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INHERITANCE OF LODGING
COMPONENTS IN MUNGBEAN (VIGNA RADIATA (L.)
WILCZEK)
G. S. S. KHATTAK1*,
I. SAEED AND S. REHMAN
Abstract:
Inheritance of lodging
related traits in mungbean i.e., average inter-nodal length and average
circumference of the main stem were studied using Triple Test Cross
(TTC) technique. Both traits showed highly significant differences among
treatments and between first (P1) and second parent (P2)
of a cross ML-5 x Ramzan used as third tester in the TTC combination.
The traits showed significant total epistasis. (i, and j + l types).
Additive x additive (i type) interactions were non-significant whereas
additive x dominance and dominance x dominance (j and l types)
interactions were highly significant for both traits. This shows the
complex nature of inheritance of lodging components in mungbean. Diverse genetic background of lines is
indicated by the significant epistatic effect contributed by individual
lines for average inter-nodal length and average circumference of the
main stem. In case of average inter-nodal length, the genotypes Var.
6601 and Chakwal 97 contributed major portion of negative and positive
non-allelic interaction, respectively, to the total epistasis of average
inter-nodal length. Genotypes NFM 13-1 and NM 92 imparted major portion
of positive and negative non-allelic interaction, respectively to total
epistasis of average circumference of the main stem. Improvement in
mungbean lodging resistance through breeding for short inter-nodal
length and thick/more circumference of the main stem, bi-parental
hybridization between suitable recombinants in F2 generation
is suggested to produce better genetic combinations through which the
accumulations of desired genes could be achieved for selection in
advanced generation.
1Nuclear Institute for Food and Agriculture (NIFA), P. O. Box 446,
Peshawar, KP, Pakistan
*Corresponding author email address:
gssktt@yahoo.com
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