Population improvement of NS 104
1990
Yodsaporn Chantachum | Charas Kitbamroong | Pichet Grudloyma (Nakhon Sawan Field Crop Research Center (Thailand))
512 S1 lines of maize population NS1(S)C1 were tested in yield trial and downy mildew disease nursery in 1989 early rain season at NSWFCRC. Two sets of 16*16 simple lattice were used for the yield trial and only one replication of the experiments were evaluated for downy mildew disease resistance. Yield range of the progenies averaged from 2 replications were 172-824 kg/rai with the average of 520 kg/rai. Average number of days to 50 % silking were 49 days. Average percentages of downy mildew infection were 55 % where as spreader rows infection were 80.3 % 47 S1 were selected and S2 seeds from downy mildew resistant plants were recombined in to maize population NS1(S)C2F2 or NAC 914. The other maize population NS1(S)C2F2 or NAC 915 were formed by using the remnant seeds of 60 selected S1 lines. One experimental variety were developed by the recombination of 12 selected S1 lines.
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