scholarly journals Genetic parameters and selection indexes for biofortified red leaf lettuce

2021 ◽  
Vol 56 ◽  
Author(s):  
Joicy Vitória Miranda Peixoto ◽  
Gabriel Mascarenhas Maciel ◽  
Rafael Resende Finzi ◽  
Lucas Medeiros Pereira ◽  
Ana Carolina Silva Siquieroli ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Block Design ◽  
Carotenoid Content ◽  
Anthocyanin Content ◽  
Plant Analysis ◽  
High Magnitude ◽  
Selection Indices ◽  
Randomized Complete Block Design ◽  
Selection Indexes ◽  
Leaf Lettuce

Abstract: The objective of this work was to determine the genetic parameters and the efficiency of different selection indices for biofortified red leaf lettuce (Lactuca sativa var. crispa) lines with agronomic and nutritional potential. The experiment was carried out in a randomized complete block design with three replicates and 31 crisp-textured and red-tinted leaf lettuce genotypes: the Belíssima cultivar, with a low carotenoid content and rich in anthocyanins; and 30 lines from the cross between the Belíssima and Uberlândia 10000 cultivars, rich in carotenoids and with a low anthocyanin content. The assessed traits were: total green mass (g), stem diameter (cm), leaf count, plant diameter (cm), foliar temperature (°C), soil plant analysis development (SPAD) index, anthocyanin content (mg 100 g-1 sample), and bolting (days after sowing). To estimate selection gains, 12 genotypes were selected through selection indices. The traditional index proposed by Smith & Hazel and the sum of ranks index by Mulamba & Mock provided the highest selection gains in the biofortified lettuce. The coefficient of genotypic determination for leaf count, anthocyanin content, bolting, and SPAD index is of high magnitude.

scholarly journals Genetic gain via REML/BLUP and selection indices in snap bean

2018 ◽  
Vol 36 (2) ◽  
pp. 195-198 ◽  
Author(s):  
Andréa BS Gomes ◽  
Tâmara RA Oliveira ◽  
Derivaldo P Cruz ◽  
Geraldo A Gravina ◽  
Rogério F Daher ◽  
...  
Keyword(s):  
Block Design ◽  
Selected Lines ◽  
Snap Bean ◽  
Grain Productivity ◽  
Selection Indices ◽  
Randomized Complete Block Design ◽  
Selection Indexes ◽  
The One ◽  
Bean Crop ◽  
Number Of Seeds

ABSTRACT The aim of this study was to compare four selection indexes and REML/BLUP methodology in the evaluation of predicted genetic gains of traits of interest in snap bean breeding program. We evaluated 17 selected lines, in a randomized complete block design, with four replicates, in four environments, Bom Jesus de Itapaboana-RJ, in 2011 and 2012 and Cambuci-RJ, in 2011 and 2013. The evaluated traits were pod and grain productivity, number of pods per plant, number of seeds per pod and weight of 100 seeds. For gain prediction, the employed selection indexes were Pesek & Baker, Smith & Hazel, Mulamba & Mock, Williams and REML/BLUP methodology. Among the tested selection indexes, Mulamba & Mock was the one which showed the best gain distribution considering the tested variables, such as the higher coincidence coefficients in comparison to REML/BLUP, resulting in 62% of grain productivity and pod productivity per plant. The REML/BLUP methodology permitted to select lines with high relative performances and obtained simultaneous gains for the evaluated traits, being superior in relation to the tested selection indexes for snap bean crop.

scholarly journals Short communication: Heterosis and combining ability of Nepalese yellow maize (Zea mays L.)

2013 ◽  
Vol 3 ◽  
pp. 172-180 ◽  
Author(s):  
SR Gautam ◽  
BR Ojha ◽  
SK Ghimire ◽  
DB Gurung
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Quantitative Traits ◽  
Short Communication ◽  
Zea Mays L ◽  
Block Design ◽  
Winter Season ◽  
Inbred Lines ◽  
High Magnitude ◽  
Randomized Complete Block Design

