CONTENTS PART I : PLANT SCIENCES Combining Ability and Heterosis over Locations for Yield and Yield Components in Hybrid 1 Rice (Oryza sativa L.) T. VIRENDER JEET SINGH, CH. DAMODAR RAJU, Y. CHANDRA MOHAN, R. JAGADEESHWAR, M. BALRAM and L. KRISHNA Effect of Potassium and Foliar Nutrition of Secondary (Mg) and Micronutrient (Zn & B) on 11 Yield Attributes and Yield of Bt -Cotton D. SWETHA, P. LAXMINARAYANA, G. E. CH. VIDYASAGAR, S. NARENDER REDDY and HARISH KUMAR SHARMA Economic Threshold Level (ETL) of Stem Girdler Obereopsis brevis Swedenbord in Soybean 22 KANJARLA RAJASHEKAR, J. SATYANARAYANA, T. UMAMAHESHWARI and R. JAGADEESHWAR Polymorphic SSR Markers among Oryza sativa cv. Swarna and its derived advanced 27 backcross lines with wild introgressions from O. nivara N.P.S. DE SILVA, B. KAVITHA, M. SURAPANENI, A.K. RAJU, V.G. SHANKAR, D. BALAKRISHNAN, S. NEELAMRAJU, S.N.C.V.L PUSHPAVALLI and D. SRINIVASA CHARY Evaluation of BC1F1 plants developed by MAS for BLB resistance in Rice 38 B.EDUKONDALU , V. GOURI SHANKAR , P. REVATHI, D. SAIDA NAIK and D. SRINIVASA CHARY PART II : SOCIAL SCIENCES Profile of the Farmers Under Mission Kakatiya Programme in Telangana State 44 K. ARUNA, V. SUDHA RANI, I. SREENIVASA RAO,, G.E.CH.VIDYASAGAR and D. SRINIVASA CHARY Integrated Farming System – Farmers Perception in Telangana 50 S. KAVITHA, G. SAMUEL, I. SREENIVASA RAO, M. GOVERDHAN and D. SRINIVASA CHARY PART III : RESEARCH NOTES Status and Prospects of Krishi Vigyan Kendra Activities in Southern India 55 N. BHUVANA, I. SREENIVASA RAO, BHARAT S SONTAKKI, G.E. CH. VIDYASAGAR and D. SRINIVASA CHARY Effect of Plant Geometries on Yield and Quality Components of Quinoa Leaves 62 (Chenopodium quinoa) Under Southern Telangana K. ARPITHA REDDY, B. NEERAJA PRABHAKAR and W. JESSIE SUNEETHA Capsicum (Capsicum annuum var. grossum L.) Response to Different N and K Fertigation 65 Levels on Yield, Yield Attributes and Water Productivity Under Polyhouse B. GOUTHAMI, M. UMA DEVI, K. AVIL KUMAR and V. RAMULU Diversity and Abundance of Insect and Spider Fauna in Sole and Soybean Intercropped Cotton 71 K.R. MAHENDRA, G. ANITHA, C. SHANKER and BHARATI BHAT Effect of Different Levels of Drip Irrigation Regimes and Fertigation on Yield and Yield 75 Attributes of Rabi Sunflower (Helianthus annuus. L) A. SAIRAM, K. AVIL KUMAR, G. SURESH and K. CHAITANYA Economics of Organic and Conventional Paddy Farming in Mahbubnagar District of Telangana 79 R. SUKESH, T. LAVANYA, R. VIJAYA KUMARI and D. SRINIVASA CHARY Survey for Fusarium Wilt Incidence of Tomato in Major Crop Growing Areas of Telangana State 83 CH. S. KISHORE KUMAR, BHARATHI N BHAT, R. JAGADEESHWAR, CH.V. DURGA RANI and G. ANITHA KUMARI Correlation and Path analysis in Rice (Oryza sativa l.) for Grain yield and its components 88 T. SOUJANYA , V. HEMALATHA, P. REVATHI, M. SRINIVAS PRASAD and K. N. YAMINI Analysis of resistance to yellow mosaic virus in green gram (Vigna radiata (l.) wilczek) 93 MOHD ABDUS SUBHAN SALMAN , CH. ANURADHA ,V. SRIDHAR and SNCVL. PUSHPAVALLI Research Article The J. Res. PJTSAU 48 (3&4) 1-10, 2020 COMBINING ABILITY AND HETEROSIS OVER LOCATIONS FOR YIELD AND YIELD COMPONENTS IN HYBRID RICE (Oryza sativa L.) T. VIRENDER JEET SINGH, CH. DAMODAR RAJU, Y. CHANDRA MOHAN, R. JAGADEESHWAR, M. BALRAM and L. KRISHNA Department of Genetics and Plant Breeding, College of Agriculture Professor Jayashankar Telangana State Agricultural University, Hyderabad-500 030 Date of Receipt : 24-07-2020 Date of Acceptance : 12-08-2020 ABSTRACT A set of 32 newly developed hybrids along with their parents (B and R lines) and standard checks viz., RNR 15048 and PA 6444 were evaluated for thirteen grain yield and its contributing traits to estimate heterosis and combining ability effects in rice through Line × Tester analysis. The mean performance of hybrids for most of the characters was higher than that of parents except for milling percent. The analysis of variance revealed significant differences among parents, lines and hybrids for most of the characters studied. Degree of dominance was less than unity for days to 50 percent flowering, plant height, panicle length, panicle weight, 1000 grain weight, number of filled grains per panicle and spikelet fertility indicating the existence of partial dominance. SCA variances were higher than GCA variances for most of the characters, which indicated the predominance of non-additive gene action. The gca effects revealed that the line JMS 14B and three testers viz., RNR 26059, RNR 26072 and PAU 2K10-23-451-2- 37-34-0-3 were found to be good general combiners for yield and majority of the yield contributing traits in desirable direction. Of the thirty two hybrids, JMS 14A × RNR 26083, JMS 14A × RNR 26084, CMS 64A × PAU 2K10-23-451-2-37-34-0-3, CMS 23A × RNR 26072 and CMS 64A × RNR 26059 were found good specific combiners. Eight and five hybrids had positive and