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Search Results: 1 - 10 of 80 matches for " Chikkalingaiah And Shailaja Hittalmani "
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Correlation study for Protein Content, Grain yield and Yield Contributing Traits in Quality Protein Maize (QPM) (Zea mays L.)
Ravi V. Mural*, Chikkalingaiah And Shailaja Hittalmani
Electronic Journal of Plant Breeding , 2012,
Abstract: Seventy Quality Protein Maize (QPM) (Zea mays L.) hybrids were grown in duplicate randomized complete block design forcharacter association study to assess the relationship among total grain protein content, grain yield and its components. Totalgrain protein showed significant correlation with plant height and ear height. Character association analysis revealed strongpositive association of Grain yield per plant with plant height, ear height, ear length, ear diameter, kernel rows per cob, kernelsper row, test weight and shelling per cent. Total grain protein showed strong negative association with days to 50 % flowering,days to anthesis and days to 50% silking. Hence, simultaneous selection of plant height and ear height would contribute for theimprovement of the grain yield per plant and total protein content in the grains at the same time.
Response of rice (Oryza sativa L.) genotypes under aerobic conditions
Keshava Murthy B. C, Arvind Kumar and Shailaja Hittalmani
Electronic Journal of Plant Breeding , 2011,
Abstract: A field experiment was conducted during wet season 2009 to study the response of rice genotypes under aerobic conditions.Variance studies revealed significant differences among the genotypes for the traits, days to flowering, plant height, harvestindex, grain yield, panicle number, straw yield, panicle length, test weight and biomass. Higher values of heritability and geneticadvance were observed for plant height and days to flowering. Grain yield per plot showed positive association with harvestindex and total biomass. Correlation and path analysis revealed an ideal plant type of genotype under aerobic conditions shouldhave high harvest index and biomass. Eight rice genotypes with increased yield advantage over checks have been identified assuitable entries for aerobic cultivation. Results also suggested that all rice genotypes are not suitable for aerobic method ofcultivation and the genotypes which are able to acclimatize to the non-puddled aerobic conditions should be identified andreleased.
Genetic variability and correlation studies in selected mulberry (Morus spp.) germplasm accessions
B. C. Keshava Murthy, Puttaraju H. P and Shailaja Hittalmani
Electronic Journal of Plant Breeding , 2010,
Abstract: Genetic variability analysis and heritability of different yield contributing characters were studied in 26 genotypes ofmulberry. Variance analysis for characters revealed significant differences among the accessions. Phenotypic coefficient ofvariation (PCV %) was found higher than the genotypic coefficient of variation (GCV %) for all the characters studied.High genetic advance coupled with heritability was observed in the characters namely, number of branches per plant, leafyield per plant, leaf-shoot ratio, hundred leaf weight and total shoot length. Significant positive correlations to leafyield/plant were observed for the characters, number of branches/plant (0.835**), longest shoot length (0.823**) and totalshoot length (0.707**). Leaf yield/plant is an important agronomic character induced by many associated traits and hencecharacters like number of branches/plant, longest shoot length and total shoot length should be considered crucial parametersfor selection in mulberry breeding programme.
Pollen fertility Vs Spikelet fertility in F2 of a CMS based hybrids in rice (Oryza sativa L.) under Aerobic condition
N.Naresh Babu,N.Shivakumar and Shailaja Hittalmani
Electronic Journal of Plant Breeding , 2010,
Abstract: Identification of maintainer and restorers from rice germplasm through test crossing is the initial step in three line heterosisbreeding. Maintainer lines can be converted into cytoplasmic male sterile lines to utilize in development of rice hybrids.Restorer lines can be used as males to produce F1 hybrids. Three hundred F2 plants of the cross KCMS 26A X IET 19886were grown under aerobic situation and fifty randomly selected plants were analyzed for per cent pollen fertility (using oneper cent I-KI solution) and per cent spikelet fertility. Based on the per cent pollen fertility (PF %) the individual plants weregrouped as effective restorer (>96% PF), partial restorer (21-95% PF), partial maintainer (6-20% PF) and maintainer(<5%PF) lines. Based on spikelet fertility (SF %) individual plants were grouped as effective restorer (>80% SF), partialrestorer (21-79% SF), partial maintainer (1-20% SF) and maintainer (<1%SF). There was strong evidence for relationshipbetween pollen fertility and spikelet fertility. Potential restorer is one, that would produce high per cent of seed set in F1while, a potential maintainer would produce 100 per cent sterile pollen in F1. The results in the current study with F2progenies of a cross involving male sterile line indicated that spikelet fertility and pollen fertility are the potential traits inidentification of restorer and maintainer lines, respectively.
Effect of drought on yield potential and drought susceptibility index of promising aerobic rice (Oryza sativa L.) genotypes
Naresh Babu, N., Shailaja Hittalmani, Shivakumar N., Nandini C.
