scholarly journals Morphological and agronomical characterization and estimates of genetic parameters of sesbania Scop. (Leguminosae) accessions

1999 ◽  
Vol 22 (1) ◽  
pp. 81-93 ◽  
Author(s):  
E.A. Veasey ◽  
E.A. Schammass ◽  
R. Vencovsky ◽  
P.S. Martins ◽  
G. Bandel
Keyword(s):  
Genetic Variability ◽  
Genetic Parameters ◽  
Block Design ◽  
Soil Improvement ◽  
Morphological Characters ◽  
Wood Products ◽  
Agronomic Characters ◽  
Legume Plant ◽  
Biomass Yields ◽  
Superior Genotypes

Twenty-two accessions of seven Sesbania (Leguminosae) species: S. emerus, S. rostrata, S. tetraptera, S. exasperata (annuals), S. grandiflora, S. sesban and S. virgata (perennials), used for ruminant fodder, firewood, wood products, soil improvement, and human food, were investigated, with the aim of characterizing both inter- and intraspecific genetic variability, estimating genetic parameters for the characters evaluated and appraising the forage potential of the accessions. These were planted at the Instituto de Zootecnia, Nova Odessa, SP, Brazil, in a randomized complete block design with 22 treatments and four replications. Seventeen morphological and 17 agronomic characters were evaluated. Genetic parameters coefficient of intraspecific genetic diversity (bi) and coefficient of intraspecific genetic variation (CVgi) were obtained for the species represented by more than one accession. Highly significant differences were observed among as well as within species for most characters, showing considerable genetic variability. S. exasperata showed intraspecific genetic variability for the largest number of morphological characters. The same was observed for S. sesban for the agronomic characters. Most of the characters gave high bi values, above 0.80, indicating the possibility of selecting superior genotypes. The CVgi values, on the other hand, which indicate the magnitude of the existing genetic variability relative to the character mean, varied according to the species and character evaluated. Differences between annual and perennial species were observed, with higher biomass yields presented by the annuals at the first cut and by the perennials after the second cut, reaching the highest yield at the third cut. The annual species had higher seed production. Accession NO 934 of S. sesban gave the highest biomass yields and regrowth vigor, showing promise as a forage legume plant.

scholarly journals Characterization of Local Rice, Pegagan (Siputih) on Lowland Swamp Agroecosystems in South Sumatra

2018 ◽  
Vol 24 (2) ◽  
pp. 77
Author(s):  
Kiagus Abdul Kodir ◽  
Yuana Juwita ◽  
Priatna Sasmita
Keyword(s):  
Quantitative Data ◽  
Qualitative Data ◽  
Block Design ◽  
Morphological Characters ◽  
National Commission ◽  
Agronomic Characters ◽  
Plot Size ◽  
Randomized Block Design ◽  
Number Of Seeds

<p>The Pegagan rice (Siputih) is one of local rice lowland specific in South Sumatra. This rice is rarely grown by farmers. Identification was carried out at lowland Agroecosystem in Ogan Komering Ilir Distric of South Sumatra Province. The purpose of this study was to characterize on morphological and agronomic characters. The study was conducted by planting and observing the local rice Pegagan (Siputih) which collected from five different districts (Tanjung Raja, Indralaya, Jejawi, SP Padang, and Kayuagung). All materials were tested using Randomized Block Design Complete with four replications. Each plot size 5 m × 5 m, number of seeds/holes 2–3 rod, a spacing of 25 cm × 25 cm. The characterization was done based on Rice Characterization and Evaluation Guide of the National Commission for Rice Germplasm. Morphological characters were presented in qualitative data and analyzed by Mode (Mo) analysis, while the agronomic characters were showed on quantitative data and analyzed by analysis of variance (ANOVA). The observation and analysis were indicated that the five local rice Pegagan (Siputih) which collected from 5 different district were showed no diversity, both on morphology and agronomic characters. Paralele on characterization planting, roughing was done and detected 0.15% mixed with others varieties and 1.85% plant have the deviation characters.</p>

scholarly journals Genetic Variability, Heritability, and Genotypic Correlation of Soybean Agronomic Characters

2021 ◽  
Vol 19 (2) ◽  
pp. 117
Author(s):  
Heru Kuswantoro ◽  
Moch Muchlish Adie ◽  
Pratanti Haksiwi Putri
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Seed Weight ◽  
Genetic Parameters ◽  
Genotypic Correlation ◽  
Agronomic Characters ◽  
Days To Maturity ◽  
100 Seed Weight ◽  
Number Of Branches

