Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: DEVELOPMENT AND CHARACTERIZATION OF GENETIC RESOURCES FOR AGRONOMIC AND QUALITY TRAITS USING GENOMIC TOOLS

Location: Dale Bumpers National Rice Research Center

Title: Rice straighthead disease- prevention, germplasm, gene mapping and DNA markers for breeding

Authors
item Yan, Wengui
item Moldenhauer, Karen -
item Zhou, Wei -
item Xiong, Haizheng -
item Huang, Bihu -

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: July 22, 2013
Publication Date: N/A

Interpretive Summary: Straighthead is a physiological disorder of rice that results in sterile florets with distorted lemma and palea, and may cause complete losses of grain yield when severe. A water management practice that is called ‘Draining and Drying’ was developed by farmers in the early 1900s, and is currently used as the only recommended method to prevent straighthead. The timing for draining the field is determined through the use of software programs that can predict growth and development stages of the rice plant based on historical and current weather conditions. However, this prevention practice costs more than $ 7 million annually in Arkansas in terms of fuel, water and labor use. Thus, an effective and cost saving control of straighthead is through the development and use of resistant cultivars. This chapter summarizes research efforts to address straighthead in rice, including its global impact, causal factors, identification of resistant rice cultivars, and development of genetic markers linked with resistance that can be used in breeding.

Technical Abstract: Straighthead is a physiological disorder of rice that results in sterile florets with distorted lemma and palea, and may cause complete losses of grain yield when severe. A water management practice that is called ‘Draining and Drying’ was developed by farmers in the early 1900s, and is currently used as the only recommended method to prevent straighthead in rice and is implemented through the use of DD50 computerized programs in the USA. This prevention practice costs more than $ 7 million annually in Arkansas through the additional use of fuel, labor, and water. This chapter summarizes research efforts to control straighthead on various aspects, including 1) the global impact and causal factors, 2) resistant accessions originating from diverse countries and genetic mapping of four quantitative trait loci (QTL) for the resistance, 3) fine mapping a major QTL that explained up to 67% of straighthead variation in a 290 kb region on chromosome 8 flanked by RM22573 and InDel 27, 4) development of three finely mapped DNA markers, AP3858-1, InDel 11 and InDel 5, that co-segregate with straighthead resistance, and 5) verification these three DNA markers in a global germplasm collection for their reliability to be used in the marker-assisted breeding programs for straighthead resistance.

Last Modified: 8/29/2014
Footer Content Back to Top of Page