Indian Society of Genetics & Plant Breeding

Important

EVALUTION OF HETEROSIS IN FIVE SETS OF DESI COTTON HYBRIDS

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Sixty eight dcsi "otton hybrids were developed by crossing 30 genotype.~ selected from five
groups of
Gussypium arboreum races benga1ense and indicum and G. herbaceum. In each
group, IS hybrids were created by diallel mating (without reciprocals). Interspecific
crosses between two varletics each of G.
arboreum races benga1ense and indicum were also
made with. two G.
herbaceum strains obtaining eight hybrids. Studlcs Indicated that
interspecific crosSlS exhibited higher magnitude of useful heterosis for seed cotton yield as
compared
to the intra racial hybrids tested in four groups. Negative heterosis for ginning
out turn and halo length was shewn by interspecific crosses. Intra racial hybrids of red x
red
(G. arboreum race benga1ense) varieti.cs also expressed higher magnitude of heterosis
effect for
seed cotton yield. Dwarf x dwarf hybrids expressed high heterosis for yield and
halo length, but negative heterosis for ginning out turn. Crosses within the race
indicum
registered ~bstantial heterosis for all characters under study.  

Keywords: Desi cotton hybrids. interspecific hybrids. intra bengalense hybrids. heterobeltiosis. useful heterosis.

Info

Year: 1990
Volume: 50
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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