Simultaneous Selection of Sweet-Waxy Corn Ideotypes Appealing to Hybrid Seed Producers, Growers, and Consumers in Thailand

Multi-trait selection helps breeders identify genotypes that appeal to divergent groups of preferences. In this study, we performed simultaneous selection of sweet-waxy corn hybrids on several traits covering the perspectives of consumers (taller kernel depth, better eating quality), growers (early maturity, shorter plant stature, and high ear yield), and seed producers (high flowering synchrony, acceptable seed yield, and good plant architecture). Three supersweet corn lines and 8 waxy corn lines were intercrossed to generate 48 F1 hybrids according to North Carolina Design II, and these genotypes were laid out in a randomized complete block design with 3 replications across 2 seasons between 2017 and 2018. A sensory blind test on sweetness, stickiness, tenderness, and overall liking was conducted to assess the eating quality of steamed corn samples. Two methods of simultaneous selection, namely unweighted selection index and overall rank-sum index (ORSI), were applied to rank crosses, following all targeted groups of preferences. Genetic parameters and genetic gain were estimated to evaluate the effectiveness of those selection methods. Both approaches had similar patterns of preferable realized gain on each given trait and could identify similar top five crosses with only slight order changes, implying that these methods were effective to rank genotypes according to given selection criteria. One of the tested crosses, 101L/TSC-10 × KV/mon, consistently had the highest unweighted selection index in the dry (7.84) and the rainy (7.15) seasons and the lowest ORSI (310), becoming a promising candidate as synergistic sweet-waxy corn hybrid appealing to consumers, growers, and seed producers. The expected ideotypes of sweet-waxy corn hybrid are discussed.

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Selection of F6 soybean population for pod shattering resistance

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d201129 ◽

2019 ◽

Vol 20 (11) ◽

Cited By ~ 1

Author(s):

Ayda Krisnawati ◽

ANDY SOEGIANTO ◽

BUDI WALUYO ◽

KUSWANTO

Keyword(s):

Block Design ◽

Selected Lines ◽

Early Maturity ◽

Pod Shattering ◽

Randomized Block Design ◽

Resistant Lines ◽

Simultaneous Selection ◽

Materials Used ◽

Moderately Resistant ◽

Selection Of

Abstract. Krisnawati A, Soegianto A, Waluyo B, Kuswanto. 2019. Selection of F6 soybean population for pod shattering resistance. Biodiversitas 20: 3340-3346. Pod shattering is one of the major soybean constraints in Indonesia. This research aimed to evaluate the resistance of soybean F6 population to pod shattering and characterize the selected lines for their agronomic performances. The materials used were 147 F6 lines derived from six crossing combinations. The check varieties consisted of Dega 1, Detap 1, and Anjasmoro. The experiment was arranged in a randomized block design with two replications. At R8 stage, thirty pods were randomly detached from five sample plants of each line to be used for evaluation of pod shattering resistance using an oven-dry method. The variability of pod shattering was showed after the treatment of 60°C oven temperature. The shattering resistance of 147 F6 lines was classified into 52 highly resistant, 49 resistant, two moderately resistant, ten susceptible, and 34 highly susceptible lines. The pod-shattering resistant lines could be used for further improvement in the breeding program. Anjasmoro variety was effective to be used as gene source for shattering resistant. Simultaneous selection based on yield (30% selection intensity) and shattering resistance selected six lines which have early maturity and large seed size, hence they could be further evaluated in several locations in the next breeding stage.

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Analysis of Direct and Indirect Selection and Indices in Bread Wheat (Triticum aestivum L.) Segregating Progeny

International Journal of Agronomy ◽

10.1155/2018/8312857 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 6

Author(s):

Zine El Abidine Fellahi ◽

Abderrahmane Hannachi ◽

Hamenna Bouzerzour

Keyword(s):

