PJB-2013-369
LINE X TESTER ANALYSIS FOR GRAIN YIELD AND YIELD RELATED TRAITS IN MAIZE VARIETY SARHAD-WHITE
H. RAHMAN1*, ASIF ALI1, ZAHIR SHAH2, M. IQBAL3, M. NOOR1 AND AMANULLAH4
Abstract
This experiment was carried out at Agricultural University, Peshawar during 2011 to test 15 maize S2 lines of maize variety Sarhad White in test cross combinations. During spring season (February-June) S2 lines of maize variety Sarhad-White variety were out crossed at three isolations with 2 hybrids; WD3×6, Kiramat and an open pollinated variety Jalal. Performance of the resulting testcrosses was evaluated with their parents in July-October. Randomized complete block design with 2 replications was used in the experiment. Parents and crosses for yield traits showed highly significant differences. The traits were further analyzed for general combining ability and specific combining ability effects. Maximum ear length (18.83cm) was produced when S2 Line No.5 was crossed with WD3×6 as a tester. Maximum general combining ability value 1.81 was observed for S2 Line No.2. Least desirable specific combining ability effect was observed for S2 Line No.4 using WD2×8 a tester. Maximum kernel rows ear-1 (17) was observed for test crosses TC_6 and 14, using WD3×6 as a tester. Maximum desirable general combining ability (1.70) was recorded for S2 Line No. 6(1.59). S2 Line No.15 was good specific combiner with testers WD2×8 (1.99) and Jalal (1.81). Heaviest grains were produced by test cross TC_7 (39.5 g), using WD2×8 as a tester. For grain yield S2 line no. 2 was the best general combiner, followed by S2 line 9. For SCA, S2 line 2, 3 and 6 were the best specific combiners when crossed with tester WD2 x 8, Jalal and WD3x6, respectively.
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