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Title: Registration of the Ki14 × B73 recombinant inbred mapping population of maize

Author
item PRATT, RICHARD - New Mexico State University
item Holland, Jim - Jim
item Balint-Kurti, Peter
item COLES, NATHAN - North Carolina State University
item ZWONITZER, JOHN - North Carolina State University
item CASEY, MARK - The Ohio State University
item McMullen, Michael

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/7/2014
Publication Date: 3/27/2015
Citation: Pratt, R., Holland, J.B., Balint Kurti, P.J., Coles, N., Zwonitzer, J., Casey, M., Mcmullen, M.D. 2015. Registration of the Ki14 × B73 recombinant inbred mapping population of maize. Journal of Plant Registrations. 9(2):262-265.

Interpretive Summary: In this work we developed a maize mapping population from a cross between the exotic Thai line Ki14 and the temperate adapted line B73. We provide both the seed of 119 recombinant inbred lines from this cross and the genotypic data required for mapping. We show that this population is suitable for identifying genetic loci associated with variation in a number of traits including disease resistance and time to flowering.

Technical Abstract: The Ohio Agricultural Research and Development Center released Ki14 × B73 (KB) maize (Zea mays L.) mapping population, a set of 119 recombinant inbred lines (RILs), in March 2007. The mapping population was derived from a biparental cross between inbreds Ki14 (NCRPIS accession Ames 27259) and B73 (Reg. No. PL-17, PI 550473). Ki14 (previous designation KIU1414) was released by Kasetsart University, Thailand in 1975 (Chutkaew et al., 1997). B73 was selected from advanced recurrent selection population (cycle five; C5) of Iowa Stiff-Stalk Synthetic (BSSS) and released by Iowa State University in 1972 (Russell 1972). The parents are of tropical and temperate (U.S. Corn Belt) origin, respectively. The KB RIL population has been used for mapping quantitative trait loci associated with host-resistance to foliar pathogens and in studies to examine the genetic control of photoperiod sensitivity and will be a useful resource for additional genetic studies. It is also envisioned that the high level of host-resistance displayed by parent Ki14, and agronomic performance of parent B73, will invite use of the population as a germplasm source for improved host-resistance of temperate zone maize and for increased yield potential of tropical zone maize. The genetic marker data include 839 (765 SNP and 74 SSR) markers genptyped on all the RILs andplaced on the genetic map (Coles et al, 2009). Phenotypic data were obtained for three important foliar diseases impacting maize production-southern corn leaf blight (SCLB), gray leaf spot (GLS), and northern corn leaf blight (NCLB- Zwonitzer et al, 2009), and three traits associated with maturity-days to anthesis (DTA), days to silking (DTS), and anther silk interval (ASI). Plant height (PH) and ear height (EH), also were recorded (Coles et al 2010).. The registration of the RIL mapping population will allow public access to this germplasm resource for continued mapping, gene discovery, and plant breeding.