Indian Society of Genetics & Plant Breeding
The relative efficiency of the various single F2 plant
selection criteria was evaluated in three F
2 populations
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 height,
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 than their means of the population, and (iii)
random selection, in association with and without yield
testing in the Fs generation. The selection pattern of the
parent F2 plant(s) of each of the ten highest yielding Fs
selected F4 bulk progenies and F4 bulk progenies revealed
that (i) selection of plants in F2 populations on the basis
of a single trait was relatively more effective than selection
at random while selection based on the index was
ineffective, (ii) selection of plants with higher expression
of trait(s) resulted into 75% of the highest yielding F4
bull. 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 Fs generation was only moderately efficient in
identification of high yielding F4 bulk progenies.
Keywords: Wheat, selection criteria, biological yield, grain yield per 5e, F3 yield testing
Year: 2003
Volume: 63
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
Tejbir Singh and H. S. Balyan info_circle
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