Christopher Proud1, Jaquie Mitchell1, Bradley Campbell1, Zuziana Suzanti1,2, Ian Godwin1, Ben Ovenden3, Peter Snell3 and Shu Fukai1
1 The University of Queensland, School of Agriculture and Food Sciences, St Lucia, QLD, 4072, Email: firstname.lastname@example.org, 2 Indonesian Centre for Rice Research, Agency for Agricultural Research and Development,Jalan Raya 9 Sukamandi, Subang, West-Java.3 Department of Primary Industries, Yanco Agricultural Institute, Yanco, 2703, NSW, Australia.
The occurrence of low temperature (15-19oC) events particularly during the young microspore stage (YMS) is a major constraint facing the temperate rice industry leading to reduced fertility and yield. A series of experiments have been conducted to improve our understanding of low-temperature tolerance in terms of underlying physiological mechanisms and the molecular basis of traits involved in low-temperature tolerance at the YMS in populations pertinent to the Australian breeding program. Our research has identified that anther dehiscence is a floral trait critical to ensuring low-temperature tolerance. Single nucleotide polymorphisms (SNPs) were identified utilising genome wide association analysis with 6 putative QTL identified for spikelet sterility that co-located with number of dehisced anthers. The use of putative markers for spikelet fertility and underlying floral traits will lead to increased efficiency in breeding for low-temperature tolerance in rice.