scholarly journals Identification of Quantitative Trait Loci (QTLs) Controlling Heading Time in the Population Generated from a Cross between Oriental and Occidental Barley Cultivars (Hordeum vulgare L.)

2004 ◽  
Vol 54 (4) ◽  
pp. 327-332 ◽  
Author(s):  
Mohammad Sameri ◽  
Takao Komatsuda
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Quantitative Trait ◽  
Heading Time ◽  
Barley Cultivars ◽  
Trait Loci

scholarly journals Genetic architecture of quantitative trait loci associated with morphological and agronomic trait differences in a wild by cultivated barley cross

Genome ◽  
2007 ◽  
Vol 50 (8) ◽  
pp. 714-723 ◽  
Author(s):  
L. Gyenis ◽  
S.J. Yun ◽  
K.P. Smith ◽  
B.J. Steffenson ◽  
E. Bossolini ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Phenotypic Variation ◽  
Quantitative Trait ◽  
Genetic Architecture ◽  
Flag Leaf ◽  
Barley Cultivars ◽  
Trait Loci ◽  
Glume Length ◽  
Cultivated Barley

Hordeum vulgare subsp. spontaneum is the progenitor of cultivated barley (Hordeum vulgare L.). Domestication combined with plant breeding has led to the morphological and agronomic characteristics of modern barley cultivars. The objective of this study was to map the genetic factors that morphologically and agronomically differentiate wild barley from modern barley cultivars. To address this objective, we identified quantitative trait loci (QTLs) associated with plant height, flag leaf width, spike length, spike width, glume length in relation to seed length, awn length, fragility of ear rachis, endosperm width and groove depth, heading date, flag leaf length, number of tillers per plant, and kernel color in a Harrington/OUH602 advanced backcross (BC2F8) population. This population was genotyped with 113 simple sequence repeat markers. Thirty QTLs were identified, of which 16 were newly identified in this study. One to 4 QTLs were identified for each of the traits except glume length, for which no QTL was detected. The portion of phenotypic variation accounted for by individual QTLs ranged from about 9% to 54%. For traits with more than one QTL, the phenotypic variation explained ranged from 25% to 71%. Taken together, our results reveal the genetic architecture of morphological and agronomic traits that differentiate wild from cultivated barley.

scholarly journals Quantitative trait loci for yield and grain plumpness relative to maturity in three populations of barley (Hordeum vulgare L.) grown in a low rain-fall environment

PLoS ONE ◽  
2017 ◽  
Vol 12 (5) ◽  
pp. e0178111 ◽  
Author(s):  
Bulti Tesso Obsa ◽  
Jason Eglinton ◽  
Stewart Coventry ◽  
Timothy March ◽  
Maxime Guillaume ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Quantitative Trait ◽  
Hordeum Vulgare L ◽  
Trait Loci ◽  
Rain Fall

Localization of quantitative trait loci (QTL) for agronomic important characters by the use of a RFLP map in barley (Hordeum vulgare L.)

1995 ◽  
Vol 90 (2) ◽  
pp. 294-302 ◽  
Author(s):  
G. Backes ◽  
A. Graner ◽  
B. Foroughi-Wehr ◽  
G. Fischbeck ◽  
G. Wenzel ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Quantitative Trait ◽  
Hordeum Vulgare L ◽  
Rflp Map ◽  
Trait Loci

RFLP mapping of five major genes and eight quantitative trait loci controlling flowering time in a winter × spring barley (Hordeum vulgare L.) cross

Genome ◽  
1995 ◽  
Vol 38 (3) ◽  
pp. 575-585 ◽  
Author(s):  
D. A. Laurie ◽  
N. Pratchett ◽  
J. W. Snape ◽  
J. H. Bezant
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Flowering Time ◽  
Quantitative Trait ◽  
Field Experiments ◽  
Chromosome 2 ◽  
Vernalization Response ◽  
Major Genes ◽  
Trait Loci ◽  
Glasshouse Experiment

