Browsing by Author "KUMAR, RAMESH"
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ThesisItem Open Access BIOLOGY AND MANAGEMENT OF SEPEDONIUM SPP. DURING THE CULTIVATION OF WHITE BUTTON MUSHROOM(COLLEGE OF HORTICULTURE DR. YASHWANT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY ; SOLAN, 2004) SHARMA, V. P; KUMAR, RAMESHThesisItem Open Access EVALUATION OF SOME TEMPERATE PADISH GENOTYPES FOR DIFFERENT HORTICULTURAL AND QUALITY CHARACTERS(COLLEGE OF HORTICULTURE DR. YASHWANT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY, 2008) SHARMA, RIDHIMA; KUMAR, RAMESHThesisItem Open Access EVALUATION OF TEMPERATE CARROTS FOR YIELD AND QUALITY ATTRIBUTES(COLLEGE OF HORTICULTURE DR. YASHWANT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY, 2007) VASHISHT, PRABHASH; KUMAR, RAMESHThesisItem Open Access GENETIC EVALUATION OF EXOTIC GERMPLASM OF RED CABBAGE (Brassica oleracea var. capitata f. rubra)(UHF,NAUNI, 2019-10) DEEP, NAYAN; KUMAR, RAMESHABSTRACT The present investigation entitled “Genetic evaluation of exotic germplasm of red cabbage (Brassica oleracea var. capitata f. rubra)” was carried out at Vegetable Research Farm, Department of Vegetable Science, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during Rabi season, 2018-19. Twenty eight genotypes including check variety Kinner Red were evaluated to ascertain extent of genetic variability, correlations, path analysis and genetic divergence. The experiment was laid out in randomized block design with three replications. The observation were recorded on days to fifty per cent marketable maturity, number of non-wrapper leaves, head compactness (g/cm3), head color, head shape, gross and net head weight (g), equatorial and polar diameter of head (cm), stalk length (cm), core length (cm), yield per plot (kg) and per hectare (q) and vitamin C content (mg/ 100g). Analysis of variance showed highly significant differences among all the genotypes for all the characters under study. Three genotypes namely EC 890012, EC 890013 and EC 890011 gave higher yield and also performed better for quality and other horticultural traits than Kinner Red. High heritability estimates coupled with high genetic advance were observed for days to fifty per cent marketable maturity, stalk length and core length. Moderate to high heritability along with moderate genetic advance was observed for head compactness, net and gross head weight, polar and equatorial diameter of head, vitamin C content. Net head weight was positively associated with vitamin C content, gross head weight, polar diameter of head, core and stalk length, number of nonwrapper leaves, head compactness, days to fifty per cent marketable maturity, while it had negative significant association with equatorial diameter of head at genotypic level. Among all the traits studied, core length had maximum positive direct effect on net head weight followed by polar diameter, gross head weight, number of non wrapper leaves, vitamin C content and days to fifty per cent marketable maturity. Genetic divergence studies revealed that cluster II accommodated maximum genotypes (13) and cluster I and IV being more diverse, hybridization between genotypes will be more rewarding for getting superior hybrids and transgressive segregantsThesisItem Open Access GENETIC EVALUATION OF NEWLY INTRODUCTED GENOTYPES OF LETTUCE (LACTUCA SATIVA L.)(COLLEGE OF HORTICULTURE DR. YASHWANT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY ; SOLAN, 2009) KAUSHAL, SANGITA; KUMAR, RAMESHThesisItem Open Access STUDIES ON TRIPLE TEST CROSS ANALYSIS IN CUCUMBER (Cucumis sativus L.)(UHF, NAUNI, 2019-01) KUMARI, REENA; KUMAR, RAMESHABSTRACT The present investigation entitled “Studies on triple test cross analysis in cucumber (Cucumis sativus L.)” was carried out at the Experimental Research Farm of Department of Vegetable Science, Dr YS Parmar University of Horticulture and Forestry, Nauni-Solan, Himachal Pradesh during rainy season of 2016 and 2017. During the study, two experiments were carried out. The first experiment was comprised of 45 triple test cross progenies derived by mating 15 lines randomly selected as individual plant progenies from F2 generation of LC-1-1 × K-75. These lines were further mated with three testers namely LC-1-1 (L1), K-75 (L2) and their single cross F1 (L3) to estimate the genetic variation from a cross between two parental lines. The data were subjected to the biometrical analysis by following Triple Test Cross Method of Kearsey and Jinks (1968) to detect epistasis and estimates of additive and dominance components of genetic variance. The second experiment was constituted of 30 hybrid combinations resulted from the crossing of ten lines with three testers of cucumber to identify appropriate cross combinations and to approximate the inbred line performance in F1 combination, using GCA and SCA variances and their effects along with heterosis. The data were subjected to Line × Tester analysis as proposed by Kempthorne (1957). For both the experiments, the observations were recorded on days to first female flower opening, node number bearing first female flower, days to marketable maturity (days), number of marketable fruits per plant, harvest duration (days), fruit length (cm), fruit breadth (cm), average fruit weight (g), yield per plant (kg), total soluble solid (0B), incidence of fruit fly (%), severity of powdery and downy mildew (%) except seed traits in experiment-I. The observations on different seed traits (seed germination, seed vigour index I and II) were recorded only in case of experiment-II. Good quantum of genetic variability has been generated through triple test cross progenies with respect to different traits studied as revealed by the significant analysis of variance. For triple test cross (TTC) analysis the parent viz., P12, P13, P11, P8, P5 (Lines) and L3 followed by L1(Testers), whereas, ttc progenies/cross combinations viz.,P12× L3, P13 × L3, P11 × L3, P11× L1 and P8 × L3manifested high mean values and heterotic effects for marketable fruit yield and found superior for majority of trait under study. Heterotic effects were observed in almost all the characters studied and supported through genetic analysis of the triple test cross (TTC) progenies, where the preponderance of epistasis, additive and dominance components of genetic variation was observed for earliness, marketable yield, quality and insect pest and disease traits. The kind of genetic variance revealed from triple test cross can be exploited by intermating selected individuals in early segregating generations with delayed selection in later generations, diallel selective mating/biparental mating or recurrent selection followed by pedigree method to exploit both additive and non-additive components along with epistasis. The Line × Tester studies concluded that parents UHF-CUC-11, UHF-CUC-13, UHF-CUC-6, UHF-CUC-15, UHF-CUC-8 and Solan Srijan were found superior for majority of traits under study on the basis of their mean performance and general combining ability studies. Cross-combinations UHF-CUC-11 × Solan Srijan, UHF-CUC-13 × Solan Srijan, UHF-CUC-6 × K-75, UHF-CUC-15 × Solan Srijan, UHF-CUC-8 × Solan Srijan and UHF-CUC-7 × Poinsette on the basis of mean performance, specific combining ability and heterosis studies excelled well for all the traits studied. Hence, these parents and cross combination can be tested further at multi-locations before releasing as a substitute of already exiting varieties/hybrids of cucumber and getting transgressive segregants in the later generations