Methods and Compositions for Gray Leaf Spot Resistance in Corn

A method of introgressing a Gray Leaf Spot (GLS) resistance QTL allele into a corn plant comprising:

• a) screening a population with at least one nucleic acid marker to determine if one or more corn plants from the population comprise(s) an allele of said marker associated with a Gray Leaf Spot (GLS) resistance QTL selected from the group consisting of QTL numbers 1-9, 14-33, 35, 38-42, 44-52, 54-61, 63-71, 73-79, 81-92, 95-96, 99-106, 108-117, and 119-178 as provided in FIG. 1;
• and
• b) selecting from said population at least one corn plant comprising an allele of said marker associated with a Gray Leaf Spot (GLS) resistance.

An isolated nucleic acid molecule for detecting a molecular marker representing a polymorphism in corn DNA, wherein said nucleic acid molecule comprises at least 15 nucleotides that include or are immediately adjacent to said polymorphism, wherein said nucleic acid molecule is at least 90 percent identical to a sequence of the same number of consecutive nucleotides in either strand of DNA that include or are immediately adjacent to said polymorphism, and wherein said molecular marker is selected from the group consisting of SEQ ID NOs:

• 1-26, 28-62, 64-70, 72-120, 122-140, 142-156, 158-172, 174, 176, 178-187, 189-219, 221-223, 225-233, 235-247, 249-251, 253-377, 379, 380, 382-409, 411-439, 441-459, 461-478, 481-532, 534-581, 583-584, 586-638, 640-720, 722-726, 728-732, 734-745, 747-767, 769-772, 774-939, 941-1052, 1055-1121, 1123-1185, 1187-1233, 1304 through SEQ ID NO:
• 1331, 1360, and 1361.