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ACCESSIONPLANT NAMETAXONOMYORIGINGENEBANKIMAGEAVAILABILITYRECEIVEDSOURCE TYPESOURCE DATECOLLECTION SITECOORDINATESELEVATIONHABITATIMPROVEMENT LEVELNARRATIVE
0GSHO 2504eam10.mHordeum vulgare L. subsp. vulgare North Dakota, United StatesNSGCKERNELS1996DONATED04/1996Genetic materialIn winter nurseries at Cuidad Obregon, Sonora, Mexico and Davis, California, USA, plants of Super Precoz 2H head about 11 days earlier than lines with the genes eam7.g or eam8.k for photoperiod insensitivity from Atsel and Sv Mari, respectively. The eam10.m gene appears to suppress expression of the eam7.g and eam8.k genes. Plants expressing eam10.m become chlorotic (yellow green) under photothermal stress. Zeaxanthin increases at the expense of chlorophyll and other pigments. The chlorotic appearance is similar to that observed in plants homozygous for other recessive genes for early maturity (eam7, eam8, and eam9). Inheritance: Monofactorial recessive. Located in chromosome 3HL, about 2.0 + 5.8 cM from the Est1-Est4 (esterase 1, esterase 4) locus. Previous nomenclature and gene symbolization: Early maturity sp=easp. Mutational events: eam10.m in Super Precoz 2H plus a dominant maturity enhancer; eam10.m in Amber Nude without the enhancer. Mutant used for description and seed stocks: eam10.m in Super Precoz 2H (GSHO 2504); eam10.m in Amber Nude (GSHO 2505).1545060GSHO 2504
1GSHO 579eam7.gHordeum vulgare L. subsp. vulgare California, United StatesNSGCKERNELS1994DEVELOPEDGenetic materialUnder short-day conditions in California, USA, mutant plants bloom about 4 weeks before California Mariout, produce relatively few tillers, are fine stemmed, and are relatively short. Differences are less pronounced under long-day conditions. Mutants are partially insensitive to photoperiod and have a vernalization requirement. Under long-day conditions, difficulty in identification of segregates expressing the eam7.g gene was reported. When the Eam1.a (early maturity 1) gene is not present, eam7.g plants head to 10 to 14 days earlier than Bowman in nurseries at Yuma, Arizona, USA, but only 3 to 5 days earlier at Fargo, North Dakato, USA. The Eam1.a gene present in California Mariout apparently interacts with the eam7.g allele under short-day conditions to cause extreme earliness. Inheritance: Monofactorial recessive. Located in chromosome 6HS, about 0.5 cM from the rob (orange lemma) locus, and about 3.0 cM from the centromere. Previous nomenclature and gene symbolization: Early heading=ec. Early maturity 7=ea7. Mutational events: eam7.g in BC6 California Mariout (GBC326); eam7.n (Ea1), eam7.o (Ea2), eam7.p (Ea3) in Chikurin Ibaraki 1 (OUJ069, CIho 7370). Mutant used for description and seed stocks: eam7.g in BC6 California Mariout (GSHO 579); eam7.g in Bowman (PI 483237(*4 (GSHO 2068).1512327GSHO 579