Relative efficiency of various single plant selection criteria and F3 generation yield testing in wheat (Triticum aestivum)
2003
Singh, T | Balyan, H.S. (Ch. Charan Singh University, Meerut (India). Department of Agricultural Botany)
The relative efficiency of the various single F2 plant selection criteria was evaluated in three F2 population of wheat (Triticum aestivum L). The criteria considered were: (i) Selection for high as well as low values of seven individual plant traits (grain Yield per se, plant high, grains per spike, 100 grain weight, tiller number, biological yield and harvest index),(ii) Selection of single plants based on an index involving greater values of the above seven traits then their means of the population, and (iii)Random selection, in association with or without yield testing in the F3 generation. The generation of the parent F2 plant (s) of each of the ten highest yielding F3 that (I) selection of plants in F2 population on the basis of a single trait was relatively more effective than selection of random while selection of based on the index was ineffective, (II) selection of plants with higher expression of trait (s) resulted into 75% of the highest yielding F4 bulk progenies,(III) selection of individual plants in F2 generation based on biological yield followed by grain yield per se proved most effective, and (iv) the yield testing in F3 generation was only moderately efficient in identification of high yielding F4 bulk progenies.
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