Heterosis of certain important yield components in the population wheat (Triticum aestivum L.) crosses
Keywords: Wheat, heterosis, heterobeltiosis, grain yield, yield components.
AbstractHeterotic and heterobeltiotic performances of 10 F1s obtained from half-diallel crossings of 5 commercial varieties were
evaluated for plant height, number of tillers per plant, spike length, number of spikelets per spike, flag leaf area and number of
grains per spike. The highest negative heterosis and heterobeltiosis were recorded in Daman-98 x Sehar (-7.74) for plant height.
Daman-98 x Zam-04 showed maximum positive heterosis (44.05) whereas Daman-98 x Shafaq showed maximum positive
heterobeltiosis (34.85) for number of tillers per plant. For spike length maximum heterosis and heterobeltiosis values were 38.40
and 31.26, respectively, for the hybrid Sehar x Gomal-08. Similarly for number of spikelets per spike maximum heterosis and
heterobeltiosis were 45.66 and 42.59 for the cross Daman-98 x Gomal-08. Heterotic study for flag leaf area revealed that
maximum positive heterosis for Daman-98 x Sehar (21.22), maximum positive heterobeltiosis for Daman-98 x Gomal-08
(18.01). Maximum positive heterosis was recorded for Daman-98 x Gomal-08 (33.32), whereas positive heterobeltiosis were
found for Daman-98 x Gomal-08 (19.43) for grains per spike. The results revealed that the hybrid combinations Daman-98 x
Gomal-08 and Daman-98 x Sehar could be recommended for improved yield and enhanced biological production of wheat,
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