Combining ability of strains and cultivars of spring triticale and heterosis effect of F1 hybrids
Halina Góral
kfhrin@urk.edu.plKatedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza w Krakowie (Poland)
Stanisław Węgrzyn
Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Ludwik Spiss
Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza w Krakowie (Poland)
Abstract
Grain yield and its components were investigated in spring triticale F1 and F2 hybrids and in their parental forms in two field microtrials in two locations differing in soil quality in 1999, and in one location in 2000. The hybrids were obtained as a result of two series of crosses conducted in a factorial design: of seven females with four males in 1999 and five females with three males in 2000. The heterosis effect and combining ability of parental forms were determined. Differences within parents, hybrids, and in the contrast of parents vs. hybrids were highly significant. The grain yield heterosis in F1 hybrids was frequent and high. For individual hybrids the better parent heterosis ranged from -1.4% to 53.6% and averaged 23.3% in 1999 and 15.4% in 2000. No heterosis was observed in the F2 generation. The heterosis of grain yield resulted from heterosis of the number of ears per plot, number of grains per ear and 1000 grain weight. It depended significantly on the general and the specific combining ability of parental forms.
Supporting Agencies
Keywords:
combining ability, heterosis, spring triticaleReferences
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Authors
Halina Góralkfhrin@urk.edu.pl
Katedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza w Krakowie Poland
Authors
Stanisław WęgrzynInstytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
Authors
Ludwik SpissKatedra Hodowli Roślin i Nasiennictwa, Akademia Rolnicza w Krakowie Poland
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