Bread Wheat ◽

Yield Components ◽

Selection Criteria ◽

Flag Leaf ◽

Selection Index ◽

Triticum Aestivum L ◽

Indirect Selection ◽

Selection Methods ◽

Simultaneous Selection ◽

Selection Of

Three selection methods including direct and indirect selection along with selection index based on the phenotypic values of eleven traits of agronomic interest were assessed for their application in F4 bread wheat progenies. Significant genetic variation existed among parents and crosses for the traits measured. The following were the most efficient indices for simultaneous selection of superior lines for yield and its components: base index of Williams, followed by the sum of ranks index of Smith and Hazel. The selection-based index provided the highest grain yield gains as compared to the other selection criteria, except for flag leaf area, indicating that the direct and indirect monotrait selection were not appropriate in the situation analyzed in this work. PCA identified Ain Abid × Mahon-Demias, Ain Abid × Rmada, and Ain Abid × El-Wifak as the most promising populations. At 5% selection intensity, the top 30 lines selected were distinguished, in comparison with the standard check Hidhab, by significant improvements in yield and yield components.

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Agronomic and yield selection of doubled haploid lines of rainfed lowland rice in advanced yield trials

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d220754 ◽

2021 ◽

Vol 22 (7) ◽

Author(s):

Miftahur Rizqi Akbar ◽

Bambang Sapta Purwoko ◽

ISWARI SARASWATI DEWI ◽

WILLY BAYUARDI SUWARNO ◽

SUGIYANTA SUGIYANTA ◽

...

Keyword(s):

Doubled Haploid ◽

Selection Process ◽

Block Design ◽

Selection Index ◽

Lowland Rice ◽

Agronomic Characters ◽

Doubled Haploid Lines ◽

Rainfed Lowland ◽

Yield Trials ◽

Selection Of

Abstract. Akbar MR, Purwoko BS, Dewi IS, Suwarno WB, Sugiyanta, Anshori MF. 2021. Agronomic and yield selection of doubled haploid lines of rainfed lowland rice in advanced yield trials. Biodiversitas 22: 3006-3012. Selection process is important step to obtain high yielding variety. This study aimed to obtain information on agronomic performance of doubled haploid lines of rainfed rice in advanced yield trials and select the best lines for multi-location yield trials. Two experiments were conducted in Bogor and Subang using a randomized complete block design for each location and consisted of 35 doubled haploid lines and two check varieties namely Ciherang and Inpari 18 as a treatment. The result revealed that interaction between genotype and environment (G x E) significantly affected all agronomic characters, except on the panicle length. Characters with high heritability value were all agronomic characters except number of productive tillers and productivity. Genotypic correlation analysis showed that number of productive tillers and weight of 1000 grains had significant and positive correlation with productivity. The selection used weighted selection index based on multivariate analysis. Fourteen lines were selected for multi-location yield trials. These lines had characteristics as follows: number of productive tillers (14.0-17.7 tillers), weight of 1000 grains (24.7-32.5 g), and productivity (5.0-6.2 ton ha-1). The selected lines can be evaluated further to obtain superior lines in multi-location trials.

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Agronomic potential of BC1F2 dwarf round tomato populations

Ciência e Agrotecnologia ◽

10.1590/1413-7054202044028819 ◽

2020 ◽

Vol 44 ◽

Author(s):

Rafael Resende Finzi ◽

Gabriel Mascarenhas Maciel ◽

Hugo Gabriel Peres ◽

Marina Freitas e Silva ◽

Joicy Vitória Miranda Peixoto ◽

...

Keyword(s):

