Inheritance of stem solidness was studied in common
wheat using three crosses involving a solid stemmed
genotype Selection 1093-1 and hollow stemmed stocks,
HD 2667, NP 12 and selection 111. The internodes of two
F
1 hybrids were solid completely filled with pith, while
one hybrid produced internodes with partially filled pith.
Stem solidness in selection 1093-1 is a dominant trait
inherited monogenically. However, incomplete dominance
of solidness was also recorded in the cross Sel. 1093-1
x Sel. 111. The presence of an epistatic gene for hollowness
over gene governing solidness of stem reported to be
present in D genome of hollow stemmed cultivars is
negated. Differences in means between solid and hollow
stemmed true breeding and segregating F3 families were
non-significant. However, significant mean difference in
grain number/main spike were noted in true breeding solid
and hollow families, whereas in segregating families the
two means did not differ significantly. It is presumed that
significant differences in grain number/main spike in true
breeding solid and hollow families may be due to
inadvertent selection which favored high grain number in
hollow families. The identification of single gene governing
solidness of culm may be a useful marker trait for genetic
studies and in breeding for saw fly resistance since
solidness of culm does not affect agronomic traits. The
gene symbol Sc is proposed for solidness of culm in
wheat
Keywords: Wheat, stem solidness, hollowness, genetic marker, agronomic traits
Year: 2006
Volume: 66
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
S. M. S. Tomar, Sudha K. Nair, Renu Singh, Vinod and Bhanwar Singh info_circle