Biology Commons^™

Targeted Mapping Of Oryza Sativa Chilling Tolerance Candidate Genes Using Multiple Stress-Relevant Quantitative Traits, Naoki Simon Shimoyama

Dissertations (1934 -)

Developing chilling tolerant accessions of domesticated Asian rice is a potential source of significant crop improvement to address the needs of a growing global population. The uniquely chilling sensitive nature of the tropically originating Oryza sativa make it the most important staple crop that could gain the maximum benefit from improved tolerance to low temperature stress. However, mechanisms underlying this complex trait are not fully understood. Oryza sativa has two major varietal groups with different levels of chilling tolerance, JAPONICA and INDICA, providing an ideal tool to investigate mechanistic differences in the chilling stress tolerance responses within this important crop …

Genome-Wide Identification Of The A20/An1 Zinc Finger Proteon Family Genes In Ipomoea Batatas And Its Two Relatives And Function Analysis Of Ibsap16 In Salinity Tolerance, Hao Xie, Qiangqiang Yang, Xiaoxiao Wang, Michael Schläppi, Hui Yan, Meng Kou, Wei Tang, Xin Wang, Yungang Zhang, Qiang Li, Shaojun Dai, Yaju Liu

Biological Sciences Faculty Research and Publications

Stress-associated protein (SAP) genes—encoding A20/AN1 zinc-finger domain-containing proteins—play pivotal roles in regulating stress responses, growth, and development in plants. They are considered suitable candidates to improve abiotic stress tolerance in plants. However, the SAP gene family in sweet potato (Ipomoea batatas) and its relatives is yet to be investigated. In this study, 20 SAPs in sweet potato, and 23 and 26 SAPs in its wild diploid relatives Ipomoea triloba and Ipomoea trifida were identified. The chromosome locations, gene structures, protein physiological properties, conserved domains, and phylogenetic relationships of these SAPs were analyzed systematically. Binding motif analysis of IbSAPs indicated that …

Multiple Cold Tolerance Trait Phenotyping Reveals Shared Quantitative Trait Loci In Oryza Sativa, Naoki Shimoyama, Melineeh Johnson, André Beaumont, Michael Schläppi

Biological Sciences Faculty Research and Publications

Background

Developing chilling tolerant accessions of domesticated Asian rice is a potential source of significant crop improvement. The uniquely chilling sensitive nature of the tropically originating Oryza sativa make it the most important cereal crop that can gain significantly from improved tolerance to low temperatures. However, mechanisms underlying this complex trait are not fully understood. Oryza sativa has two subspecies with different levels of chilling tolerance, JAPONICA and INDICA, providing an ideal tool to investigate mechanistic differences in the chilling stress tolerance responses within this important crop species.

Results

The Rice Diversity Panel 1 (RDP1) was used to investigate …

Assessment Of Five Chilling Tolerance Traits And Gwas Mapping In Rice Using The Usda Mini-Core Collection, Michael Schläppi, Aaron K. Jackson, Georgia C. Eizenga, Aiju Wang, Chengcai Chu, Yao Shi, Naoki Shimoyama, Debbie L. Boykin

Biological Sciences Faculty Research and Publications

Rice (Oryza sativa L.) is often exposed to cool temperatures during spring planting in temperate climates. A better understanding of genetic pathways regulating chilling tolerance will enable breeders to develop varieties with improved tolerance during germination and young seedling stages. To dissect chilling tolerance, five assays were developed; one assay for the germination stage, one assay for the germination and seedling stage, and three for the seedling stage. Based on these assays, five chilling tolerance indices were calculated and assessed using 202 O. sativa accessions from the Rice Mini-Core (RMC) collection. Significant differences between RMC accessions made the five …