Nepalese yellow maize inbred lines were characterized for general combining ability (GCA) and specific combining ability (SCA) of their crosses and parents were identified having high combining ability for determining the heterotic effects on yield and other quantitative traits of hybrids. A line x tester mating design was used for making the crosses in the winter season of 2008 and the hybrids along with their parents and four checks were evaluated in Randomized Complete Block Design (RCBD) with three replications in the spring season of 2009 at the experimental farm of the National Maize Research Program, Chitwan. Significant variations were found among the treatments for grain yield and other traits which indicated presence of high magnitude of genetic variations among tested inbred lines. The cross between RML-32 and RML-17 produced the highest grain yield (15870 kg/ha) among the crosses. Hybrids such as RL-194 x RL-84 (10770 kg/ha), RML-21 x RML-17 (9270 kg/ha), RL-180 x RML-17 (9270 kg/ha) and L-1 x RL-84 (8785 kg/ha) were found superior grain yielder. Thirty-nine hybrids showed positive mid-parent heterosis for grain yield among 40 crosses. The highest positive mid-parent heterosis for grain yield was found 880% in cross between RML-32 and RML-17, followed by RL-98X RML-17 (507%), RL-103 x RML-17 (403%), PUTU-18 x RML- 17 (351%) and RL-180 x RL 84 (316%). Agronomy Journal of Nepal (Agron JN) Vol. 3. 2013, Page 172-180 DOI: http://dx.doi.org/10.3126/ajn.v3i0.9020

scholarly journals Comparison between non-parametric indexes in the selection of biofortified curly lettuce

2020 ◽  
Vol 11 ◽  
pp. e3351
Author(s):  
Joicy Vitória Miranda Peixoto ◽  
Gabriel Mascarenhas Maciel ◽  
Ana Carolina Silva Siquieroli ◽  
Lucas Medeiros Pereira ◽  
José Magno Queiroz Luz ◽  
...  
Keyword(s):  
Agronomic Traits ◽  
Indirect Selection ◽  
Stem Diameter ◽  
Anthocyanin Content ◽  
Grand Rapids ◽  
Commercial Cultivars ◽  
Lettuce Breeding ◽  
Selection Indexes ◽  
Leaf Lettuce ◽  
Selection Of

Selection indexes can be applied to simultaneous analysis of traits, increasing the efficiency of breeding in choosing the genotypes that meet the needs of both the market and the consumer. While it is a technic applied to several cultures, there are few studies about it in lettuce lines. For this reason, the aim of this study was to comparate assess the efficiency of different selection indexes for selecting biofortifiedleaf lettuce lines with good agronomic traits. The experiment was carried out at the Estação Experimental de Hortaliças of Federal University of Uberlândia (UFU), campus Monte Carmelo, in 2018. The experiment was designed in full randomized blocks of 3 repetitions with 25 leaf lettuce genotypes (22 lines from cultivars Pira 72 versus Uberlândia 10000 and 3 commercial cultivars – cv. Grand Rapids, UFU-Biofort and Uberlândia 10000). The lines are part of the UFU biofortified lettuce breeding program and were assessed for the total green mass (g), the stem diameter (cm), commercial leaves count, plant diameter (cm), foliar temperature (°C), SPAD index, anthocyanin content (mg 100g-1 sample), and bolting (days after sowing). To estimate selection gains, 10 genotypes were selected using both direct and indirect selection, as well as the traditional index, the sum of ranks index, Willians base index, and the multiplicative index. Mulamba and Mock sum of ranks index and Subandi multiplicative index provided the biggest total gains for the traits assessed in biofortified leaf lettuce. Both indexes were similar in selecting genotypes.

scholarly journals Selection of corn cultivars for yield, stability, and adaptability in the state of Amazonas, Brazil

2017 ◽  
Vol 52 (6) ◽  
pp. 455-463 ◽  
Author(s):  
Inocencio Junior de Oliveira ◽  
André Luiz Atroch ◽  
Miguel Costa Dias ◽  
Lauro José Guimarães ◽  
Paulo Evaristo de Oliveira Guimarães
Keyword(s):  
Grain Yield ◽  
Genetic Parameters ◽  
Block Design ◽  
The State ◽  
Environment Interaction ◽  
Growing Seasons ◽  
Randomized Complete Block Design ◽  
Selection For ◽  
Genetic Value ◽  
Selection Of

