Genomic mapping of defense response genes in wheat

Li, W. L.; Faris, Justin D.; Chittoor, J. M.; Leach, Jan E.; Hulbert, Scot H.; Liu, D. J.; Chen, P. D.; Gill, Bikram S.

doi:10.1007/s001220051062

Cited by 132 publications

(107 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hybridization of hexaploid wheat with a maize LOX probe has revealed a total of 11 bands located on chromosomes 4 and 5 (Li et al, 1999). This result is consistent with our findings of two Lpx-1 genes in the B genome (with single or duplicated copies in the A and D genomes) and single copies of the Lpx-2 and Lpx-3 loci in each of the genomes (total 10 to 12 LOX genes).…”

Section: Article In Presssupporting

confidence: 91%

“…The map location of the wheat LOX genes obtained in this study agrees with previous mapping studies in wheat and barley (Hart and Langston, 1977;Li et al, 1999; Table 2 Distribution of the Lpx-B1.1 deletion among 15 durum wheat varieties and its association with LOX activity in semolina extracts at pH 4.8 and 6.6. Activity is expressed as nanomoles of hydroperoxides per gram of semolina per min using absorbance at 234 nm and a 1-cm light path cell Nachit et al, 2001;van Mechelen et al, 1999).…”

Section: Evolution Of Lox Genes In the Triticeaesupporting

confidence: 89%

“…More recent mapping studies in tetraploid (Nachit et al, 2001) and hexaploid wheat (Li et al, 1999) confirmed the isoenzyme studies and showed that LOX genes are located in colinear regions in wheat and barley suggesting that they are orthologous. These mapping results indicate that the wheat Lpx-2 locus corresponds to the barley LoxC gene (homoeologous group 5) whereas the wheat Lpx-1 locus corresponds to barley LoxA or LoxB locus (homoeologous group 4).…”

Section: Introductionmentioning

confidence: 68%

See 2 more Smart Citations

A deletion at the Lpx-B1 locus is associated with low lipoxygenase activity and improved pasta color in durum wheat (Triticum turgidum ssp. durum)

Carrera

Echenique

Zhang

et al. 2007

Journal of Cereal Science

115

View full text Add to dashboard Cite

The concentration of yellow carotenoid pigments in durum wheat grain is an important quality criterion and is determined both by their accumulation and by their degradation by lipoxygenase enzymes (Lpx loci). The existence of a duplication at the Lpx-B1 locus and the allelic variation for a deletion of the Lpx-B1.1 copy is reported. This deletion was associated with a 4.5-fold reduction in lipoxygenase activity and improved pasta color (Po0.0001) but not semolina color, suggesting reduced pigment degradation during pasta processing. A molecular marker for the deletion was mapped on chromosome 4B in a population obtained from the cross between durum line UC1113 and variety Kofa. A second lipoxygenase locus, designated Lpx-A3, was mapped on the homoeologous region on chromosome 4A and was associated with semolina and pasta color (Po0.01) but not with lipoxygenase activity in the mature grain. Selection for both the UC1113 allele for Lpx-A3 and the Kofa Lpx-B1.1 deletion resulted in a 10% increase in yellow scores for dry pasta relative to the opposite allele combination. This result indicates that the markers and the new allelic variants reported here will be useful tools to manipulate the wheat Lpx loci and to improve pasta color. r

show abstract

Section: Article In Presssupporting

confidence: 91%

Section: Evolution Of Lox Genes In the Triticeaesupporting

confidence: 89%

Section: Introductionmentioning

confidence: 68%

See 1 more Smart Citation

A deletion at the Lpx-B1 locus is associated with low lipoxygenase activity and improved pasta color in durum wheat (Triticum turgidum ssp. durum)

Carrera

Echenique

Zhang

et al. 2007

Journal of Cereal Science

115

View full text Add to dashboard Cite

show abstract

“…Past studies have shown that Lpx-1 and Lpx-3 loci are located on the short and long arms of group 4 chromosomes, respectively, whereas Lpx-2 loci are on the long arms of group 5 chromosomes (Carrera et al, 2007;Garbus et al, 2009;Hart and Langston, 1977;Li et al, 1999;Zhang et al, 2008). Although significant insights have been gained of the wheat LOX genes from Lpx-B1 and Lpx-B3 (Carrera et al, 2007;Garbus et al, 2009;Zhang et al, 2008), relatively little is known about the LOX members in the A or D genome Lpx loci.…”

Section: Talox1 and 2 Genes And Their Chromosomal Locimentioning

confidence: 99%

“…In contrast to the progress above, there is relatively little knowledge on the LOX enzymes and their coding genes in the crop plants with complex polyploid genomes, such as hexaploid common wheat. Past studies have revealed the existence of at least two LOX loci (Lpx-1 and 2, located on groups 4 and 5 chromosomes, respectively) in common wheat (Hart and Langston, 1977;Li et al, 1999). However, three such loci (Lpx-1, 2 and 3, with Lpx-3 found on both 4A and 4B chromosomes) have been identified in durum wheat (Triticum turgidum Desf.…”

Section: Introductionmentioning

confidence: 99%

Molecular analysis of lipoxygenase (LOX) genes in common wheat and phylogenetic investigation of LOX proteins from model and crop plants

Feng

Dong

et al. 2010

Journal of Cereal Science

View full text Add to dashboard Cite

Genetic architecture of polyphenol oxidase activity in wheat flour by genome‐wide association study

Zhai

Wen

et al. 2020

Crop Science

View full text Add to dashboard Cite

The primary cause of time-dependent discoloration in wheat (Triticum aestivum L.)based products is polyphenol oxidase (PPO) activity. A comprehensive genetic characterization of PPO activity in wheat could expedite the development of wheat varieties with low PPO activity. To dissect the genetic architecture of PPO activity in wheat flour, a panel of 166 diverse bread wheat cultivars was phenotyped in four different environments and genotyped by high-density wheat 90K and 660K arrays. A genome-wide association study (GWAS) was performed by a mixed linear model that incorporated population structure and relative kinship. Four hundred and sixty-five stable marker-trait associations representative of 43 quantitative trait loci (QTL) for PPO activity identified in at least two environments were located on all wheat chromosomes except 5A, with each explaining 6.6-32.4% of the phenotypic variance. Based on IWGSC RefSeq v1.0, we found that QPPO2A.3, QPPO2B.1, QPPO2B.2, and QPPO2D.2 were consistent with the previously reported QTL, and 12 QTL located on homoeologous group 1 chromosomes (6 QTL), chromosomes 4B, 4D, and 7A (2 QTL), and chromosome 7B (2 QTL) are likely to be new PPO loci. Based on physical positions of QTL and previous studies, Ppo-A1, Ppo-A2, Ppo-B2, Ppo-D2, Pinb-D1, and genes encoding a Cu ion-binding protein and a Cu-transporting ATPase RAN1like protein were considered as candidates for QPPO2A.3, QPPO2B.1, QPPO2D.2,

show abstract

Genomic mapping of defense response genes in wheat

Cited by 132 publications

References 34 publications

A deletion at the Lpx-B1 locus is associated with low lipoxygenase activity and improved pasta color in durum wheat (Triticum turgidum ssp. durum)

A deletion at the Lpx-B1 locus is associated with low lipoxygenase activity and improved pasta color in durum wheat (Triticum turgidum ssp. durum)

Molecular analysis of lipoxygenase (LOX) genes in common wheat and phylogenetic investigation of LOX proteins from model and crop plants

Genetic architecture of polyphenol oxidase activity in wheat flour by genome‐wide association study

Contact Info

Product

Resources

About