Electronic Journal of Plant Breeding , 2011,
Abstract: Selection of drought tolerance is highly complex and involves evaluating genotypes either for high yield potential or stable performance under varying degrees of water stress. Seventeen advanced rice genotypes were evaluated under aerobic and water stress condition at Department of Genetic and Plant Breeding, GKVK, UAS, Bangalore during summer 2010. Water stress was imposed at late vegetative stage by withholding irrigation supply in one experiment for 15 days and other was maintained as aerobic control. Drought susceptibility index (DSI) and Relative yield (RY) values were used to describe yield stability and relative yield among genotypes. In the present study, there were high variations in drought susceptibility index and relative yield among genotypes. DSI values ranged from -9.37 (25P25) to 18.48 (IR 68897B) and mean RY values were 0.707 and 0.752 for Aerobic condition and water stress respectively. Higher relative yield under water stress indicated the positive response of genotypes to drought. The varieties MAS26, SEL 128, 25P25, PHB 71, MAS25, IR 58025B and MAS946-1 showed high yield potential and yield stability (i. e., DSI < 1 and RY > mean RY). MAS26 and SEL 128 not only have yield stability but they also have high per day productivity per drop of water. So these varieties could be further tested for drought confirming characters and could be used as donor parents in drought tolerance breeding in rice.
DNA marker-assisted evaluation of cultivated and local mulberry genotypes of southern India
Keshava Murthy Bengaluru Channappa,Bandekodigenahalli Marappa Prakash,Shailaja Hittalmani,Hosagavi Puttegowda Puttaraju
Crop Breeding and Applied Biotechnology , 2009,
Abstract: Germplasm evaluation is essential in any crop improvement program and genetic characterization atmorphological and molecular level is very vital for breeding programs to be successful. Twenty six cultivated and localgenotypes of mulberry were subjected to diversity analysis with RAPD markers. Among the total 31 RAPD primers studied, 24were polymorphic and 7 were monomorphic. Of the total 197 loci obtained from 24 polymorphic primers, 110 loci (55.83%)were polymorphic and 87 (44.16%) were monomorphic. A clear grouping was seen among the cultivated genotypes based onyield with varieties like S36, V1, S54 and M5 showing proximity to each other and sharing a close similarity. Local genotypesare rich reservoirs of resistant gene sources and are well acclimatized to the prevailing environmental conditions.Utilizationof these along with other high yielding varieties will produce various combinations of resistance sources which can beincorporated into high yielding varieties.
Exploratory Studies on Genetic Variability and Genetic Control for Protein and Micronutrient Content in F4 and F5 Generation of Rice (Oryza sativa L.)
N.R. Ashwini Samak,Shailaja Hittalmani,N. Shashidhar,Hanumareddy Biradar
Asian Journal of Plant Sciences , 2011,
Abstract: Estimates of variability and presence of genetic interaction of protein and micronutrient (Iron, Copper, manganese, Zinc) characters were analyzed in segregating generations derived from a cross between BPTxHPR 14 of rice. Total Grain Protein Content (GPC) showed high heritability coupled with a moderate genetic advance in both generations. From F4 to F5, heritability estimates showed consistency indicating fixation of loci controlling protein content. According to estimated coefficients of skewness and Kurtosis indicated the presence of duplicate gene interactions in the expression of total grain protein content, copper and iron content whereas complementary gene interaction appears to be absent in the expression of zinc and manganese content. The results indicate the mild selection can be employed for traits like protein content, copper and iron content in segregating generation. The method of using skewness and kurtosis for detecting additive epistasis is very simple and can be used for crop improvement.
Inter-relationship between sugar yield and its component characters in two segregating populations of Sweet sorghum [Sorghum bicolor (L.) Moench.]
R. G. Sandeep, M. R. Gururaja Rao, B. Venkatesh Bhat, S. S. Rao, R. S. Kulkarni , Shailaja Hittalmani and C. A. Srinivasa Murthy
Electronic Journal of Plant Breeding , 2011,
Abstract: An investigation was carried out at Directorate of Sorghum Research, Hyderabad during 2007-2009 to study the interrelationshipof sugar yield and its attributing traits in F2 population of two crosses of sweet sorghum viz., ’27 B × BJ 248’ and‘CSV 17 × BJ 248’. Correlation studies in F2 generation in both the crosses revealed high significant positive correlation of stalkyield, Brix, juice volume, juice yield, juice extraction per cent and total soluble sugar with sugar yield in the crosses. Pathanalysis indicated maximum positive direct effect of stalk yield, juice yield and Brix on sugar yield. Further, the other traits alsoexhibited high positive indirect effect via stalk yield, juice yield and Brix on sugar yield.
MDS and Trilateration Based Localization in Wireless Sensor Network  [PDF]
Shailaja Patil, Mukesh Zaveri
Wireless Sensor Network (WSN) , 2011, DOI: 10.4236/wsn.2011.36023
Abstract: Localization of sensor nodes is crucial in Wireless Sensor Network because of applications like surveillance, tracking, navigation etc. Various optimization techniques for localization have been proposed in literature by different researchers. In this paper, we propose a two phase hybrid approach for localization using Multidi- mensional Scaling and trilateration, namely, MDS with refinement using trilateration. Trilateration refines the estimated locations obtained by the MDS algorithm and hence acts as a post optimizer which improves the accuracy of the estimated positions of sensor nodes. Through extensive simulations, we have shown that the proposed algorithm is more robust to noise than previous approaches and provides higher accuracy for estimating the positions of sensor nodes.
Letters to the Editor. A study of deliberate self-harm patients attending
Shailaja Patil
Australasian Medical Journal , 2011,
Abstract: .
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