Genetic architecture of quantitative traits and aluminium tolerance in sunflower (Helianthus annuus L.)
| dc.contributor.advisor | Sheoran, R.K. | |
| dc.contributor.author | Vivek Kumar Singh | |
| dc.date.accessioned | 2019-11-29T11:07:43Z | |
| dc.date.available | 2019-11-29T11:07:43Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | The present investigation was carried out to study “Genetic architecture of quantitative traits and aluminium tolerance in sunflower (Helianthus annuus L.)” at Research Farm of Oilseeds Section, Department of Genetics & Plant Breeding, CCS HAU, Hisar, during the Spring-2015, Spring -2016 and Spring 2017 using 50 sunflower genotypes. For accessing aluminium (Al) tolerance in given fifty sunflower genotypes, Al stress screening assay was done to identify the Al tolerant and susceptible genotypes. Sunflower genotypes EC-601861 and NDLR-06 tolerant to Al were crossed to Al susceptible genotypes MR-06 and RHA-298 to determine the nature of inheritance of tolerant. The inheritance of Al tolerance was controlled by single dominant gene that can be easily transferred to desirable lines through backcross breeding programme. All the six generation developed in the proposed investigation were also raised under field conditions to investigate the genetic architecture of yield and its component traits in sunflower. Data were recorded on the following characters viz., days to flowering, days to maturity, plant height (cm), head diameter (cm), stem diameter (cm), seed yield per plant (g), 100-seed weight (g) and oil content (%). Generation mean analysis revealed significant differences for all studied traits. The significant results of scaling test indicating the presence of non-allelic interactions. Most of the characters showed inadequacy to additive-dominance model was subjected six parameter model. Deviation in gene effects was visualized in different crosses. In general, the magnitudes of dominance gene effects were higher than the additive gene effects. Duplicate type of epistasis was observed for most of the traits in all crosses. In the present study, 61 microsatellite markers were used to assess the genetic diversity in sunflower. Out of the 61 primers, 26 primers were found polymorphic. The number of alleles per locus ranged from 2 to 4 with an average of 2.31. Estimates of genetic similarities among the different genotypes ranged from 0.24 (between genotype MSF-1-7 and EC-601875) to 0.92 (between genotype RHA-298 Early and DRSF-160 R) with an average of 0.58, depicting a high level of genetic variation among studied sunflower genotypes. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810136495 | |
| dc.keywords | Al tolerance, Inheritance, Gene Effects, Sunflower | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | CCSHAU | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.subject | null | en_US |
| dc.theme | Genetic architecture of quantitative traits and aluminium tolerance in sunflower (Helianthus annuus L.) | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Genetic architecture of quantitative traits and aluminium tolerance in sunflower (Helianthus annuus L.) | en_US |
| dc.type | Thesis | en_US |