<p>Genetic parameters are important in genetic improvement and variety development. This study aimed to determine the effective characters that can be applied as selection criterion in soybean breeding using genetic parameters. About 100 soybean genotypes were grown in the Muneng Agricultural Technology Research and Assessment Installation from April to July 2020. The trial was conducted using a randomized complete block design. The results showed that high genetic variability was found on days to maturity, number of branches per plant, number of productive nodes per plant, 100-seed weight, and seed yield. The high heritability was shown by days to maturity, plant height, number of branches per plant, and 100-seed weight. All phenotypic correlations were significant, except for the correlation between seed yield and days to maturity, plant height, number of branches, and number of productive nodes. The seed yield had no genotypic correlation with all agronomic characters observed. The genotypic correlation was only significant for plant height and number of productive nodes, number of branches and number of filled pods, as well as number of productive nodes and 100-seed weight. Therefore, the improvement of seed yield can be conducted through direct selection using the seed yield parameter or indirectly using the 100-seed weight.<br /><br /></p>

Analysis of morphological characters inter-relationships in the germplasm of mungbean [Vigna radiate (L.) Wilezek] in the hot arid climate

2016 ◽  
Vol 39 (1) ◽  
Author(s):  
Om Vir ◽  
A. K. Singh
Keyword(s):  
Genetic Variability ◽  
Short Duration ◽  
Seed Yield ◽  
Block Design ◽  
Morphological Characters ◽  
Cluster Number ◽  
Number Of Clusters ◽  
Days To Maturity ◽  
Pod Number ◽  
Number Of Seeds

The 38 indigenous and exotic accessions of mungbean were evaluated in a randomized complete block design with three replicates during <italic>summer</italic> and <italic>kharif</italic> seasons of fragile climate of Rajasthan to estimate the presence of genetic variability, inter-characters associations, to identify a suitable short duration accession for cultivation during <italic>summer</italic> and to compare the relative performance of the genotypes in two seasons. The high degree of genetic variability was estimated during both seasons for seed yield per plant (g), 100-seed weight (g.), number of seeds per pod, number of pods per plant, number of pods per cluster, number of branches per plant, number of clusters per plant, plant height (cm.), number of days to 50% flowering and number of days to maturity. The moderate to high heritabilities coupled with moderate to high expected genetic advance were observed for all studied traits. Number of seeds per pod, number of pods per plant, number of pods per cluster, number of clusters per plant, days to 50% flowering and days to maturity had positive and significant correlations with seed yield per plant. The accession IC 39289-P<sub>4</sub> had been identified to be of short duration of 50 days. The accessions PLG 62, EC 520035, IC 305291, IC 39383, IC 39333, IC 39403 during <italic>summer</italic> season and EC 511379, PLM-14, IC 324021, EC 511371, IC 370497 during <italic>kharif</italic> seasonexhibited superiority in terms of seed yield over best check.

scholarly journals Recurrent selection in inbred popcorn families

2004 ◽  
Vol 61 (6) ◽  
pp. 609-614 ◽  
Author(s):  
Máskio Daros ◽  
Antônio Teixeira do Amaral Jr. ◽  
Messias Gonzaga Pereira ◽  
Fabrício Santana Santos ◽  
Ana Paula Cândido Gabriel ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Recurrent Selection ◽  
Agronomic Traits ◽  
Block Design ◽  
Genotype By Environment Interaction ◽  
Small Scale ◽  
Environment Interaction ◽  
Genotype By Environment ◽  
Randomized Complete Block Design ◽  
Superior Genotypes

Although much appreciated in Brazil, commercial popcorn is currently cropped on a fairly small scale. A number of problems need to be solved to increase production, notably the obtaintion of seeds with good agronomic traits and good culinary characteristics. With the objective of developing superior genotypes in popcorn, a second cycle of intrapopulation recurrent selection based on inbred S1 families was carried out. From the first cycle of selection over the UNB-2U population, 222 S1 families were obtained, which were then divided into six sets and evaluated in a randomized complete block design with two replications within the sets. Experiments were carried out in two Brazilian localities. The analysis of variance revealed environmental effects for all evaluated traits, except popping and stand, showing that, for most traits, these environments affected genotype behavior in different ways. In addition, the set as source of variation was significant for most of the evaluated traits, indicating that dividing the families into sets was an efficient strategy. Genotype-by-environment interaction was detected for most traits, except popping expansion and stand. Differences among genotypes were also detected (1% F-test), making viable the proposition of using the genetic variability in the popcorn population as a basis for future recurrent selection cycles. Superior families were selected using the Smith and Hazel classic index, with predicted genetic gains of 17.8% for popping expansion and 26.95% for yield.

scholarly journals Genetic Variation and Agronomic Characters of Bambara Groundnut (Vigna subterranea L. Verdc.) Lines Results of Pure Line Selection from Sukabumi Lanras

