Identifying potential F1 hybrid combinations based on the parental diversity
can increase the breeding efficiency and saves the opportunity cost of time.
In this work, the genetic diversity between eggplant genotypes was measured
by Mahalanobis D2 statistics and Sequence Related Amplified Polymorphism
(SRAP) molecular markers. The genetic distances (GD) were correlated with
heterosis and trait wise mean performance of F1 crosses generated in a line
? tester mating design for prediction of F1 performance for agronomically
important traits. The cluster analysis performed based on the Mahalanobis D2
distance grouped all the eleven genotypes into two clusters and three
clusters were formed based on the SRAP marker data. The polymorphic
information content value generated by the 30 SRAP marker combinations
ranged from 0.09 to 0.77 with a mean value of 0.38. For yield, the F1
combinations exhibited the mid parent heterosis ranged from 3.99% to 83.34%
and the heterobeltiosis from -35.67% to 57.19%. GD based on both phenotypic
values and molecular marker data successfully predicted the heterotic
patterns in the number of fruits per plant and other fruit morphological
traits such as fruit length and fruit breadth which is a significant outcome
of the study. A multiple linear regression model that included GD, GCA and
SCA was more significantly correlated with heterosis for fruit yield than
any genetic parameter alone.
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