 1513925 | GSHO 775 |
| 6 | GSHO 776 | vrs5.n | Hordeum vulgare L. subsp. vulgare | Colorado, United States | |  | Historic | 1994 | DONATED | 05/1994 | | | | | Genetic material | Alleles at the int-c (vrs5) locus alter the size of lateral spikelets. The lemma apex of lateral kernels is rounded or weakly pointed, awnless or short-awned. Lower lateral spikelets may develop poorly in some int-c mutants, while seed development may occur in all lateral spikelets of others. Variability in lateral spikelet development among the int-c mutants is responsive, also, to environmental conditions. The Int-c.a (formally l) allele in six-rowed barley increases the size of lateral spikelets, while the int-c.b (formally i) allele in two-rowed barley prevents anther development in lateral spikelets. The int-c.5 mutant n Bonus produces fertile stamens in lateral spikelets. in the presence of the Int-c.h (formally lh) allele of Mortoni, lateral spikelets are male fertile and may occasionally set seed. Spikes of vrs5.n plants appear similar to the six-rowed spike, but lateral spikelets are smaller (less than half the size of the central spikelets) and broader. Inheritance: Monofactorial recessive. Located in chromosome 4HS, about 13.1 cM proximal from the fch9 (chlorina seedling 9) locus, and about 14.5 cM distal from the Kap (hooded lemma) locus. Previous nomenclature and gene symbolization: Intensifier for Z=W. Infertile intermedium=i. Allelic series lh, l, i. Intermedium spike-c=int-c. Six-rowed spike 5=v5. Mutational events: int-c.b in two-rowed barley; Int-c.h (lh) in Mortoni (Ciho 2210, B6-12); vrs5.n (v5) in Gamma4(38X-197, OUM338); int-c.5 in Bonus (PI 189763); int-c.7, -c.62, 0c.63 in Bonus, -c.13, -c.15, -c.16, -c.18, -c.25, -c.29 in Foma (CIho 11333), -c.33, -c.38, -c.45, -c.48, -c.49, -c.53, -c.56, -c.60 in Kristina; int-c.70, -c.76, -c.78, -c.84 in Bonus, -c.95 in Hege. Mutant used for description and seed stocks: vrs5.n in Gamma 4 (GSHO 776); int-c.b in Hordeum distichon var niginudum (GSHO 988); int-c.5 in Bonus (GSHO 1765); ..(GSHO 2003). Ref.: Forster, B.P. 1993. Coordinator's report: Chromosome 4. BGN 22:75-77. | 1513728 | GSHO 776 |