Yield contributing traits

Time-to-maturation (TTM) is an important trait contributing to adaptability, yield and quality in peanut (Arachis hypogaea L). Virginia market-type peanut belongs to the late-maturing A. hypogaea subspecies with considerable variation in TTM within this market type.

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Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum (Lib.) de Bary, is an important cause of yield loss in soybean. Although many papers have reported different loci contributing to partial resistance, few of these were proved to reproduce the same phenotypic impact in different populations.

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Correlation studies would provide estimates of degree of association between grain yield and its various components and also among the components. While, path co-efficient analysis further elucidates the intrinsic nature of association of component traits by determining direct or indirect contribution of these traits to yield (Baldaniya et al, 2018).

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The generation mean analysis involving six generations (P1, P2, F1, F2, B1 and B2) was carried out to study the nature and magnitude of gene effects for seventeen characters in okra. The study was conducted at Departmental Farm of Department of Agricultural Botany, College of Agriculture, VNMKV Parbhani during Kharif-17 season.

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The present study was carried out to evaluate fifty wheat genotypes of different ecogeographic origin. Data on eight quantitative characters viz., Plant height, reproductive tillers/plant, length of spike, spikelets/spike, days to maturity, grains/spike, test weight and grain yield/plant were recorded.

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Information of general and specific combining abilities influencing yield and its components has become increasingly important to the plant breeders in order to select appropriate parents for developing hybrid cultivars.

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The present study was under taken to unravel the correlation and path co-efficient of yield and yield attributing traits in brinjal.

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These characters may be proved as effective criteria for selection to improve seed yield in pearl millet whereas high heritability values with moderate genetic advance as percentage of mean were observed for days to maturity and protein content.

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The heterosis and combining ability study was conducted in pearl millet involving 60 crosses and 32 parents for 10 quantitative traits to predict the gene action involved in inheritance of yield and yield contributing traits and to identify best general combiners and superior crosses.

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Heterosis phenomenon due to its enhanced expression for the manifestation of different characters in both (positive and negative) direction helps in a crop improvement, therefore heterosis breeding serves as an important tool in tomato (Fageria et al., 2001; Duhan et al., 2005; Thakur et al., 2004).

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Correlation and path analysis was worked out among thirty chickpea genotypes with three replications under both rainfed and irrigated conditions utilising yield, drought tolerant traits and mechanical harvestable traits during rabi, 2018 at Regional Agricultural Research Station, Nandyal, Andhra Pradesh, India. Biological yield per plot and harvest index exhibited significant positive correlation with seed yield and drought tolerance index. 100 seed weight and number of pods per plant also contributed positively to DTI and seed yield under rainfed conditions.

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This information in mind a study was formulated to assess the character association in a set of rice genotypes for the traits contributing to yield under sodic soil condition.

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The experiment was conducted during 2015-2016 at Division of Plant Genetic Resources, Indian Institute of Horticultural Research (IIHR), Hessarghatta, Bengaluru. Genotypic variability, heritability and genetic advance for yield and yield contributing traits were studied on 13 Holostemma ada-kodien accessions. Data were recorded on plant height (m), leaf length (cm), leaf width (cm), petiole length (cm), pedicel length (cm), fruit length (cm), fruit diameter (cm), thickness of pericarp (cm), thickness of mesocarp (cm), number of fruits per plant, fruit yield (kg).

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The present study was conducted with 48 oats genotypes and were grown during Kharif, 2013 to assess the performance, variability, heritability, genetic advance and correlation coefficient analysis using fourteen different yield and yield contributing characters viz.

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Hence, considering the complexity of quantitative inheritance pattern of various characters, the present investigation was formulated with an objective of assessing and quantifying the genetic variability, heritability coupled with genetic advance over percent of mean, correlation coefficient and path coefficient analysis for curd yield and its contributing traits.

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The present investigation was carried out to study the combining ability of varieties/lines for yield and it’s contributing traits and heat tolerance parameters in a line × tester mating design in bread wheat, With the objective of identify the best combining parent and their crosses on the basis of their general and specific combining ability for heat tolerant and grain yield parameters, under normal and late sown environments.

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The research work comprising of genetic variability, heritability and genetic advance as well as correlation and path analysis study for 12 quantitative traits in three genotypes of cotton (Gossypium arboreum L.) was carried out during 2015 and 2016 at Research Farm of Cotton Section, Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar, India. The genotypic differences were significant for all the traits except number of monopods/plant and number of seeds/boll.

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Heterosis manifestation in tomato is in the form of the greater vigour, faster growth and development, earliness in maturity, increased productivity (Yordanov, 1983). So, by exploiting the heterosis for various yield contributing traits and earliness a speedy improvement in tomato can be done.

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A study of correlation and path analysis was undertaken in two F2 populations of Tomato in two promising hybrids Arka Samrat and Arka Rakshak for fruit yield and its component traits. This study helps in identifying the characters which mainly contributing to yield per plant.

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A field experiment was conducted during early Summer, 2017 in Randomized Block Design with three replications at College of Horticulture, SKLTSHU, Telangana. Seven diverse lines of tomato were crossed with three testers in line x tester mating design. The resultant 21 hybrids were evaluated for twenty yield and yield contributing traits in tomato.

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