Indian Society of Genetics & Plant Breeding

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COMBINING ABILITY IN THE Fl AND F2 GENERATIONS OF DIALLES CROSS IN MACARONI WHEAT (TRITICUM DURUM DESF.)

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Combining ability analysis in macaroni wheat (Triticum durum Desf.) involving 10 diverse
parents and their 45 Fl and F2 progenies indicated significant differences for gca among the
parents, and for sea in crosses for all the characters studied, exceflt for sca for straw yield in
F2. Additive variance (ifA) was higher than the dominance (cI D) for all the characters,
except for tillers/plant and grain yield, indicating the predominance of additive gene action
for the traits studied. Among the parents, JNK-4W-184, A-9-30-1 and Storck's' were good
general combiners for grain yield and also high to average combiners for most of the yield
components. The cross Cocorit 71 X A·9·3O-1was consistently good specific combiner for
grain yield in both generations. Most of the good specific crosses for grain yield involved
Indian and exotic genotypes. Such crosses could be explored further for improvement in
the grain yield of durum wheat through the combinations of desirable yield components.
Biparental matingand/or multiple crosses are recommended in view of significance of both
additi.ve and nonadditive gene effects to get tangible advancements.
 

Keywords: Dialles cross, combining ability, macaroni wheat, gene action.

Info

Year: 1995
Volume: 55
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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