Studies on genetic diversity, combining ability and heterosis for yield and its component traits in Gossypium hirsutum L.

Simple item page
dc.contributor.advisorNirania, K.S.
dc.contributor.authorBankar, Ashish Haridas
dc.date.accessioned2018-04-12T09:46:48Z
dc.date.available2018-04-12T09:46:48Z
dc.date.issued2018
dc.description.abstractThe present study comprising 66 Gossypium hirsutum L. cotton genotypes viz., 50 hybrids along with their fifteen parents and one standard check hybrid (HHH 223) were raised in a randomized block design with three replications during kharif 2016-17 at CCS Haryana Agricultural University, Cotton Research Station, Sirsa. Observations were recorded on ten characters viz., days to first flower (earliness), plant height (cm), number of monopods per plant, number of sympods per plant, number of bolls per plant, boll weight (g), seed cotton yield per plant (g), ginning out turn (%), seed index (g) and lint index (g). Economic heterosis was estimated over standard check HHH 223. Out of fifty, five hybrids viz., H1226 x SR-38 (46.0%) followed by H1300 x Gregg 45 (43.2%), H1098i x PUSA 31 (39.5%), H1300 x PUSA 31 (38.2%) and H1117 x LRA 5166 (30.9%) recorded more than 30 per cent economic heterosis for seed cotton yield per plant and thus need special attention so as to exploit high heterotic values for seed cotton yield in these hybrids. Analysis of variances revealed that the magnitude of SCA variance was greater than GCA variance for all the traits that specified pre-dominance of non-additive gene action. Among fifteen parents; male parents Gregg 45, MESR-17 & SR-38 and female parent H1300 & H1098i were found to be best general combiners for seed cotton yield and its component traits. The best specific combinations were H1117 x LRA 5166, H1226 x SR-38, H1098i x PUSA 31 and H1300 x AVB SM- 277 recorded high heterosis for seed cotton yield and its component traits along with good SCA effects. This was the combination of both good combining parents, one good & one poor combiner parent and both poor combining parents. This indicated that both additive and non-additive gene action were important for this character. Hence, these crosses may be used for future heterosis breeding programme. The result has discussed in the light of their usefulness in future breeding programs.Two hundred and eleven alleles were amplified by using 44 SSR primers. Primer BNL1053 possess maximum PIC value (0.881) specified that this primer show maximum contribution for diversity analysis. Production of more than two SSR bands was a quite common phenomenon in the present study. The reason for usual production of multiple bands was assigning as either presence of SSR alleles with different molecular weight on A & D genome or on more than one linkage group. The NTSYS-pc UPGMA tree cluster analysis revealed that fifteen parental genotypes were quite distinct. At 0.73 similarity index fifteen cotton genotypes were clustered into five groups except two parents which doesn’t fall in any group and separated as out group. The use of genotypes in hybridization from these different groups is likely to produce heterotic combination in future breeding programme.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810043323
dc.keywordsGossypium hirsutum , Economic heterosis, GCA, SCA, Genetic Diversity, SSR markeren_US
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subGenetics and Plant Breedingen_US
dc.subjectnullen_US
dc.themeStudies on genetic diversity, combining ability and heterosis for yield and its component traits in Gossypium hirsutum L.en_US
dc.these.typePh.Den_US
dc.titleStudies on genetic diversity, combining ability and heterosis for yield and its component traits in Gossypium hirsutum L.en_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
CCSHAU-375047-Bankar, Ashish Haridass.pdf
Size:
1.35 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses