Description:
F4 flowering plants from crosses of 30 photoperiodic primitive accessions (TEX 28, 118, 184, 231,258, 266, 306, 310, 311,325,342,378,480,604,693,695,717,760,1015, 1055, 1076, 1130, 1203,1237, 1333, 1354, 1369, 2167, 2431, and 2434) with DP61 were crossed with four cultivars (SG10S, DP393, FM958, and ST474) and beginning with these F1 were randomly intercrossed and harvested by cultivar parent for 5 cycles. Equal numbers of C4S1 see of the 4 families were bulked for RMPAP-C4.