After cotton, rice is second export commodity of Pakistan. However,
improvement in Basmati rice has been hampering due to its intrinsic
genetic makeup. Here, we focused on quantitative genetics of some
biometrical traits to understand the convolution of genetic control
over 16 yield and yield components. Line x tester analysis showed
non-additive gene effects for all traits whereas triple test cross
analysis explained non-additive gene effects in the form of j and l
types of non-allelic interactions for 13 traits only. Triple test
cross analysis also explained joint control of j and l types of
epistasis with i type epistasis for the rest of the 3 traits.
Several good combiner lines and crosses suitable for the
development of cultivars or hybrid varieties were isolated. Use of
heterosis breeding, recombination breeding following pedigree
method of selection and recurrent selection/bi-parental mating has
been proposed on the basis of current genetic analysis for the
improvement of Basmati rice."
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