Seed longevity and its association with agronomic traits in wheat (Triticum aestivum L.)

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dc.contributor.advisorKAPILA, R.K.
dc.contributor.authorHARSHITA
dc.date.accessioned2022-02-05T09:29:48Z
dc.date.available2022-02-05T09:29:48Z
dc.date.issued2021-11-12
dc.description.abstractThe present study entitled “Seed longevity and its association with agronomic traits in wheat (Triticum aestivum L.)” was carried out by packing the five wheat varieties of Himachal Pradesh in HDPE bags and storing them under ambient storage conditions using completely randomized block design in seed technology laboratory (August 2020- August 2021) to assess seed longevity in wheat seeds. Following RBD in three replications to evaluate 11 agro-morphological traits, the experimental material was planted in the field during rabi 2020-21. Data recorded over 12 months after fixed bimonthly intervals revealed that most of the seed quality parameters viz., germination per cent- first and final count, rate of germination, field emergence, dry matter of 10 seedlings, vigour index-I and vigour index-II gradually declined, whereas electrical conductivity witnessed an increasing trend with the advancement of storage period. Seed longevity of five wheat varieties of Himachal Pradesh inferred from the germination- final count of the present study revealed maintenance of germination- final count of more than 85% in variety HPW 349 upto 10 months and in other 4 varieties beyond 12 months of storage. Aforesaid varieties were also characterized for DUS traits that revealed 30 out of total 34 descriptors to be more informative in identification and classification of five varieties under study. Field evaluation and further analysis of variance revealed that the mean sum of squares due to genotypes were significant for all the agro-morphological traits except spike length. High heritability (75-100%) coupled with high genetic advance was found for days to 50% heading, plant height, peduncle length, days to physiological maturity, harvest index and number of grains per spike traits. Variety, HPW 249 was the best performing variety for yield and related traits. Correlation of germination after 12 months interval with 11 agromorphological traits revealed a strong and positive association of seed longevity with number of grains per spike, test weight, biological yield per plant, seed yield per plant and productive tillers per plant.Thereby the possibility of designing an ideotype of wheat through selection for more number of tillers per plant, more number of grains per spike and test weight accompanied with higher biological yield per plant and seed yield per plant. Based on association analysis, this study presents an indirect selection criterion based on some easily scorable agro-morphological parameters which have strong association with seed longevity.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810181771
dc.keywordsagronomic,storage, germination,seed,parameters,en_US
dc.language.isoEnglishen_US
dc.pages115en_US
dc.publisherPalampuren_US
dc.subSeed Science and Technologyen_US
dc.themeTo assess seed longevity of wheat varieties of Himachal Pradesh and to establish association of seed longevity with important agronomic traits in wheaten_US
dc.these.typeM.Scen_US
dc.titleSeed longevity and its association with agronomic traits in wheat (Triticum aestivum L.)en_US
dc.typeThesisen_US
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