A genetic map of 92 RFLP loci and two storage protein loci was made using 94 doubled-haploid lines from a cross between the winter barley variety Igri and the spring variety Triumph. The markers were combined with data from two field experiments (one spring sown and one autumn (fall) sown) and a glasshouse experiment to locate a total of 13 genes (five major genes and eight quantitative trait loci (QTL)) controlling flowering time. Two photoperiod response genes were found; Ppd-H1 on chromosome 2(2H)S regulated flowering time under long days, while Ppd-H2 on chromosome 5(1H)L was detected only under short days. In the field experiments Ppd-H1 strongly affected flowering time from spring and autumn sowings, while Ppd-H2 was detected only in the autumn sowing. The glasshouse experiment also located two vernalization response genes, probably Sh and Sh2, on chromosomes 4(4H)L and 7(5H)L, respectively. The vernalization response genes had little effect on flowering time in the field. Variation in flowering time was also affected by nine additional genes, whose effects were not specifically dependent on photoperiod or vernalization. One was the denso dwarfing gene on chromosome 3(3H)L. The remaining eight were QTLs of smaller effect. One was located on chromosome 2(2H), one on 3(3H), one on 4(4H), one on 7(5H), two on 6(6H), and two on 1(7H). Model fitting showed that the 13 putative genes, and their interactions, could account for all the observed genetical variation from both spring and autumn sowings, giving a complete model for the control of flowering time in this cross.Key words: barley, Hordeum vulgare, flowering time, photoperiod, vernalization, mapping.

Quantitative trait loci for heading date and straw characters in barley

Genome ◽  
1995 ◽  
Vol 38 (6) ◽  
pp. 1098-1104 ◽  
Author(s):  
B. Kjær ◽  
J. Jensen ◽  
H. Giese
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Doubled Haploid ◽  
Quantitative Trait ◽  
Rapd Markers ◽  
Spring Barley ◽  
Heading Date ◽  
Chromosome 6 ◽  
Chromosome 2 ◽  
Trait Loci

Quantitative trait loci (QTLs) for heading date and straw characters were examined in 79 chromosome-doubled haploid lines derived from the F1 generation of a cross between a six-rowed winter barley and a two-rowed spring barley. A genetic map covering 1100 cM containing 85 markers, including isozyme, morphological, RFLP, and RAPD markers, was constructed. All traits examined had two QTLs with large effects on chromosome 2. In addition, a QTL for length of the top internode was found on chromosome 6. The QTL in the chromosome segment around locus v (two row/six row) on chromosome 2 may be caused by pleiotropic effects of this locus. The same QTLs for heading date and straw length were found in both 1989 and 1991. The results indicate that two QTLs on chromosome 2 affect a group of correlated traits.Key words: Hordeum vulgare, earliness, RFLP, two rowed, six rowed, linkage map.

Quantitative trait loci on barley (Hordeum vulgare L.) chromosome 7 associated with components of winterhardiness

Genome ◽  
1993 ◽  
Vol 36 (1) ◽  
pp. 66-71 ◽  
Author(s):  
P. M. Hayes ◽  
T. Blake ◽  
T. H. H. Chen ◽  
S. Tragoonrung ◽  
F. Chen ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Cold Tolerance ◽  
Quantitative Trait ◽  
Growth Habit ◽  
Genome Mapping ◽  
Chromosome 7 ◽  
Hordeum Vulgare L ◽  
Trait Loci ◽  
Qtl Effects

Quantitative trait loci (QTL) controlling traits associated with winterhardiness in barley (field survival, LT50, growth habit, and crown fructan content) were mapped to chromosome 7 in a population of 100 F1-derived doubled haploid lines. The largest QTL effects for all traits were detected in a 21% recombination interval on the long arm of chromosome 7. QTL in this region accounted for 37–68% of the variation for three measures of cold tolerance, 47% of the variation for growth habit, and 28% of the variation in crown fructan content. Trait association may be due to linkage rather than pleiotropy.Key words: Hordeum vulgare, genome mapping, quantitative trait loci, winterhardiness, cold tolerance, fructan, growth habit.

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