Record Details

Potential use of random and linked SSR markers in establishing the true heterotic pattern in maize (Zea mays)

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Potential use of random and linked SSR markers in establishing the true heterotic pattern in maize (Zea mays)
Not Available
 
Creator Sumit Kumar
Abhijit Kumar Das
Ritu Naliath
Ramesh Kumar
Chikkappa G. Karjagi
J.C. Sekhar
Mukesh Vayas
K. R. Yathish
Alla Singh
Ganapati Mukri
Sujay Rakshit
 
Subject BLUP, diallel cross, heterotic grouping, linked SSR, maize, random SSR, SCA, yield.
 
Description Not Available
Context. Establishment of true heterotic pattern in maize germplasm can increase the efficiency of
hybrid breeding. Heterosis is dependent on the genetic diversity of parents and the extent of
dominance at different loci. Estimation of genetic diversity through use of molecular markers is
routine practice in maize breeding. Aims. The present study was designed to test whether
simple sequence repeat (SSR) markers linked to yield-contributing traits are more reliable for
heterotic grouping than random SSRs. Methods. Diallel crosses developed among 19 inbred
lines were evaluated at multi-locations. The genotypes were also grouped using polymorphic
random (50) and linked (47) SSRs. Key results. The crosses generated with lines belonging to
different heterotic groups of linked SSR markers did not reveal any superiority over the crosses
of the diallel set. By contrast, mean performance of inter-heterotic group crosses generated on
the basis of random markers was superior to that of intra-heterotic crosses. Specific combining
ability effects did not reveal any significant association with genetic distance of random or linked
markers. Conclusions. The lack of improved efficiency of linked markers over random markers
can be attributed to factors including the quantitative nature of the trait, genotype ×
environment interactions, genetic background of germplasm in which the markers are
expressed, and multiple alleles. Implications. Markers linked to yield-contributing traits are no
more reliable for heterotic grouping than random markers
Not Available
 
Date 2023-02-22T06:01:57Z
2023-02-22T06:01:57Z
2022-07-01
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/76295
 
Language English
 
Relation Not Available;
 
Publisher Not Available