BGS 57, Elongated outer glume 1, eog1

Extended outer glumes = e (10).
Wide glumes = w (10).
Macrolepis = lep-e (lep-a) (7, 14, 15).
Long outer glume = log (16).
Elongated outer glume = e (3, 16).

Monofactorial recessive (1, 2, 17).
Located in chromosome 2HL (6); eog1.a is about 30.5 cM proximal from the vrs1 (six-rowed spike 1) locus (3, 11); eog1.a is associated with SNP markers 2_0387 to 2_0528 (positions 90.54 to 118.78 cM) in 2H bins 07 to 08 of the Bowman backcross-derived line BW299 (4); eog1.c is associated with SNP markers 1_0996 to 2_0699 (positions 89.0 to 126.33 cM) in 2H bins 07 to 09 of the Bowman backcross-derived line BW300 (4); eog1.d is associated with SNP markers 1_0498 to 1_1402 (positions 81.43 to 119.86 cM) in 2H bins 07 to 08 of the Bowman backcross-derived line BW301 (4); eog1.e is associated with SNP markers 1_1493 to 2_0476 (positions 76.05 to 96.47 cM) in 2H bins 06 to 07 of the Bowman backcross-derived line BW302 (4), likely in 2H bin 07.

A multiple allelic series exists at this locus, which controls increased size of the outer glumes (glumes) of the spikelet. Glume width varies from 2.5 to 4.0 mm depending on genetic background and specific allele (17, 18). Glume awn length varies from awnless to nearly as long as the lemma awn (92 mm) depending on the eog1 allele present and genes at other loci (10, 17), but some confusion has occurred regarding alleles at the eog1 locus and expression of other glume characteristics (16, 17). The size of the glume can range from less than twice normal width in CIho 14955 to lemma-like glumes in Triple Bearded Mariout (5). Kernels of the Bowman backcross-derived lines for eog1.a (BW299) and eog1.c (BW300) were slightly larger than those of Bowman in non-heat stressed environments. Other morphological and agronomic traits of BW299 and BW300 were similar to those of Bowman (5).

A spontaneous mutant and natural occurrence in a few cultivars (1, 17).

eog1.a in Triple Bearded Mariout (CIho 2523, GSHO 29) (6, 17); for additional mutants and variants at the eog1 locus see Groups I and II mutants of Tsuchiya (17); lep-e.1 (NGB 114210, GSHO 960), -e.2 (NGB 114211) in Gull (NGB 1480, CIho 1145), -e.3 (NGB 114212), -e.4 (NGB 114213), -e.5 (NGB 114214), -e.6 (NGB 114215), -e.7 (NGB 114216), -e.8 (NGB 114217), -e.9 (NGB 114218), -e.10 (NGB 114219), -e.11 (NGB 114220), -e.12 (NGB 114221), -e.13 (NGB 114222), -e.29 (NGB 114239), -e.34 (NGB 114244), -e.42 (NGB 114253, NGB 114386), -e.45 (NGB 114258), -e.49 (NGB 114265), -e.50 (NGB 114266), -e.51 (NGB 114267), -e.52 (NGB 114268), -e.53 (NGB 114269), -e.54 (NGB 114270) in Bonus (NGB 14657, PI 189763), -e.14 (NGB 114223), -e.15 (NGB 114224), -e.16 (NGB 114225), -e.17 (NGB 114226), -e.18 (NGB 114227), -e.19 (NGB 114228, NGB 114229), -e.20 (NGB 114230), -e.21 (NGB 114231), -e.22 (NGB 114232), -e.23 (NGB 114233), -e.24 (NGB 114234), -e.25 (NGB 114235), -e.26 (NGB 114236), -e.27 (NGB 114237), -e.28 (NGB 114238), -e.30 (NGB 114240), -e.31 (NGB 114241), -e.32 (NGB 114242), -e.33 (NGB 114243), -e.38 (NGB 114248) in Foma (NGB 14659, CIho 11333), -e.35 (NGB 114245), -e.36 (NGB 114246), -e.37 (NGB 114247), -e.39 (NGB 114249, NGB 114250), -e.40 (NGB 114251), -e.41 (NGB 114252), -e.43 (NGB 114254, NGB 114255), -e.44 (NGB 114256), -e.46 (NGB 114257), -e.47 (NGB 114261, NGB 114262), -e.48 (NGB 114263, NGB 114264) in Kristina (NGB 1500, NGB 14661) (7, 13, 14, 15); eog1.b in PI 173567 (G 8) (17); eog1.c in CIho 14955 (enlarged outer glumes) (5); eog1.d (FN05, GSHO 3656), eog1.f (FN284, GSHO 3657), eog1.g (FN296, GSHO 3658), eog1.h (FN297, GSHO 3659), eog1.i (FN298, GSHO 3660) (enlarged outer glumes), eog1.j (FN325, GSHO 3661) (enlarged outer glumes), eog1.k (FN341, GSHO 3662), eog1.l (FN421, GSHO 3663), eog1.m (FN428, GSHO 3664), eog1.n (FN463, GSHO 3665), eog1.o (FN464, GSHO 3666), eog1.p (FN465, GSHO 3667), eog1.q (FN466, GSHO 3668), eog1.r (FN491, GSHO 3669), eog1.s (FN503, GSHO 3670) in Steptoe (CIho 15229) (12); eog1.e in AB1380 (Nuri Pori, T1-33, GSHO 285, CIho 5152) (12); eog1.t (Mut 3447/64) in Proctor (PI 280420) (9).

eog1.a in Triple Bearded Mariout (CIho 2523, GSHO 29); lep-e.1 (NGB 114210, GSHO 960) in Gull (NGB 1480, CIho 1145); eog1.a in Bowman (PI 483237)*7 (GSHO 1891, BW299, NGB 20583); eog1.c from CIho 14955 in Bowman*7 (GSHO 1892, BW300, NGB 20584); eog1.d (FN05, GSHO 3656) from Steptoe in Bowman*3 (BW301, NGB 22101); eog1.e from Nuri Pori (GSHO 285, PI 87189) in Bowman*3 (BW302, NGB 22102).

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