Comparison of S2 progeny and testcross performance in Suwan 5 maize variety: III. Inbred and hybrid development | เธเธฒเธฃเนเธเธฃเธตเธขเธเนเธเธตเธขเธเธงเธดเธเธตเธเธฒเธฃเธเธฑเธเนเธฅเธทเธญเธเธชเธฒเธขเธเธฑเธเธเธธเนเธเธชเธกเธเธฑเธงเนเธญเธเธชเธญเธเธเธฑเนเธงเธเธฑเธเธงเธดเธเธตเธชเธฒเธขเธเธฑเธเธเธธเนเธเธชเธกเธเธฑเธเธเธฑเธงเธเธเธชเธญเธเนเธเธเนเธฒเธงเนเธเธเธเธฑเธเธเธธเนเธชเธธเธงเธฃเธฃเธ 5 : 3. เธเธฒเธฃเธเธฑเธเธเธฒเธชเธฒเธขเธเธฑเธเธเธธเนเนเธเนเนเธฅเธฐเธฅเธนเธเธเธชเธก
2007
Chokechai Aekatasanawan(Kasetsart University, Bangkok (Thailand). Inseechandrasatitya Institute for Crop Research. National Corn and Sorghum Research Center) E-mail:ijscca@ku.ac.th | Noppong Chulchoho(Kasetsart University, Bangkok (Thailand). Inseechandrasatitya Institute for Crop Research. National Corn and Sorghum Research Center) | Amnuay Yothasiri(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Agronomy) | Sombun Techapinyawat(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Science. Department of Genetics)
Objective of this research was to compare the 2 evaluation methods of S2 line per se (S2) and S2 testcross (TC) for inbred and hybrid development in 2 subpopulations of Suwan 5(S)C3(ABC0), Suwan 5(S)C3(F) (AC0) and Suwan 5(S)C3(SF) (BC0). The inbred testers of the TC method were Ki 45 in AC0 and Ki 46 in BC0 subpopulations, respectively. The 10 S5 lines from highest yield selection of each the method of AC0 and BC0 were testcrossed with Ki 45 and Ki 46, respectively. The 20 hybrids of the 2 subpopulations and 4 hybrid checks were evaluated in the 2001 late rainy season at the National Corn and Sorghum Research Center, Nakhon Ratchasima. The S6 lines from the 2 methods of both subpopulations and 4 inbred checks were also evaluated in the same season. In conclusion, both methods were not different in selecting for high-yielding inbreds and hybrids.
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