Indian Society of Genetics & Plant Breeding

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EFFECT OF DWARFING GENES ON YIELD AND YIELD COMPONENTS OF TALL INDIAN WHEAT VARIETIES

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The effects of 3 dwarfing genes Rht 2, Rht 3 and Rht 1, 2 obtained from Tobari 66, Tordo's,
Norin 10, Olesen, 0 6899 and S 948A was studied on the expression of.yleld and yield
components of 4 commercially grown tall Indian wheat varieties K 68, Hybrid 65, NP 846
and NP 876. Though, almost all the dwarfing genes reduced the plant height and enhanced
the expression of grain yield, but the contribution of Rht I, 2 In combination, from the
source 06899 with NP 846 was observed to be the highest (28.3%) followed by Rht 3 gene
from Tordo's source (20.0%) with K 68. However, the Rht 1,2 in combination. The increase
in yield of the dwarf versions of the tall Indian varieties resulted primarily from an increase
in the number of spikes per plant as also from the increase In the number of grains
per spike.
 

Keywords: Dwarfing genes, near-isogenic lines, nonrecurrent parent, Norin 10, yield components.

Info

Year: 1992
Volume: 52
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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