Estimation of Heterosis, Combining ability and Gene action in Pigeonpea [Cajanus cajan (L.) Millsp.]

Eight cytoplasmic-genetic male sterile lines with A2 (Cajanus scarabaeoides) and A4 (Cajanus cajanifolius) cytoplasm were crossed with 10 testers in a line × tester design. Resultant 80 experimental hybrids were evaluated along with parents and check (Maruti) in lattice design with two replications....

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Bibliographic Details
Published inElectronic journal of plant breeding Vol. 5; no. 2; pp. 173 - 178
Main Authors Lokesha, R, Dharmaraj, P.S, Muniswamy, S, Diwan, J.R
Format Journal Article
LanguageEnglish
Published Indian Society of Plant Breeders 01.06.2014
Subjects
Combining ability
heterosis
hybrids
Line X Testers
Pigeonpea
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Summary:Eight cytoplasmic-genetic male sterile lines with A2 (Cajanus scarabaeoides) and A4 (Cajanus cajanifolius) cytoplasm were crossed with 10 testers in a line × tester design. Resultant 80 experimental hybrids were evaluated along with parents and check (Maruti) in lattice design with two replications. Combining ability analysis evinced predominance of nonadditive gene effects for 10 characters indicating relevance of heterosis breeding for improving yield attributes. The gca effects of parents revealed that ICPA-2078, GT-308A, PKV-TATA, ARCCV-2 and GPHR-08-11 were good general combiners for seed yield and its direct components. The estimates of sca effects revealed that nine experimental hybrids had significant, desirable and positive sca effects for seed yield. The cross combination ICPA-2092 x VIPUL, ICPA-2078 x BSMR-856 and ICPA-2078 x ARCCV-2 were good specific combiners for number of secondary branches, number of pods per plant, seed yield per plant. These parental combinations are being used for exploitation of hybrid vigour.
ISSN:0975-928X
0975-928X