Abstract: The objective of this work was to evaluate corn cultivars grown in the state of Amazonas, Brazil, which simultaneously show high grain yield, adaptability, and stability. The trials were carried out in seven environments in the state of Amazonas, in a randomized complete block design, with two replicates. The grain yield of 30 corn cultivars was evaluated in four growing seasons, from 2011/2012 to 2014/2015. The genetic parameters were estimated by the REML/Blup methodology. The selection for adaptability and stability was based on the predicted genetic value and on the harmonic mean of the relative performance of the genetic values. Despite the existence of genotype x environment interaction, cultivars with high adaptability and stability were identified. Iranduba - lowland, in 2011/2012 and 2014/2015 - and Rio Preto da Eva - upland, in 2012/2013 - stood out as favorable environments, while Iranduba - upland, in 2011/2012 and 2012/2013 - and Manaus - upland, in 2012/2013 and 2013/2014 - were classified as unfavorable environments. The single-cross hybrid BRS 1055 showed productive superiority and high stability in this region. The Sint 10771, Sint 10781, and Sint 10699 synthetic varieties showed high adaptability. BRS Caimbé shows specific adaptability to cropping in upland environments of the state of Amazonas, Brazil.

scholarly journals Selection of potato clones for tuber yield, vine maturity and frying quality

2018 ◽  
Vol 36 (2) ◽  
pp. 276-281 ◽  
Author(s):  
Giovani O Silva ◽  
Arione S Pereira ◽  
Fernanda Q Azevedo ◽  
Agnaldo DF Carvalho ◽  
Jadir B Pinheiro
Keyword(s):  
Specific Gravity ◽  
Tuber Yield ◽  
Production Systems ◽  
Block Design ◽  
Vine Maturity ◽  
Selection Indices ◽  
Randomized Complete Block Design ◽  
Growing Conditions ◽  
Average Tuber Weight ◽  
Selection Of

ABSTRACT Development of Brazilian potato cultivars adapted to different growing conditions, production systems and regions of the country is very important to increase the competitiveness of the national potato chain. In this sense, the objective of this work was to verify the performance of advanced potato clones for tuber yield traits, vine maturity and frying quality. An experiment was carried out in Pelotas-RS in spring, 2014. A set of nine advanced potato clones and two control cultivars were evaluated using a randomized complete block design with four replicates. Plots consisted of single rows of 20 plants spaced at 0.80 m between rows and 0.30 m between plants. The data of each trait were submitted to the deviance analysis, estimated the genetic values and selected the best genotypes using selection indices of the sum of ranks and the lowest distance from the ideotype. Clones F131-08-26 and F183-08-01, and the check ‘Asterix’ were distinguished for yield of marketable tubers. F183-08-01 and the control stood out for specific gravity and average tuber weight. Clone F161-07-02 ranked among the best for specific gravity, frying color and vine maturity. F97-07-04 and F183-08-01 and the check ‘Asterix’ were the best according to the selection indices, however, would result in losses in the frying color and vine maturity traits.

scholarly journals Genetic parameters of resistance to Meloidogyne incognita in melon

2017 ◽  
Vol 47 (5) ◽  
Author(s):  
Willame dos Santos Candido ◽  
Renata Castoldi ◽  
Lucas da Silva Santos ◽  
Dora Enith Tobar-Tosse ◽  
Pedro Luiz Martins Soares ◽  
...  
Keyword(s):  
Meloidogyne Incognita ◽  
Genetic Parameters ◽  
Block Design ◽  
Root Knot Nematode ◽  
Chi Square ◽  
Nematode Reproduction ◽  
Randomized Complete Block Design ◽  
Chi Square Test ◽  
Reproduction Factor ◽  
Six Genes

ABSTRACT: In order to assess the genetic control of resistance in the melon ‘Gaúcho Redondo’ to the root-knot nematode Meloidogyne incognita, an experiment was conducted in a randomized complete block design with three blocks and six treatments using the parental lines ‘Gaúcho Redondo’ (P1 resistant) and JAB 20 (P2 susceptible), as well as F1, F2, and backcross generations (RC1P1 and RC1P2). Seventy days after inoculation, individual plants were evaluated for resistance using the nematode reproduction factor (RF). The hypothesis of monogenic inheritance was rejected by the chi-square test (χ2), and results indicated that resistance is controlled by more than one gene locus, as confirmed by the quantitative analysis that revealed the presence of six genes.

scholarly journals Performance of soybean grown in succession to black oat and wheat

