Heterosis and Combining Ability in Opium Poppy [Papaver somniferum (L.)]
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Date
2023-08
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MPUAT, Udaipur
Abstract
Line × Tester analysis was carried out in Opium Poppy (Papaver somniferum
L.) to study the combining ability and heterosis for seed yield and attributing
characters. The experimental material comprised of 77 entries including 54 hybrids
along with 21 parents and 2 checks viz., Chetak Aphim and JOP-540. A complete set
of 77 genotypes were planted in randomized block design and replicated thrice at
Instructional farm, Rajasthan College of Agriculture, Udaipur during Rabi 2022-2023.
The analysis of variance revealed the presence of considerable variability
among parents and crosses for the characters studied. Among lines, UOP-145, UOP-
70, UOP-93 and UOP-179 were the best performing lines for yield and attributing
characters. Among testers, UOP-79 and UOP-80 exhibited good performance for all
the traits. The cross UOP-78 × UOP-20 exhibited significant positive economic
heterosis, maximum relative heterosis and heterobeltiosis for seed yield per plant over
the best check Chetak Aphim.
Combining ability analysis revealed that the magnitude of sca variance were
higher than gca variance for all the characters studied, emphasizing preponderance of
non additive gene action. UOP-154 was found to be a good general combiner for seed
yield per plant, harvest index for seed yield, capsule husk yield per plant, diameter of
main capsule, capsule size, number of stigmatic rays per capsule and number of plant
height. Line UOP-88 was observed to be a good general combiner for capsule size
and number of effective capsules per plant and UOP-95 showed good gca for days to
maturity and peduncle length. Among testers, UOP-20 was found to be good general
combiner for plant height, UOP-30 for capsule husk yield per plant and UOP-80 for
diameter of main capsule The significant positive sca effects for different characters were exhibited by
many crosses and for seed yield per plant was exhibited by six crosses, of which cross
UOP-78 × UOP-20 possessed high positive specific combining effects, high per se
performance and significant economic heterosis, emphasizing preponderance of non
additive gene action. Thus, this cross may be exploited for hybrid vigour or may be
advanced for varietal development.
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Aparna S. and Dadheech. A