EFFECT OF SEMI-DWARFISM ON YIELD AND YIELD COMPONENTS IN WHEAT (TRITICUM AESTIVUM L.)

Abstract

Yield and yield component studies were conducted for semi-dwarf wheat genotypes.
The yield comparison showed that line 03 (525 g) had the highest grain yield per plot
compared with other lines and tested varieties. This could be due to early heading date
and increased number of grains per spikelet. The subsequent lines of higher grain
yields were 15 (512.5 g), 01 (462.5 g), 14 (462.5 g), 5 (437.5 g), 9 (412.5 g) and 13
(425 g). The better number of grains per spikelet (fertility) was the second reason
beside the early heading date for high grain yield of line 15. The higher grain yield in
line 1 could be due to medium heading date, higher number of spikelets per spike and
increased number of grains per spike. The combined correlation studies suggested that
plant height had positive and highly significant correlation with spike length, number
of spikelets per spike and main spike grain yield. Spike length had positive and highly
significant correlation with number of spikelets, number of grains per spike and main
spike grain yield. Number of spikelets per spike had positive and highly significant
correlation with number of grains per spike and main spike grain yield. Number of
grains per spikelet had highly significant negative correlation with spike length and
number of spikelets per spike. Grain yield of main spike is a very important character
which had highly significant positive correlation with characters plant height, spike
length, number of spikelets per spike and number of grains per spike.