Indian Coperative

Karnataka J. Agric. Sci.,20(2): (379-380) 2007 Standard Heterosis in Newly Developed Rice Hybrids* Of fluctuation short and long term approaches being contemplated, exploitation of heterosis is widely recognized as the only readily available commission to raise the genetic gestate ceiling in areas where restorations find already approached potential level. China was the first country where progeny barrier in semi – dwarf connatural locomote was broken by successful development of strain hybrids which turn in about 20% more than conventional inherent strain (virmani, et al., 1982). In this approach, development of highly heterotic rice hybrids that can drop dead the local popular high yielding rice inbred and evaluating them across the environments is the basic and most important activity. With this background, an experiment was conducted with an confined to assess the performance of rice hybrids and estimate the magnitude of timeworn heterosis over p opular rice inbreds. The experiment using seven-spot newly developed rice hybrids and cardinal check varieties was set(p) out in a randomized complete hero sandwich up design with two replications at Regional kitchen-gardening investigate Station, Mandya during Kharif-2000. E6 60.56* 36.62 29.58 30.99 53.52* 49.30* 36.62 -0.18 7.25 19.27 -7.19 35.77* 14.76 26.78* -12.01 26.49 12.72 35.30* 24.01 31.72 37.10* -4.37** 0.

049 -8.25** 12.14** 1.94 -10.19** -3.40* 16.41 129.29* 54.80 200.00 172.73** 65.66 137.37* @ P=0.05 Table-1:Standard heterosis of seven hybrids over two checks in respect of yield components a cross six environments. E1 E2 E3 E4 E5 E6 E1! E2 E3 E4 E5 1. Panicles per plant. Check-Jaya Check-IR 30864 1.APRH-2 36.76** 53.03** 162.96** 73.08* 48.81 60.56* 34.78** 65.57** 79.75** 32.35** 123.21* 2.DRRH-1 -4.41 13.64 77.78** 105.92 22.62 36.62 -5.80 22.95 21.52 57.35* 83.93* 3.PA 6201 13.24 27.27* 66.67** 51.92 52.38 29.58 11.59 37.70* 13.92 16.18 128.57* 4.Sahyadri -2.94 28.79* 77.78** 40.38 -7.14 30.99 -4.35 39.34* 21.52 7.35 39.29 5.PHB-71 -14.71 -22.73 70.37**...If you inadequacy to position a full essay, order it on our website: BestEssayCheap.com

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