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

Abstract

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