Block Design ◽

Selection Index ◽

Genetic Material ◽

Fruit Shape ◽

Economic Benefits ◽

Fruit Weight ◽

Soluble Solids ◽

Transverse Diameter ◽

Agronomic Potential ◽

Selection Of

ABSTRACT The use of dwarf lines to obtain mini-tomato hybrids has provided agronomic and economic benefits. In Brazil, round tomatoes predominate over other varieties. The benefits of using a dwarf parent in round tomato hybrids has yet to be explored, making it important to develop dwarf round tomato lines. Backcrossing is the most suitable method to develop these lines. Evaluation and selection of the dwarf populations can improve the development of such lines. Thus, the aim of this study was to select BC1F2 populations of dwarf round tomatoes with agronomic potential and high-quality fruit. The study was conducted at the Vegetable Experimental Station of the Federal University of Uberlândia (UFU). A randomized block design was used, with 15 treatments and three replicates. The genetic material analyzed consisted of 12 BC1F2 dwarf tomato populations, plus both parents (recurrent and donor) and a commercial hybrid. The characteristics assessed were: average fruit weight (g), total soluble solids (ºBrix), number of locules (locules per fruit-1), fruit shape, pulp thickness (cm), longitudinal (cm) and transverse fruit diameter (cm), internode length (cm) and plant height (cm). The data were submitted to mean testing, multivariate analyses and a selection index. In general, average fruit weight in the dwarf populations increased significantly after the first backcross, with some fruits exhibiting a similar shape to round tomatoes. Selection of the populations UFU-DTOM7, UFU-DTOM10, UFU-DTOM5, UFU-DTOM9, and UFU-DTOM3 resulted in an estimated 6% increase in the number of locules, transverse diameter, TD/LD ratio and average fruit weight. The BC1F2 dwarf populations UFU-DTOM7 and UFU-DTOM10 were the most promising for develop inbred lines with round fruits. Despite the considerable progress achieved in this study, we suggest a second backcross, in order to obtain lines and, posteriorly, hybrids with round fruits and compact plants.

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Prediction of genetic gain from selection indices for disease resistance in papaya hybrids

Revista CERES ◽

10.1590/s0034-737x2012000600007 ◽

2012 ◽

Vol 59 (6) ◽

pp. 781-786 ◽

Cited By ~ 7

Author(s):

Marcelo Vivas ◽

Silvaldo Felipe da Silveira ◽

Messias Gonzaga Pereira

Keyword(s):

Powdery Mildew ◽

Block Design ◽

Black Spot ◽

Efficient Procedure ◽

Favorable Alleles ◽

Randomized Block Design ◽

Economic Weight ◽

Selection Indices ◽

Simultaneous Selection ◽

Selection Of

In order to select superior hybrids for the concentration of favorable alleles for resistance to papaya black spot, powdery mildew and phoma spot, 67 hybrids were evaluated in two seasons, in 2007, in a randomized block design with two replications. Genetic gains were estimated from the selection indices of Smith & Hazel, Pesek & Baker, Williams, Mulamba & Mock, with selection intensity of 22.39%, corresponding to 15 hybrids. The index of Mulamba & Mock showed gains more suitable for the five traits assessed when it was used the criterion of economic weight tentatively assigned. Together, severity of black spot on leaves and on fruits, characteristics considered most relevant to the selection of resistant materials, expressed percentage gain of -44.15%. In addition, there were gains for other characteristics, with negative predicted selective percentage gain. The results showed that the index of Mulamba & Mock is the most efficient procedure for simultaneous selection of papaya hybrid resistant to black spot, powdery mildew and phoma spot.

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Breeding full-sib families of sugar cane using selection index

Ciência Rural ◽

10.1590/s0103-84782014000400005 ◽

2014 ◽

Vol 44 (4) ◽

pp. 605-611 ◽

Cited By ~ 7

Author(s):

Livia Marcon Almeida ◽

Alexandre Pio Viana ◽

Antônio Teixeira do Amaral Júnior ◽

Josil de Barros Carneiro Júnior

Keyword(s):

Sugar Cane ◽

Block Design ◽

Selection Index ◽

Breeding Program ◽

Growing Seasons ◽

Randomized Block Design ◽

Sib Families ◽

Number Of Stems ◽

Selection Stage ◽

Selection Of

An experiment with families belonging to the first selection stage (T1) of the Sugar Cane Breeding Program (PMGCA) of the Universidade Federal Rural do Rio de Janeiro (UFRRJ)/RIDESA was carried out in the Plant Disa, located in the municipality of Conceição da Barra-ES, in 2006, aiming to evaluate families, for the selection of superior plants for the later stages of the breeding program of the culture. Sixty-eight full-sib families and three genotypes considered standards with potential recommendation for the area under study were evaluated. The experiment was arranged in a statistical randomized block design, in which the families were grouped into four sets. Each set had four replicates and one hundred seedlings per plot, with spacing of 0.5 meters between plants and 1.40 between rows. The evaluations were conducted during two growing seasons, corresponding to the first and second ratoon, 2008 and 2009, respectively. The traits stem diameter (DMC), total weight of the plot (P), number of stems (NC) Brix of the lower stem (Brix PE) and Brix of the upper stem (Brix PT) were assessed. All traits were significant for the genotypes, by the F test (P<0.01), in joint analyses of environments, which reveals significant differences between families. The values found in this study for the genetic variation coefficient (CVg) indicate great potential for success in breeding programs targeting at the selection of the traits evaluated. The highest gains were achieved when the indices of Smith and Hazel and Mulamba and Mock were used, which allowed simultaneous superior gains in all traits for the best families.

