Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Functional Genomic Analysis Of Barley(Hordeum vulgare L.) Grain Protein Accumulation

ABSTRACT: Effect of high grain protein locus on barley grain protein accumulation. Gene expression levels were analysed in Karl, a low grain protein variety with its near-isogenic line 10_11(has high grain protein locus, chromosome 6)using Barley1 22k affymetrix chip. ****[PLEXdb(http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Aravind Jukanti. The equivalent experiment is BB53 at PLEXdb.] developmental stage: 14 days past anthesis - genotype: Karl - tissue type: Leaves(3-replications); developmental stage: 14 days past anthesis - genotype: Karl - tissue type: Kernels(3-replications); developmental stage: 14 days past anthesis - genotype: 10-11 (NIL with high grain protein locus) - tissue type: Leaves(3-replications); developmental stage: 14 days past anthesis - genotype: 10-11 (NIL with high grain protein locus) - tissue type: Kernels(3-replications); developmental stage: 21 days past anthesis - genotype: Karl - tissue type: Leaves(3-replications); developmental stage: 21 days past anthesis - genotype: Karl - tissue type: Kernels(3-replications); developmental stage: 21 days past anthesis - genotype: 10-11 (NIL with high grain protein locus) - tissue type: Leaves(3-replications); developmental stage: 21 days past anthesis - genotype: 10-11 (NIL with high grain protein locus) - tissue type: Kernels(3-replications)

ORGANISM(S): Hordeum vulgare

SUBMITTER: Aravind Jukanti

PROVIDER: E-GEOD-33413 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Comparative transcriptome profiling of near-isogenic barley (Hordeum vulgare) lines differing in the allelic state of a major grain protein content locus identifies genes with possible roles in leaf senescence and nitrogen reallocation.

Jukanti Aravind K AK Heidlebaugh Nancy M NM Parrott David L DL Fischer Isabelle A IA McInnerney Kate K Fischer Andreas M AM

The New phytologist 20071119 2

To identify genes involved in the regulation and execution of leaf senescence and whole-plant nitrogen reallocation, near-isogenic barley germplasm divergent in senescence timing and protein concentration of mature grains was contrasted. Barley lines differing in allelic state at a major locus on chromosome six, controlling grain protein concentration, were obtained after four generations of backcrossing. Based on physiological data indicating major differences between low- and high-grain protei ...[more]

PMID: 18028296

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Project description:Grain length is a prominent determinant for the grain weight and appearance quality of rice. To elucidate the genetic basis of the control of grain length, we conducted quantitative trait locus (QTL) mapping to determine a genomic interval responsible for the a long-grain phenotype observed in a japonica cultivar HD385 by using an F2:3 population and recombinant inbred line (RIL) population, which is are derived from a cross between the long-grain japonica cultivar HD385 and short-grain japonica cultivar Nipponbare (NIP). This led to the identification of a novel QTL, which is located on chromosome 3, for grain length, named qIGL1 (for Increased Grain Length 1); the HD385-derived allele showed enhancement effects on grain length, and such an allele as well as NIP-derived allele are were thus designated qigl1 HD385 and qIGL1NIP, respectively. Genetic analysis revealed that qigl1HD385 displayed semi-dominant effects on grain length. To further narrow down the qIGL1 region, we developed a few advanced backcross populations to determine the precise location of qIGL1. Eventually, qIGL1 was delimited to a 70.8-kb region containing 9 open reading frames (ORFs). A comprehensive analysis indicated that ORF6 and ORF9, separately corresponding to LOC_Os03g30530 and LOC_Os03g30550, are were found to carry base substitutions and/or deletions, which resulted in changes or losses of amino acid residues. However, these alterations in coding sequences does did not significantly change the expression levels of both ORFs. To further elucidate the mechanisms behind the increases of grain length conferred by qigl1HD385, we generated a pair of near-isogenic lines (NILs), termed NIL-qigl1HD385 and NIL-qIGL1NIP, and discovered that introduction of qigl1HD385 into the NIP background significantly lead resulted into the elevations of grain length and 1000-grain weight. Closer inspection of outer epidermal cells of grain surfaces of both lines revealed that the cell length and width in the longitudinal direction are were significantly longer in NIL-qigl1HD385 compared with in NIL-qIGL1NIP, which may might stem partly from the downregulation of several cell cycle-related genes. Hence, our study studies identify identified a new semi-dominant natural allele contributing to the increase of grain length, and further shed light on the regulatory mechanisms of grain length.

Dataset Information

Functional Genomic Analysis Of Barley(Hordeum vulgare L.) Grain Protein Accumulation

Publications

Comparative transcriptome profiling of near-isogenic barley (Hordeum vulgare) lines differing in the allelic state of a major grain protein content locus identifies genes with possible roles in leaf senescence and nitrogen reallocation.

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