Data on whole genome resequencing of selected Malaysian rice accessions with opposing response to salinity stress.

The genomics and genetic information of Malaysian rice ( L.) is currently limited. It was necessary to conduct genome resequencing of these rice accessions exhibiting different responses to salinity stress.

Whole genome resequencing data and grain quality traits of the rice cultivar Mahsuri and its blast disease resistant mutant line, Mahsuri Mutant.

In Malaysia, rice mutant varieties that are genetically altered to confer resistance against blast disease have been substantially developed through mutational breeding program. However, due to the limited accessible information on the mutant lines, mutant gene variants corresponding to the disease resistance and other useful agronomic traits are yet to be exploited. Here, we conducted whole genome re-sequencing of blast resistance with kernel elongation traits in mutant line, Mahsuri Mutant (87,639,446 bp raw reads), and its parental line, Mahsuri (85,156,783 bp raw reads) using Illumina Novaseq 6000 sequencing platform with 30x sequencing coverage.

Data on genome resequencing of the rice cultivar MR219 and its abiotic stress tolerant mutant lines, NMR152 and NMR151.

The genomics and genetic information of Malaysian rice ( L.) and their mutant lines are very limited. Therefore, the genome resequencing of two drought and submergence tolerant mutant rice lines, NMR152 and NMR151 and their parental line, MR219 was performed using Illumina Hi Seq 4000 platform with 20x sequencing coverage to facilitate the identification of causal mutations and the discovery of candidate variants of single nucleotide polymorphisms (SNPs) from their genome.

Genotype × Environment Interaction and Stability Analysis of Commercial Hybrid Grain Corn Genotypes in Different Environments.

The introduction of superior grain corn genotypes with high and stable yield (YLD) in most environments is important to increase local production and reduce dependency on imported grain corn. In this study, days to tasseling (DT), plant height, and YLD of 11 grain corn genotypes were observed in 10 environments to evaluate the effects of genotype (G), environment (E), and genotype by environment interactions (GEI) using GGE analysis and the stability of genotypes using stability parameters. In each location, grain corn genotypes were arranged in three replications using a randomized complete block design.

Drought-Induced Changes in The Flowering Capacity, Anthesis Quality and Seed Set in Rice ( L.).

Drought stress significantly reduces grain yield (GY) due to poor spikelet fertility and anthesis quality. Aim of this study was to understand the changes of flowering capacity, anthesis quality traits and seed set in the re-watered drought stressed modern high yielding drought susceptible rice cultivar, IR64 at heading (DSH) and booting (DSB) stages. The well-watered plants served as control of the experiment.

Incorporating Drought and Submergence Tolerance QTL in Rice ( L.)-The Effects under Reproductive Stage Drought and Vegetative Stage Submergence Stresses.

Drought and submergence have been the major constraint in rice production. The present study was conducted to develop high-yielding rice lines with tolerance to drought and submergence by introgressing into a rice line with drought yield QTL (; = quantitative trait loci) viz. and using marker-assisted breeding.

Drought Yield QTL () with Consistent Effects on Morphological and Agronomical Traits of Two Populations of New Rice () Lines.

Drought has been a major limiting factor for rice production. Drought yield QTLs ( quantitative trait loci) were pyramided into MRQ74 and MR219 to produce drought tolerant lines. In this study, new drought tolerant MRQ74 and MR219 pyramided lines (PLs) were evaluated under drought stress (RS) and non-stress (NS) conditions to evaluate the effects of different combinations on morphological and agronomical traits.

Genetic Dissection of Grain Nutritional Traits and Leaf Blight Resistance in Rice.

Colored rice is rich in nutrition and also a good source of valuable genes/quantitative trait loci (QTL) for nutrition, grain quality, and pest and disease resistance traits for use in rice breeding. Genome-wide association analysis using high-density single nucleotide polymorphism (SNP) is useful in precisely detecting QTLs and genes. We carried out genome-wide association analysis in 152 colored rice accessions, using 22,112 SNPs to map QTLs for nutritional, agronomic, and bacterial leaf blight (BLB) resistance traits.

Marker-assisted selection strategy to pyramid two or more QTLs for quantitative trait-grain yield under drought.

Background: Marker-assisted breeding will move forward from introgressing single/multiple genes governing a single trait to multiple genes governing multiple traits to combat emerging biotic and abiotic stresses related to climate change and to enhance rice productivity. MAS will need to address concerns about the population size needed to introgress together more than two genes/QTLs. In the present study, grain yield and genotypic data from different generations (F to F) for five marker-assisted breeding programs were analyzed to understand the effectiveness of synergistic effect of phenotyping and genotyping in early generations on selection of better progenies.

Association Mapping of Yield and Yield-related Traits Under Reproductive Stage Drought Stress in Rice (Oryza sativa L.).

Background: The identification and introgression of major-effect QTLs for grain yield under drought are some of the best and well-proven approaches for improving the drought tolerance of rice varieties. In the present study, we characterized Malaysian rice germplasm for yield and yield-related traits and identified significant trait marker associations by structured association mapping.

Results: The drought screening was successful in screening germplasm with a yield reduction of up to 60% and heritability for grain yield under drought was up to 78%.

Pyramiding of drought yield QTLs into a high quality Malaysian rice cultivar MRQ74 improves yield under reproductive stage drought.

Background: With the objective of improving the grain yield (GY) of the Malaysian high quality rice cultivar MRQ74 under reproductive stage drought stress (RS), three drought yield QTLs, viz. qDTY 2.2, qDTY 3.

Marker assisted pyramiding of drought yield QTLs into a popular Malaysian rice cultivar, MR219.

Background: Three drought yield QTLs, qDTY 2.2, qDTY 3.1, and qDTY 12.