Thumbnail Image

Central Agricultural University, Pasighat

The Central Agricultural University has been established by an act of Parliament, the Central Agricultural University Act, 1992 (No.40 of 1992). The Act came into effect on 26th January, 1993 with the issue of notification by the Department of Agricultural Research and Education (DARE), Govt. of India. The University became functional with the joining of first Vice-Chancellor on 13th September, 1993. The jurisdiction of the University extends to six North-Eastern Hill States viz., Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Sikkim and Tripura, with headquarters at Imphal in Manipur. College of Horticulture & Forestry, a constituent College of the Central Agricultural University, Imphal, Manipur, was established on 7th March 2001 at Pasighat, Arunachal Pradesh on the bank of beautiful river Siang.

Browse

2015 - 20182
Reset filters
Author: Alice, Athiko Kaiya ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on Differential Response of French Bean Genotypes Against Aluminium toxicity in North East Region.
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2018-12-02) Alice, Athiko Kaiya; Pandey, A.K.; Warade, S. D.
    The experiment was conducted in naturally ventilated polyhouse at Vegetable Research Farm, College of Horticulture and Forestry, Central Agricultural University, Pasighat, East Siang, Arunachal Pradesh, India in 15 genotypes of French Bean (Phaseolus vulgaris L.). The experiment was laid out in Completely Randomized Design (CRD) in factorial concept with two factors, the genotype as first factor with 15 genotypes and aluminium as second factor with four levels. Morpho-physiological parameters, quality parameters and soil parameters were recorded after 15 days and 30 days of aluminium application whereas yield parameters were taken at harvesting stage. The genotypes include G1 (Lakshmi), G2 (Swarna Lata), G3 (RCMFB-1), G4 (Mizoram), G5 (Meghalaya), G6 (Tripura), G7 (Pasighat, Arunachal Pradesh), G8 (Mao, Manipur), G9 (Mao, Manipur), G10 (Choinu village, Manipur), G11 (Chandel District, Manipur), G12 (Mayangkhang village, Manipur), G13 (Mayangkhang village, Manipur), G14 (Senapati, Manipur) and G15 (Senapati, Manipur). G15 proved to be most superior for plant height among all the genotypes. For other growth parameters like biomass and dry matter, G1, G10 and G15 were found to be superior and for root length genotypes G1, G2, G14 and G15 were found tolerant to aluminium toxicity. In soil parameters, pH and available P decreased with Al treatment, while extractable Al increased significantly with respect to control. All the yield parameters were significantly reduced due to Al treatment. However, among different genotypes G4, G11, G8, G3 and G15 were found to be superior for yield. Pod length and average pod weight was found superior in G3 and G7. G4 was found superior for number of seed per pod. Among all the genotypes the highest chlorophyll a, chlorophyll b and total chlorophyll content was found in G13. Highest total protein content was found in genotype G1 and highest relative water content was found in G4. However there was significant increase in carotenoid content and highest content was observed in G12. The ROS activity as well as lipid peroxidation was found more prominent in the roots as compared to the shoots and with the increase in aluminium concentration there ROS activity and lipid peroxidation also increases in both shoot and root. High level of ROS and lipid peroxidation was recorded at 40 ppm and 60 ppm when compared with the control (0ppm). Highest superoxide anion (O2.-) content was observed in G9 in shoot and G4 in roots. Hydrogen peroxide (H2O2) content was found highest in G13 in shoots and G3 in roots. The highest value of hydroxyl free radical OH. in shoots was recorded at G14 and in roots as G15. G8 in shoots and G4 in roots recorded the highest lipid peroxidation content. The highest CAT activity was observed in G3 at 30 days in shoot and G8 in roots. G13 recorded the maximum superoxide dismutase (SOD) activity in shoot and G15 in roots. The maximum value of guaiacol peroxidise (GPX) in shoot was recorded G10 and G9 in root. Non-enzymatic antioxidants like ascorbic acid content and vitamin E content was significantly influenced by genotypes and aluminium treatment. At 30 days maximum ascorbic acid content was recorded in Genotype G6 in shoots and G3 in roots. The vitamin E content was recorded maximum in G1 in shoots and G13 in roots. The proline content significantly increased in aluminium treated plants as compared to control. Proline accumulation was found maximum in G12.
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on Genetic variability in chilli (Capsicum annum L.) germplasm through morphological and biochemical markers
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2015-06-25) Alice, Athiko Kaiya; Singh, Vikas; Singh, Barun
    Analysis of variance revealed that significant difference among the genotypes for all the characters. High PCV and GCV, heritability and genetic gain were observed for all the characters except days to 50% flowering. Correlation studies indicated that green fruit yield per plant was positively and significantly correlated with weight of green fruit, weight of ripe fruit, weight of dry fruit, fruit length,fruit girth , fruit pedicel length, number of seed per fruit and dry fruit yield per plant but negative and significant association was established with days to 50% flowering and capsaicin content. Maximimum positive direct effect on green fruit yield per plant was imposed by dry fruit yield per plant, weight of green fruit, fruit length and ascorbic acid content. However, high negative direct effect was observed for weight of dry fruit. Divergence study revealed that number of seed per fruit contributed maximum percent to diversity followed by fruit length, fruit pedicel length, capsaicin content, fruit girth and weight of ripe fruit. Maximum inter cluster distance was observed between cluster IV and VI and indicated that the genotypes within these were highly divergent. SDS-PAGSE analysis showed considerable variation in band number of protein which ranged from 8-18. Protein banding profile showed that the genotype CHFC-50 (A landrace of Pasighat, Arunachal Pradesh) was most distantly related to CHFC-52 (A landrace of Maram, Manipur). Hence, it was recommended that these two genotypes (CHFC-50 and CHFC-52) could be utilized for crossing programme to create more genetic diversity. SDS-PAGE marker data provided more sub grouping and revealed higher amount of diversity as compared to morphological data in present study.