Indian Society of Genetics & Plant Breeding

Genetic distance based on simple sequence repeats and its relationship to specific combining ability and heterosis in maize (Zea mays L.)

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Genetic relationship among ten maize inbred lines derived
from four different source populations was assessed using
forty microsatellite markers. Correlations were estimated
between Simple Sequence Repeat (SSR) markers based
genetic distance with F1 hybrid performance, midparent
heterosis and combining ability for grain yield, days to
silking and plant height. The genetic distances based on
SSRs were almost congruent with pedigree information
and depicted positive linear relationship with F1 hybrid
performance, heterosis value and specific combining
ability for grain yield. From the present results it is
concluded that the Jaccard similarity coefficient based
on SSR data might be used for determining genetic
relationship among inbred lines. Although positive relation
was revealed between genetic distance and midparent
heterosis in this analysis but due to its low magnitude it
couldn’t be used to precisely predict the F1 hybrid yield

Keywords: Maize, genetic distance, SSRs, heterosis, combining ability, Zea mays


Year: 2008
Volume: 68
Issue: 2
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906


G. K. Jha info_circle

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