Keragaman Genetik Inbrida Jagung QPM dan Normal Berbasis Marka Mikrosatelit dan Hubungannya dengan Penampilan Hibrida

Marcia B. Pabendon, M. Azrai, M. J. Mejaya, Sutrisno Sutrisno

Abstract


Information on genetic divergence of
inbred lines and performance of the hybrids developed from
the lines is a great value in maize hybrid program. A study
was conducted to evaluate genetic diversity of six QPM and
five normal maize inbred lines, to determine the relationship
between genetic distance based on SSR markers and the
grain yield of single cross hybrid, and to get information
promising hybrid from the single cross of QPM hybrid.
Twenty four polymorphic primers that covered the 10 maize
chromosomes were used to fingerprint the lines, detecting
in 94 alleles (average of 3.9 and a range of 2-6 alleles per
locus). Genetic divergences were determined using the
Jaccard’s similarity coefficient, and a dendrogram was
constructed using the UPGMA. Cluster analysis divided the
inbreds into two clusters that were confirmed by principal
coordinate analysis. Two promising QPM hybrids that are
crossed from different heterotic group were found. The
estimated value of simple correlations (r) of GDs with the
gain yield of single cross hybrid was negatif (-0.07). There is
a need to conduct more field trials to obtain more accurate
correlations, particularly in a practical utility for predicting
maize hybrid performance for grain yield.


Keywords


Maize; QPM and normal inbreds; SSR; genetic distance; hybrid performance.

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DOI: http://dx.doi.org/10.21082/jbio.v4n2.2008.p77-82

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P-ISSN : 1907-1094
E-ISSN : 2549-1547


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