Submitted to: American Society of Plant Biologists Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: March 1, 2002
Publication Date: June 1, 2002
Citation: Kindiger, B.K. 2002. Poster abstract: Root development in hybrids of Poa arachnifera x Poa secunda. American Society of Plant Biologists Annual Meeting. Abstract No. 383. Interpretive Summary: Abstract Only
Technical Abstract: The generation of haploids is a useful tool for the development of fixed inbred lines or studies focused on nuclear or cytoplasmic inheritance. This research was undertaken to identify the frequency of successful hybridization following crosses between sexual Poa arachnifera x apomictic P. secunda. Typically, P. arachnifera maintains a rhizomatous root system whereas P. secunda maintains a fibrous root system. During the research, four androgenic haploids representing the polyploid P. secudna parent were obtained with varying chromosome numbers. Each of the androgenic haploids exhibited a fibrous root system, characteristic of the P. secunda parent, while all of the true P. arachnifera x P. secunda hybrids exhibited a rhizomatous root system. This study indicates that the fibrous root system of apomictic P. secunda is controlled by nuclear genes and that the genetic inheritance of a rhizomatous root system is dominant over a fibrous root system. In addition, the generation of androgenic haploids offer an opportunity to observe P. secunda germplasm in a P. arachnifera cytoplasm as well as an opportunity to utilize such materials as a breeding resource in a Poa ssp. breeding program.