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Yuliawati Yuliawati ◽  
Yudiwanti Wahyu ◽  
Memen Surahman ◽  
Arifah Rahayu
Keyword(s):  
Block Design ◽  
Nutrient Content ◽  
Pure Line ◽  
Bambara Groundnut ◽  
Agronomic Characters ◽  
Plant Materials ◽  
Legume Plant ◽  
Genetical Variation ◽  
Line Selection ◽  
Materials Used

Bambara groundnut is a legume plant that has several advantages, including droughttolerance, has ability to grow on infertile land and high nutrient content. The production ofbambara groundnut is still low, so it is necessary to obtain high yielding bambara groundnut line.The experiment was conducted to evaluate the genetical variation and agronomic characters of 30bambara groundnut lines. This experiment was carried out in experimental field of SEAMEOBIOTROP Tajur Bogor (± 280 m above sea level), on Februari-June 2018. Plant materials used inthis research were 30 bambara groundnut lines derived from pure line selection of Sukabumilandrace and unselected Sukabumi landrace uses as control. The experiment was arranged in arandomized complete block design with three replications. Results showed that there werevariations among several agronomic characters of bambara groundnut lines. Several lines showedsuperior characters. R59.30, A90.8, A41.4, A56.10, A43.5, A103.5, A41.4, A55.8, R59.31 andA28.10 lines were lines with the higest dry pods weight compared to the other lines and controlline. These lines had potential as new superior varieties of bambara groundnut.Keywords: landrace, new superior variety, pure line selection

scholarly journals Morphological characterization and assessment of genetic parameters of NERICA mutant rice lines under rainfed condition

2017 ◽  
Vol 2 (4) ◽  
pp. 532-540
Author(s):  
Md Nuruzzaman ◽  
Lutful Hassan ◽  
Shamsun Nahar Begum ◽  
Md Monjurul Huda
Keyword(s):  
Genetic Parameters ◽  
Block Design ◽  
Maximum Yield ◽  
Morphological Characters ◽  
Morphological Characterization ◽  
Rainfed Condition ◽  
Randomized Complete Block Design ◽  
High Heritability ◽  
Parental Lines ◽  
Mutant Lines

An experiment was conducted to evaluate thirty one NERICA mutant rice genotypes (twenty eight NERICA mutant lines along with three parental lines) of advanced (M4 and M5)generations for morphological characters and genetic parameters assessment in aus season, 2014 at the experimental field of Biotechnology division, BINA, BAU Campus, Mymensingh-2202 following Randomized Complete Block Design (RCBD) with three replications. The genotypes differed significantly for all the traits viz., days to flowering (1st, 50%, 80%), days to maturity, plant height, total tillers and effective tillers hill-1, filled and unfilled grains panicle-1, 100-seed weight (g) and yield plant-1(g).N1/300/P-9-5 had maximum yield plant-1 and N4 parent had minimum yield plant-1. All the parental lines showed less yield compared to other mutant lines. The phenotypic coefficient of variations (PCV) were higher than genotypic co-efficient of variations (GCV) for all the traits studied indicating that they all interacted with the environment to some extent. All the traits studied expressed moderate to high heritability estimates ranging from 43.68 to 92.87%. High heritability along with high genetic advance was noticed for the traits, number of filled grains panicle-1, number of unfilled grains panicle-1 and plant height.Asian J. Med. Biol. Res. December 2016, 2(4): 532-540

Genetic variability and correlation studies in brinjal (Solanum melongena L.)

2017 ◽  
Author(s):  
G. Samlind sujin ◽  
P. Karuppaiah ◽  
K. Saravanan
Keyword(s):  
Genetic Variability ◽  
Block Design ◽  
Genotypic Variation ◽  
Solanum Melongena ◽  
Morphological Characters ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Path Coefficient ◽  
Fruit Borer ◽  
Positive Direct

The present investigation was carried out in the Department of Horticulture, Faculty of Agriculture, Annamalai University, during the period 2014 - 2015 to asses the extent of genetic variability, heritability, correlation and path coefficient analysis of 60 genotypes of brinjal for yield and shoot and fruit borer tolerance. The experiment was laid out in randomized block design with three replications. The maximum phenotypic and genotypic variation was noted for fruit yield per plant followed by fruit weight, fruit girth, number of fruits per plant and shoot and fruit borer incidence. High heritability along with high estimates of GCV, genetic advance and genetic gain were observed for fruit yield per plant, fruit weight, number of secondary branches per plant and shoot and fruit borer incidence. Among the sixteen morphological characters studied, number of long styled flowers per plant, number of short styled flowers per plant, number of fruits per plant, fruit weight, days to first harvesting and shoot and fruit borer incidence showed positive direct effect. For fruit weight, fruit girth and number of fruits per plant were observed positive and significant correlation. It is suggested that the greater emphasis should be given for selection of these characters.

scholarly journals Assessment of genetic variability in different kenaf (Hibiscus cannabinus) germplasm using morpho-agronomic traits