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Selection indices using plant type characteristics in Navy beans (Phaseolus vulgaris L.)

The Journal of Agricultural Science ◽

10.1017/s0021859600028264 ◽

1977 ◽

Vol 89 (2) ◽

pp. 341-348 ◽

Cited By ~ 4

Author(s):

J. H. C. Davis ◽

Alice M. Evans

Keyword(s):

Yield Components ◽

Selection Index ◽

Yield Component ◽

Plant Type ◽

Seed Shape ◽

Navy Bean ◽

Early Maturity ◽

Strong Base ◽

Simultaneous Selection ◽

Efficiency Of Selection

SummaryA replicated trial of 18 families of Navy-bean breeding lines in the F4 generation was grown at Cambridge. The selection-index technique was used to investigate means of improving the efficiency of simultaneous selection for four criteria, namely yield, seed shape (numerical scores from ‘good’ to ‘poor’), early maturity and increased height of pod tips. Relative economic weights were chosen. The yield components and a range of characters describing plant type were measured making 15 characters in all, and combinations of these were included in 32 indices.It was predicted that simultaneous selection would be limited by adverse correlations between some of the four selection criteria, especially early maturity and height. The estimated efficiency of selection would hardly be improved by including information on the yield components. Combinations of the plant type characters, on the other hand, were predicted to provide considerable additional advance amounting to a 10% improvement when information on total number of nodes and inflorescences and hypocotyl diameter was included.It was concluded that the time involved in collecting yield component data would be better spent collecting information on a limited number of plant type characteristics in future trials, and that an ideal plant was one with reduced branching and a few heavily podded inflorescences borne on a tall plant with a strong base.

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USE OF HETEROSIS IN THE SELECTION OF TOMATO ON SPEED

VEGETABLE CROPS OF RUSSIA ◽

10.18619/2072-9146-2018-4-36-38 ◽

2018 ◽

pp. 36-38

Author(s):

N. J. Nurmatov ◽

E. A. Jumayev

Keyword(s):

Total Yield ◽

Potato Research ◽

F1 Hybrids ◽

Maturation Period ◽

Early Maturity ◽

Important Indicator ◽

Experimental Station ◽

High Effect ◽

Economically Valuable Traits ◽

Selection Of

The research was carried out at the Surkhandarya Scientific Experimental Station of the Vegetable-Melon Plant and Potato Research Institute in 2013-2015.mThe aim of the research was to evaluate F1 hybrids and their parental forms by early maturity and to identify the most promising combinations in the conditions of southern Uzbekistan. The studies are devoted to the selection of the parental forms of tomato of different maturation period and the creation on their basis of F1 tomato hybrids and their evaluation on a set of economically valuable traits, primarily on early maturity. The total yield was highest for Dar Zavolzhye, Chelnok, Persey, Utro-2, Slava Moldova, Gruntoviy Gribovskiy 1180, Lyana (51.4-64.4 t/ha) and F1 hybrids: Ion-N x Persey, Novichok x Persey, Dar Zavolzhye x Slava Moldovy, VIR-100 x Perseus, Gruntoviy Gribovsky 1180 x Liyana, Lyana x Persey, Novichok x Slava Moldova, (76,2-90,8 t/ha). High early yield properties are distinguished in the samples of Ion-N, Lyana, Gruntovy Gribovsky 1180, Utro -2, VIR-100, Dar Zavolzhye (21.7-30.5 t/ha) and hybrid combinations Ion-N x Persey, Novichok x Persey, VIR-100 x Persey, Dar Zavolzhye x Slava Moldovy, Gruntoviy Gribovsky 1180 x Lyana, Lyana x Ion-N, the productivity of which for the first three harvest is 25.8-34.2 t/ha. The high effect of heterosis on the overall yield was noted in combinations of Novichok x Persey, Ion-N x Persey, VIR-100 x Persey, Argo x Slava Moldovy, Lyana x Persey, Dar Zavolzhye x Slava Moldovy, Novichok x Slava Moldovy. The above hybrids exceeded the most productive parent by 21.6-33.6 t / ha. The effect of heterosis was 39.6-64.0%. A high effect of heterosis (from 107.5 to 161.2%) on early yield was noted in combinations of Novichok x Persey, Ion-N x Persey, Dar Zavolzhye x Slava Moldovy, Dar Zavolzhye x Novichok, Lyana x Ion-N. Ion-N, VIR-100, Argo, Lyana, and the Slava Moldovy are distinguished according to this important indicator of the maturity of ripening. Only three combinations of Ion-H x Persey, Ion-N x VIR-100, Lyana x IonN, with the maturity of fruit ripening 43-54%.

