Trait dissection and genetic analysis for heat tolerance in garden pea (Pisum sativum var. hortense)
| dc.contributor.advisor | T.S. Aghora | |
| dc.contributor.author | DEVEN VERMA | |
| dc.date.accessioned | 2020-05-27T06:38:36Z | |
| dc.date.available | 2020-05-27T06:38:36Z | |
| dc.date.issued | 2019 | |
| dc.description | T-10241 | en_US |
| dc.description.abstract | The present investigation was undertaken on “Trait dissection and genetic analysis for high temperature tolerance in garden pea (Pisum sativum var. hortense)” at ICAR- Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru during 2016-2018. The objectives of the research were to screen the garden pea germplasm lines for high temperature tolerance, to identify traits associated with high temperature tolerance in garden pea and to study inheritance of traits conferring tolerance to high temperature. Garden pea is a highly nutritious leguminous cool season vegetable crop, grown all over the world for its fresh as well as dried seeds. The anthropogenic activities around the world has increased the atmospheric CO2, thus, increasing average global temperature. This threatens the area as well as duration for growing of the garden pea. Garden pea germplasm available with ICAR-IIHR was screened for high temperature tolerance at lethal temperature (43°C for 3 hours) followed by induction temperature (30-38°C for 3 hours) using the Temperature Induction Response (TIR) technique. Ten garden pea germplasm lines were found to be tolerant to heat stress at seedling stage by using normal z-distribution for classification of genotypes into tolerant, moderately tolerant and susceptible. The genotypes IIHR 544 and Arka Uttam were found to be tolerant to heat stress at seedling stage. The garden pea lines were sown in field crops summer season of year 2016 (35.3°C/ 22.4°C) and 2017 (31.9°C/ 20.8°C) in Bengaluru, Vegetable Farms, for the identification of traits associated with high temperature tolerance in selected garden pea lines. The results depicted that the traits associated with heat tolerance are pollen viability, per cent pollen germination, pollen tube growth, per cent electrolyte leakage, membrane stability index, pod yield, pod filling percentage and shelling percentage. For all the studied traits heat tolerant lines showed better results as compared to susceptible garden pea lines. The results obtained from the genetic analysis of the inheritance of traits associated with high temperature tolerance showed the prevalence of epistatic interaction governing almost all the characters. Also the type of epistasis prevalent in the cross combinations was duplicate type. Thus, to improve garden pea lines for concerned traits, selection for transgressive segregants from F2 onwards should be taken up to develop heat tolerant, high yielding line in garden pea. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810146537 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Division of Vegetable Crops ICAR-Indian Institute of Horticultural Research Hessaraghatta Lake Post, Bengaluru-5 | en_US |
| dc.sub | Horticulture | en_US |
| dc.theme | Trait dissection and genetic analysis for heat tolerance in garden pea (Pisum sativum var. hortense) | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Trait dissection and genetic analysis for heat tolerance in garden pea (Pisum sativum var. hortense) | en_US |
| dc.type | Thesis | en_US |