2020 ◽  
pp. 5-12
Author(s):  
Arju Miah ◽  
A. K. M. Shahadat Hossain ◽  
Nihar Ranjan Saha ◽  
Md. S. M. Shahriar Parvej ◽  
Md. Younus Ali ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Agronomic Traits ◽  
Hibiscus Cannabinus ◽  
Agronomic Characters ◽  
Base Diameter ◽  
Effective Utilization ◽  
Varietal Identification ◽  
Superior Genotypes ◽  
Stem Colour ◽  
Better Than

Kenaf (Hibiscus cannabinus L.) is a fiber crop classified in the genus Hibiscus (Malvaceae), and has a great potential for its multipurpose utilization, in addition to its traditional usage. Varietal identification of kenaf is always problematic and knowledge on genetic variability of kenaf varieties is also limited, which significantly hindered our effective utilization and conservation of the valuable kenaf germplasm. In order to find a proper method for identifying kenaf varieties and studying their variation, morpho-agronomic characters were analyzed. Fifty eight accessions of kenaf germplasm collected from Gene Bank Department of Bangladesh Jute Research Institute were characterized at Jute Agriculture Experiment Station, Manikganj during April 2014 to December 2014. The accessions were characterized for fifteen morpho-agronomic attributes as per Hibiscus descriptor in order to select superior genotypes for the genetic improvement of kenaf. Considerable ranges of variability were observed in stem colour, petiole colour, plant height, base diameter, dry fibre weight, dry core weight, green weight with leaves and green weight without leaves. Based on major yield contributing characters accessions 1653, 3384, 3928 and 4202 performed better than the control varieties HC-2 and HC-95.

scholarly journals Estimation of genetic parameters in rubber progenies

2012 ◽  
Vol 12 (3) ◽  
pp. 185-190 ◽  
Author(s):  
Cecília Khusala Verardi ◽  
Marcos Deon Vilela de Resende ◽  
Reginaldo Brito da Costa ◽  
Paulo de Souza Gonçalves
Keyword(s):  
Genetic Variability ◽  
Genetic Parameters ◽  
Block Design ◽  
Rubber Tree ◽  
Selection Procedure ◽  
Randomized Block Design ◽  
Secondary Traits ◽  
Selection For ◽  
The Individual ◽  
Progeny Performance

This study was designed to evaluate the genetic variability, the potential for rubber yield and secondary traits of rubber tree progenies at three locations in the state of Sao Paulo. The experiments were conducted in a randomized block design with 22 progenies and 6 replications. At the age of three years, the progenies were evaluated for rubber yield, girth growth and total number of latex vessel rings. The results showed the existence of genetic variability among progenies for each location separately as well as between locations, with differences in the progeny performance for the traits. The individual heritabilities calculated for rubber yield, girth growth and total number of latex vessel rings (0.30, 0.63 and 0.29, respectively), associated with high genetic gains with selection for the traits studied at each site, showed that the populations can be considered suitable for the rubber breeding program, provided that an appropriate selection procedure is used.

scholarly journals Adaptability and stability of early carioca beans by mixed models

2020 ◽  
Vol 36 ◽  
Author(s):  
Thalyson Vasconcelos Lima ◽  
Paulo Ricardo Dos Santos ◽  
Tâmara Rebecca Albuquerque De Oliveira ◽  
Maxwel Rodrigues Nascimento ◽  
Kleyton Danilo da Silva Costa ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Block Design ◽  
Phenotypic Expression ◽  
Environment Interaction ◽  
Randomized Block Design ◽  
Specific Performance ◽  
Superior Genotypes ◽  
The Mean ◽  
Selection Of

The genotype x environment interaction represents one of the major selection challenges due to the difficulty in identifying effectively superior genotypes. The present study aimed at estimating genetic parameters and selecting genotypes of early Carioca beans by analyzing simultaneous attributes, including yield, adaptability, and stability. In the agricultural year of 2015 and 2016, three trials were conducted, using a randomized block design, with three repetitions each, in the Agreste and Sertao regions of Pernambuco State. The genetic parameters were estimated using the mixed model procedure, and the selection was based on the harmonic mean of the relative performance of genetic values (MHPRVG, abbreviation in Portuguese) method. The environments influenced the phenotypic expression of the bean genotypes during both years, setting a specific adaptation. The mean heritability of the genotypes regarding yield exhibited low magnitude values  in the trials of 2015 (5.78%) and 2016 (13.77%), indicating costly conditions for the selection of the improved genotypes. Genotype CNFC 15856 was selected, considering the genetic gain predicted for yield, by the average and specific performance in the three environments, and by the simultaneous attributes of yield, adaptability, and stability. The MHPRVG method enables the optimized selection of genotypes considering yield, stability, and adaptability; therefore, it should be included in the recommended selective criteria for agronomically superior genotypes in commercial plantations.

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