significant standard heterosis over varietal check (RNR 15048) and hybrid check (PA 6444), respectively. Based on sca and heterosis, hybrids JMS 14A × RNR 26083, JMS 14A × RNR 26059, CMS 64A × PAU 2K10-23-451-2-37-34-0-3, CMS 23A × RNR 26072 and CMS 64A × RNR 26059 were found promising for further exploitation. Rice is one of the foremost cereal crops feeding straight varieties to the tune of 65 to 70 q ha-1 in hybrids. over more than half of world’s population. However, to As a result, farmers could gain more profits and the meet the demand of growing population rice production area under straight varieties is being replaced with need to be stepped up continuously (Kumar et al., hybrids (Yuan et al., 1989) at a faster rate. 2014). It is the only crop in the world that is grown in The first step in generating promising hybrids the most fragile ecosystem and hence, second green is the selection of desirable parents. The contribution revolution is possible only if rice research is undertaken of parents in a cross and combining ability of parents vigorously. This elucidates reorientation of our research in crosses can be assessed by biometrical methods. towards yield improvement. Theoretically, rice crop still Line × Tester analysis devised by Kempthorne (1957) has great yield potential to be tapped and this can be is one of the effective mating designs used to estimate achieved through many approaches including combining ability effects and aids in selection of molecular breeding, new ideotype breeding and hybrid desirable parents and crosses for the exploitation of rice technology. Exploitation of heterosis in rice through heterosis (Sarker et al., 2002). The knowledge of hybrid technology seems to be more effective, as combining ability is useful to elucidate the nature and commercial rice hybrids exhibited 38% more yield magnitude of gene actions involved and provides to superiority compared to the best commercial variety the breeder an insight into the nature and relative magnitude of fixable and non-fixable genetic variances (Singh et al., 2013). i.e. due to dominance or epistatic components (Pratap At present commercial exploitation of heterosis et al., 2013). Hence, in the present investigation an in hybrid rice is being explored in many rice growing attempt is made to estimate the combining ability and countries. In China hybrid rice technology has magnitude of heterosis for grain yield and important revolutionized the rice farming due to impressive gains yield attributes in 32 rice hybrids developed by using achieved in productivity levels from 35 to 40 q ha-1 in new CMS lines and testers. email:[email protected] 1 VIRENDER JEET SINGH et al. MATERIAL AND METHODS taken in each plot. Per day productivity was calculated by dividing grain yield in hectare with days to maturity. Four stable Wild Abortive cytoplasm based CMS lines (Table 1) and eight restorer lines were utilized The character means of each replication over locations in the present study and crosses were effected was subjected to analysis of variance (Panse and between these CMS lines and restorers in Line x Tester Sukhatme, 1967), combining ability analysis mating design during rabi 2018-19 and obtained 32 (Kempthorne 1957) and heterobeltiosis and standard hybrids. During kharif 2019, a total of 32 hybrids along heterosis (Fonseca and Patterson, 1968). Computer with 8 testers and 4 ‘B’ lines of corresponding male software Windostat version 9.1 was used for analysis sterile lines and 2 checks were evaluated in a single of the data. row of 3 m length with 2 replications in RBD by RESULTS AND DISCUSSION adopting a spacing of 20 × 15 cm at three diverse The pooled analysis of variance over locations locations (representing three agroclimatic zones) viz., Regional Sugarcane & Rice Research Station, Rudrur revealed significant differences among locations, (Northern Telangana Zone), Regional Agricultural genotypes, parents and crosses for all the characters Research Station, Warangal (Central Telangana Zone) studied (Table 2). The variance due to hybrid was and Rice Research Centre, Agriculture Research partitioned into variance due to lines, testers and lines Institute, Rajendranagar, Hyderabad (Southern × testers for all the characters. Variance due to lines Telangana Zone). Recommended agronomic practices was significant for days to 50% flowering and spikelet were followed to raise a healthy crop. fertility, while variance due to testers was significant Table 1. Details of rice parental material used in the study S. No Genotype Source Lines 1. RNR 26059 RRC, ARI, Hyderabad 2. RNR 26072 RRC, ARI, Hyderabad 3. RNR 26074 RRC, ARI, Hyderabad 4. RNR 26083 RRC, ARI, Hyderabad 5. RNR 26084 RRC, ARI, Hyderabad 6. Pusa 1701-10-5-8 IIRR, Hyderabad 7. PAU 2K10-23-451-2-37-34-0-3 IIRR, Hyderabad 8. RP 5898-54-21-9-4-2-2 IIRR, Hyderabad Testers 1. CMS 23B IRRI, Philippines 2.