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Penentuan Indeks Seleksi untuk Galur Dihaploid Padi Sawah Tadah Hujan Berdaya Hasil Tinggi

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) ◽

10.24831/jai.v47i2.25032 ◽

2019 ◽

Vol 47 (2) ◽

pp. 111-118

Author(s):

Miftahur Rizqi Akbar ◽

Bambang Sapta Purwoko ◽

Iswari Saraswati Dewi ◽

Willy Bayuardi Suwarno ◽

Dan Sugiyanta

Keyword(s):

Doubled Haploid ◽

Block Design ◽

Selection Index ◽

Culture Technique ◽

High Yield ◽

High Productivity ◽

Index Model ◽

Rainfed Rice ◽

Selection Of

Rainfed rice breeding for high yield is an alternative to increase national rice production. The breeding can beaccelerated using anther culture technique. The selection of high productivity lines may be more effective if it also involvesthe traits contributing to or affecting the yield traits. This study aimed at determining suitable characters as selection criteriaand obtain a selection index model for high yielding doubled haploid rainfed rice lines. The experiment was conductedin a greenhouse of ICABOGRAD, Bogor and Sawah Baru Experimental Station, Bogor Agricultural University using arandomized complete block design (RCBD) with three replications. Thirty doubled haploid lines derived from anther cultureand two check varieties namely Ciherang and Inpari 18 were used. The results showed that plant height (TT), number of filledgrain per panicle (GI), and productivity (PRD) could be used as suitable selection characters. The determination of selectionindex obtained a selection model which was Selection index = 0.48 PRD + 0.31 JGI - 0.31 TT. This model can be used toselect high yielding doubled haploid rainfed rice lines.

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Phenotypic Characterization of Quinoa (Chenopodium quinoa Willd.) for the Selection of Promising Materials for Breeding Programs

Plants ◽

10.3390/plants10071339 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1339

Author(s):

Elsa Helena Manjarres-Hernández ◽

Diana Marcela Arias-Moreno ◽

Ana Cruz Morillo-Coronado ◽

Zaida Zarely Ojeda-Pérez ◽

Agobardo Cárdenas-Chaparro

Keyword(s):

Grain Quality ◽

Block Design ◽

Descriptive Analysis ◽

Selection Index ◽

Chenopodium Quinoa ◽

Morphological Characteristics ◽

Phenotypic Characterization ◽

Breeding Programs ◽

And Cluster Analysis ◽

Selection Of

Quinoa is an ancestral crop in the Andean region, characterized by its adaptability to different agroclimatic conditions, great nutritional value, and broad genetic variability. A preliminary approach for understanding the genetics of quinoa materials entails a morphologic characterization, which can provide the basis for the selection of materials that satisfy the needs of farmers and consumers. Therefore, this study aimed to evaluate the phenotypic characteristics of thirty genetic C. quinoa accessions for the selection of outstanding accessions in terms of yield and grain quality. A randomized complete block design was used, with nine replications for each accession under greenhouse conditions. Nine quantitative and twelve qualitative descriptors were evaluated with descriptive analysis, Spearman correlation variance, and multivariate and cluster analysis. The results showed that the accessions with heights greater than the average (>176.72 cm) and long panicles (>57.94 cm) presented lower yields and smaller seed sizes, thus decreasing the grain quality. The multivariate and cluster analyses established groups of accessions with good yields (>62.02 g of seeds per plant) and stable morphological characteristics. The proposed selection index, based on yield components and morphological descriptors, indicated four accessions as potential parents for quinoa breeding programs in Colombia.

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