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.

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.

Detection of quantitative trait loci for agronomic, yield, grain and disease characters in spring barley (Hordeum vulgare L.)

1995 ◽  
Vol 91-91 (6-7) ◽  
pp. 1037-1047 ◽  
Author(s):  
W. T. B. Thomas ◽  
W. Powell ◽  
R. Waugh ◽  
K. J. Chalmers ◽  
U. M. Barua ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Quantitative Trait ◽  
Spring Barley ◽  
Hordeum Vulgare L ◽  
Trait Loci ◽  
Agronomic Yield

Detection of quantitative trait loci for heading date based on the doubled haploid progeny of two elite Chinese wheat cultivars

Genetica ◽  
2008 ◽  
Vol 135 (3) ◽  
pp. 257-265 ◽  
Author(s):  
Kunpu Zhang ◽  
Jichun Tian ◽  
Liang Zhao ◽  
Bin Liu ◽  
Guangfeng Chen
Keyword(s):  
Quantitative Trait Loci ◽  
Doubled Haploid ◽  
Quantitative Trait ◽  
Heading Date ◽  
Wheat Cultivars ◽  
Trait Loci ◽  
Chinese Wheat

scholarly journals Thermal plasticity of the circadian clock is under nuclear and cytoplasmic control in wild barley

2018 ◽  
Author(s):  
Eyal Bdolach ◽  
Manas Ranjan Prusty ◽  
Adi Faigenboim-Doron ◽  
Tanya Filichkin ◽  
Laura Helgerson ◽  
...  
Keyword(s):  
High Temperature ◽  
Quantitative Trait Loci ◽  
Hordeum Vulgare ◽  
Circadian Clock ◽  
Doubled Haploid ◽  
Quantitative Trait ◽  
Wild Barley ◽  
Doubled Haploid Population ◽  
Thermal Plasticity ◽  
Trait Loci

AbstractTemperature compensation, expressed as the ability to maintain clock characteristics (mainly period) in face of temperature changes, is considered a key feature of circadian clock systems. In this study, we explore the genetic basis for circadian clock plasticity under high temperatures by utilizing a new doubled haploid (DH) population derived from two reciprocal Hordeum vulgare sps. spontaneum hybrids genotypes (crosses between B1K-50-04 and B1K-09-07). Genotyping by sequencing of DH lines indicated a rich recombination landscape, with minor fixation (less than 8%), for one of the parental alleles, yet with prevalent and varied segregation distortion across seven barley chromosomes. Phenotyping was conducted with a high-throughput platform under optimal and high temperature environments. Genetic analysis, which included QxE and binary-threshold models, identified a significant influence of the maternal organelle genome (the plasmotype), as well as several nuclear quantitative trait loci (QTL), on clock phenotypes (free-running period and amplitude). Moreover, it showed the differential contribution of cytoplasmic genome clock rhythm buffering against high temperature. Resequencing of the parental chloroplast indicated the presence of several candidate genes underlying these significant effects. This first reported plasmotype-driven clock plasticity paves the way for identifying an hitherto unknown impact of nuclear and plasmotype variations on clock robustness and on plant adaptation to changing environments.HighlightCircadian clock robustness to high temperature is controlled by nuclear and plasmotype quantitative trait loci in a wild barley (Hordeum vulgare ssp. spontaneum) reciprocal doubled haploid population.

Quantitative Trait Loci for Yield Traits Located Between Hd3a and Hd1 on Short Arm of Chromosome 6 in Rice

Rice Science ◽  
2011 ◽  
Vol 18 (4) ◽  
pp. 257-264 ◽  
Author(s):  
Ye-yang FAN ◽  
Chen CHEN ◽  
Ji-rong WU ◽  
Shi-hua CHENG ◽  
Jie-yun ZHUANG
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Chromosome 6 ◽  
Yield Traits ◽  
Trait Loci
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