Identification of Rice Accessions Having Cold Tolerance at the Seedling Stage and Development of Novel Genotypic Assays for Predicting Cold Tolerance.

Rice is susceptible to cold stress at the seedling stage, which can delay growth and decrease yield. We evaluated 187 rice accessions for cold tolerance at the seedling stage and developed genotypic assays for three markers. All (20/20) and 20/140 accessions were highly cold tolerant.

RNA Sequencing Reveals Rice Genes Involved in Male Reproductive Development under Temperature Alteration.

Rice ( L.) is one of the most important food crops, providing food for nearly half of the world population. Rice grain yields are affected by temperature changes.

Rice ORMDL controls sphingolipid homeostasis affecting fertility resulting from abnormal pollen development.

The orosomucoids (ORM) are ER-resisdent polypeptides encoded by ORM and ORMDL (ORM-like) genes. In humans, ORMDL3 was reported as genetic risk factor associated to asthma. In yeast, ORM proteins act as negative regulators of sphingolipid synthesis.

Genetic structure of Thai rice and rice accessions obtained from the International Rice Research Institute.

Background: Although the genetic structure of rice germplasm has been characterized worldwide, few studies investigated germplasm from Thailand, the world's largest exporter of rice. Thailand and the International Rice Research Institute (IRRI) have diverse collections of rice germplasm, which could be used to develop breeding lines with desirable traits. This study aimed to investigate the level of genetic diversity and structures of Thai and selected IRRI germplasm.

Identification of a deletion in tms2 and development of gene-based markers for selection.

Rice is one of the most important food crops. The temperature-sensitive genic male sterility (TGMS) system provides a great potential for improving food production by hybrids. The use of TGMS system is simple, inexpensive, effective, and eliminates the limitations of the conventional three-line system.

The reticulate history of Medicago (Fabaceae).

The phylogenetic history of Medicago was examined for 60 accessions from 56 species using two nuclear genes (CNGC5 and beta-cop) and one mitochondrial region (rpS14-cob). The results of several analyses revealed that extensive robustly supported incongruence exists among the nuclear genes, the cause of which we seek to explain. After rejecting several processes, hybridization and lineage sorting of ancestral polymorphisms remained as the most likely factors promoting incongruence.

A novel dwarfing mutation in a green revolution gene from Brassica rapa.

Mutations in the biosynthesis or signaling pathways of gibberellin (GA) can cause dwarfing phenotypes in plants, and the use of such mutations in plant breeding was a major factor in the success of the Green Revolution. DELLA proteins are GA signaling repressors whose functions are conserved in different plant species. Recent studies show that GA promotes stem growth by causing degradation of DELLA proteins via the ubiquitin-proteasome pathway.