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Author: Agnihotri, Roshni ×

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    ThesisItemOpen Access
    Performance of various Turfgrass Genotypes Under South Gujarat Agroclimatic Condition
    (Floriculture and Landscaping Department, Aspee College of Horticulture and Forestry Gujarat Agriculture University, Navsari, 2015-04) Agnihotri, Roshni; Chawla, S. L.
    culm length, shortest average diameter, leaf length, highest shoot stolon - internodal density and slowest VLGR were recorded in Zoysia tenuifolia. Maximum cumulative fresh and dry clipping yield, narrowest leaf width and smallest value of average stolon internodal length were registered in C. dactylon x C. transvaalensis Tifdwarf. S. secundatum showed lowest shoot root ratio. C. dactylon L. 'Panam' recorded maximum number of floret per spikelet. C. dactylon 1. x C. transvaalensis 'Tifdwarf, C. dactylon L. 'Local', A. compressus, S. secundatum and E. ophiuroides displayed prostrate growth habit. Z. tenuifolia, Z. matrella and C. dactylon L. x C. transvaalensis Tifdwarf showed very fine texture of leaves. C. dactylon L. x C. transvaalensis Tifdwarf showed consistently good average colour rating, aesthetic appearance, turfing ability, turf quality and turf intensity ratings in the whole period of experimentation. This genotype also showed highest total chlorophyll content in all seasons. Z. tenuifolia was estimated to require least number of mowing . • Maximum available soil nitrogen, phosphorus and potassium content was recorded from the plots of Z. tenuifolia, however, C. dactylon 1. x C. transvaalensis 'Tifdwarf recorded lowest available soil N, P and K contents. Minimum cumulative weed population was observed in S. secunda tum which was followed by A. compressus.
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    ThesisItemOpen Access
    Performance of various turfgrass genotypes under south Gujarat agro-climatic condition
    (FLORICULTURE AND LANDSCAPE ARCHITECTURE DEPT., ASPEE COLLEGE OF HORTICULTURE AND FORESTRY, NAVSARI AGRICULTURAL UNIVERSITY, NAVSARI, 2015-04) Agnihotri, Roshni; Chawla, S.L.
    The present study entitled “Performance of various turfgrass genotypes under south Gujarat agro-climatic condition” was carried out during February - 2014 to February - 2015 at Floriculture Research Farm, ASPEE College of Agricultural Horticulture University, and Forestry, Navsari, Navsari Gujarat. The experiment was conducted on thirteen warm season turfgrass genotypes which was laid out in a randomized block design and replicated thrice. The tested genotypes included Cynodon dactylon L. (‘Selection-1’, ‘Local’, ‘Black Jack’, ‘Bargusto’, ‘Panama’, ‘Palna’, ‘Panam’) and C. dactylon × C. transvaalensis ‘Tifdwarf’, Zoysia matrella, Zoysia tenuifolia, Stenotaphrum secundatum and Eremochola ophiuroides. Fastest new growth appearance (50 %), deepest root and establishment rate (90 %) were observed in C. dactylon L. 'Local', while establishment rate was at par with C. dactylon × C. transvaalensis 'Tifdwarf'. Lowest canopy height, culm length, shortest average stolon internodal diameter, leaf length, highest shoot density and slowest VLGR were recorded in Zoysia tenuifolia. Maximum cumulative fresh and dry clipping yield , narrowest leaf width and smallest value of average stolon internodal length were registered in C. dactylon × C. transvaalensis 'Tifdwarf'. S. secundatum showed lowest shoot root ratio. C. dactylon L. ‘Panam’ recorded maximum number of floret per spikelet. C. dactylon L. × C. transvaalensis 'Tifdwarf', C. dactylon L. 'Local', A. compressus, S. secundatum and E. ophiuroides displayed prostrate growth habit. Z. tenuifolia, Z. matrella and C. dactylon L. × C. transvaalensis 'Tifdwarf' showed very fine texture of leaves. C. dactylon L. × C. transvaalensis 'Tifdwarf' showed consistently good average colour rating, aesthetic appearance, turfing ability, turf quality and turf intensity ratings in the whole period of experimentation. This genotype also showed highest total chlorophyll content in all seasons. Z. tenuifolia was estimated to require least number of mowing. Maximum available soil nitrogen, phosphorus and potassium content was recorded from the plots of Z. tenuifolia, however, C. dactylon L. × C. transvaalensis 'Tifdwarf' recorded lowest available soil N, P and K contents. Minimum cumulative weed population was observed in S. secundatum which was followed by A. compressus. Molecular characterization of all the genotypes were performed by RAPD and ISSR molecular markers. Out of 150 decamer random primers used for initial screening, 6 primers were used for characterization. 6 primers yielded a total of 80 scorable bands, of which all of them were polymorphic. The highest genetic similarity coefficient (0.395) was observed between C. dactylon L. ‘Bargusto’ and C. dactylon L. ‘Palma’, while, lowest genetic similarity (0.029) was recorded between C. dactylon L. ‘Panama’ and C. dactylon L. × C. transvaalensis 'Tifdwarf'. In ISSR a total of 17 primers were screened, of which 6 gave clear amplification pattern. A total of 76 scorable bands in size ranging from 150bp to 1400bp and showed 100 per cent polymorphism. Highest Jaccard’s genetic co-efficient (0.750) was observed between C. dactylon L. ‘Bargusto’ and C. dactylon L. ‘Panama’, while, lowest genetic similarity co-efficient (0.085) was recorded between C. dactylon L. ‘Local’ and S. secundatum. Combined dendrogram genarated using RAPD and ISSR data was generated that signifies overall genetic relationaship among the turfgrass genotypes and corresponded well with dendrogram of ISSR. The Principal Coordinated Analysis was performed on three dimension which grouped genotypes according to the combined dendrogram.