2020 ◽  
Vol 55 ◽  
Author(s):  
Alvadi Antonio Balbinot Junior ◽  
Julio Cezar Franchini dos Santos ◽  
Henrique Debiasi ◽  
Antônio Eduardo Coelho ◽  
Moryb Jorge Lima da Costa Sapucay ◽  
...  
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Dry Matter ◽  
Plant Density ◽  
Block Design ◽  
Agronomic Performance ◽  
Plant Analysis ◽  
Area Index ◽  
Randomized Complete Block Design ◽  
The Impact

Abstract: The objective of this work was to evaluate the influence of isolated or combined roots and straw of black oat and wheat, as previous crops in autumn/winter, on the performance of soybean in succession. The experiment was carried out in the 2017/2018 and 2018/2019 crop seasons in a randomized complete block design, with four replicates. The following seven treatments were applied in the autumn/winter of 2017 and 2018, before soybean planting: fallow; straw of black oat or wheat, distributed on plots kept under fallow during autumn/winter, without roots; plots only with roots of black oat or wheat, without straw; and plots with straw and roots of black oat or wheat. Soybean crop performance was estimated using the following variables: plant density, leaf area index, soil plant analysis development (SPAD) index, shoot dry matter, grain yield, and yield components. In comparison with fallow, the cultivation of black oat or wheat, as previous crops during the autumn/winter, increases soybean grain yield. The impact of the roots of black oat or wheat on soybean yield is similar to that of straw. Soybean agronomic performance is improved in the combined presence of roots and straw of black oat or wheat.

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

scholarly journals Plant stand failures effect in genetic parameters estimation procedure in Eucalyptus sp.

2020 ◽  
Vol 8 (3) ◽  
pp. 264-276
Author(s):  
Yanca Araujo Frias ◽  
Osmar Gabriel Trigo Marques de Oliveira ◽  
João Victor Tino Dellaqua ◽  
Evandro Pereira Prado ◽  
Paulo Renato Matos Lopes ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Block Design ◽  
Estimation Procedure ◽  
Parameters Estimation ◽  
Forest Genetics ◽  
Breast Height ◽  
Randomized Complete Block Design ◽  
Sib Families ◽  
Plant Stand ◽  
Selective Process

The objective of this work was to verify the influence of the percentage of failures in a forest genetics experiment in the estimation of genetic parameters. The study consisted in the evaluation of two experiments of full‑sib families under randomized complete block design with three replicates conducted in the state of Minas Gerais, Brazil. The experiment I was evaluated in January 2002, with approximately 60 months of age. The experiment II was evaluated in January 2003, with 45 months of age. In both experiments, the evaluations consisted of the measurement of the diameter at breast height and plant height. For all the investigated genetic parameters, an increase in the amplitude of the estimates was verified due to the increase in the number of experimental failures. Variances and negative heritabilities were detected, from 35% of failure, indicating that in such cases, this proportion of failure may be problematic to estimate genetic values, to estimate the gain with the selective process and for make decision.

scholarly journals Spad value varies with age and leaf of maize plant and its relationship with grain yield

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Bishnu Prasad Kandel
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Strong Positive Correlation ◽  
Plant Analysis ◽  
Maize Hybrid ◽  
Maize Hybrids ◽  
Spad Value ◽  
Increase With Increase ◽  
Randomized Complete Block Design ◽  
Phase Data

Abstract Objectives A field experiment was conducted to evaluate Soil Plant Analysis Development (SPAD) value in different age and leaf of maize hybrid and correlating with grain yield. Ten maize hybrids were replicated thricely under Randomized Complete Block Design (RCBD) during winter of 2018. SPAD value was measured by SPAD 502 plus meter. At 30 days interval during vegetative stage SPAD measurement were taken from T1 (top most leaf) and T3 (2nd leaf from top leaf) leaves of five randomly selected plants from one plot and they were averaged. For reproductive phase data taken from eo (leaf attached to ear) and e2 (2nd leaf from eo leaf) leaves at 10 days intervals. Same leaves were used for entire data collection. Results Significantly different SPAD value was observed for different age and leaves of maize during pre and post anthesis. SPAD value increase with increase in age and decrease at the time of maturity. During vegetative phase T3 leaves has more SPAD value than T1. During reproductive stage eo leaves had more SPAD than e2 leaves, so center leaf of maize contributes more to grain yield. Correlation showed that there is strong positive correlation between different stage of SPAD with grain yield.

Sign in / Sign up

Export Citation Format

Share Document