Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 11/1/2004
Publication Date: 1/1/2005
Citation: Pinson, S.R., Li, Z., Tabien, R.E., Tai, T., Redus, M.A., Fjellstrom, R.G. 2005. The Lemont/Teqing RIL rice population provides unique opportunity for correlating molecular data with phenomics. Proceedings, 2nd International Symposium, Rice Functional Genomics, Tucson, Arizona. p. 150.
Technical Abstract: Genetic maps and populations are the basic tool with which nucleotide sequence and phenotypic traits are linked; they are important tools for functional genomics research. A permanent rice gene-mapping population now consisting of 280 F16 recombinant inbred lines (RILs) derived from a cross between 'Lemont' and 'TeQing' is being used for efficient mapping of molecular markers, major genes, and QTLs by at least 15 private and public research groups both within and outside the USA. Because of genetic similarities between rice and other cereal species, this LQ-RIL population supports investigation focussed on several crops in addition to rice. With literature now containing reports of more than 200 Lemont and TeQing QTLs affecting grain and plant traits, this population offers unique opportunity to efficiently evaluate relationships between genes, QTLs, phenotype, morphology, physiology, biochemistry, and environmental differences. Most of these QTLs were mapped relative to 203 RFLP markers. The map has been enhanced with the addition of 140 microsatellite loci. Among the presently available rice gene-mapping populations, the LQ-RIL population is unique in that a) it was the first to be well adapted to USA and other semi-tropical growing conditions, b) it exhibits marker segregation ratios that are less genetically skewed (closer to Mendelian expectations) than other mapping populations, and c) it consists of a larger set of progeny lines than other populations, allowing for identification of genes with smaller effect and for more precise estimation of marker/gene locations. Lemont is a high-yielding tropical japonica variety from the USA; TeQing is a very high yielding indica from China. As a subspecific cross, this progeny population exhibits relatively high marker polymorphism (approximately 80% of RFLP and SSR markers tested), yet also exhibits sufficient reproductive fertility to support large-plot investigation. The LQ-RIL population, supervised by Dr. Pinson, was developed collaboratively by the USDA and Texas A&M University.