~ 810 ~ Journal of Pharmacognosy and Phytochemistry 2020; 9(3): 810-815 E-ISSN: 2278-4136 P-ISSN: 2349-8234 www.phytojournal.com JPP 2020; 9(2): 810-815 Received: 15-01-2020 Accepted: 18-02-2020 SK Mohamed Yaseen Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Killikulam, Tamil Nadu, India N Aananthi Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Killikulam, Tamil Nadu, India M Arumugam Pillai Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Killikulam, Tamil Nadu, India D Shoba Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Killikulam, Tamil Nadu, India K Manikandan Department of Soil Science and Agricultural Chemistry, Agricultural College and Research Institute, Killikulam, Tamil Nadu, India V Nirubana Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Madurai, Tamil Nadu, India J Ramalingam Department of Biotechnology, Agricultural College and Research Institute, Madurai, Tamil Nadu, India Corresponding Author: SK Mohamed Yaseen Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Killikulam, Tamil Nadu, India Genetic variability and frequency distribution studies for yield in OsPSTOL1 gene introgressed segregating populations of rice ( Oryza sativa L.) SK Mohamed Yaseen, N Aananthi, M Arumugam Pillai, D Shoba, K Manikandan, V Nirubana and J Ramalingam Abstract During rabi 2019, a field experiment was conducted with F3 populations of two crosses viz., Anna(R) 4 × IR 64 Pup1 and Anna(R) 4 × Samba Mahsuri Pup1 raised in non replicated trial at at Agricultural College and Research Institute, Killikulam and the observation was recorded for eight biometrical traits. High magnitude of variation in the experimental material of the study is reflected by high values of mean and range for all the characters studied. The results indicated that, high phenotypic coefficient of variation was observed as compared to genotypic coefficient of variation, suggesting the environmental influence on the expression of traits and heritability is high for most of the characters. The F3 populations of Anna(R) 4 × IR 64 Pup1 exhibited moderate PCV and GCV for single plant yield, number of productive tillers per plant, number of filled grains per panicle, number of tillers per plant and Anna(R) 4 × Samba Mahsuri Pup1 exhibited high PCV and GCV for single plant yield indicated that high variability among the lines. The F3 populations of Anna(R) 4 × IR 64 Pup1 showed high heritability coupled with high genetic advance as per cent of mean for number of tillers per plant, number of productive tillers per plant, number of filled grains per panicle and single plant yield and Anna(R) 4 × Samba Mahsuri Pup1 for number of productive tillers, panicle length, number of tillers per plant, hundred seed weight, days to fifty per cent flowering, and single plant yield which showed that these characters were controlled by additive gene effects and phenotypic selection for these characters were likely to be effective. Keywords: Rice, Genotypic coefficient of variation (GCV), Phenotypic coefficient of variation (PCV), heritability and genetic advance Introduction Rice (Oryza sativa L.,) is the second most important widely grown cereal crop and it is the staple food for more than half of the world’s population. The world population is predicted to reach nine billion by the year 2050, but already by the year 2035, an estimate of 116 Mt of milled rice will be needed worldwide to meet the increasing in demand (Amegan et al., 2020) [1] . In India, rice is grown in 44.10 million hectares in diverse ecological conditions with an annual production of 105.5 million tonnes and productivity of 2391 kg/ha (Patel et al., 2018) [22] . Rapidly increasing demand due to ever increasing Indian population has forced us to search for another quantum jump in rice production. The projection of India’s rice production target for 2020 A.D is 120 million tones which can be achieved only by increasing the rice production by over 2.0 million tones /year in the coming decade (Rukmini devi et al., 2020) [20] and the increase in food demand may inversely affect, which cause shrinkage of rice cultivable area. Therefore, increasing the crop productivity becomes the main concern in sustaining the rice cultivation. The extent of biotic and abiotic stresses possesses a great threat for getting higher yield of crop production. Among the abiotic stresses, nutrient deficiency a major stress influencing the yield reduction in rice. Phosphorus (P) is an important macro nutrient essential for plant growth and development. Phosphorus deficiency constitutes a major complexity leads to reduced tillering, rate of assimilate production per leaf area and rate of leaf expansion (Radin and Eidenbock, 1984) [24] . Application of fertilizers may solve the problem but it is very expensive and can cause environmental and health problems and therefore, the development of phosphorous deficient tolerant cultivars is one of the most effective and eco-friendly solutions (Nirubana et al., 2019) [20] . However, a major quantitative trait (QTL), Phosphorus uptake (Pup1) has been located on rice chromosome 12 found to be associated with the phosphorus deficiency tolerance (Wissuwa et al., 1998) [30] .