scholarly journals Selection of tomato genotypes for drought tolerance and agronomic potential through different selection indexes

2021 ◽  
Vol 39 (1) ◽  
pp. 102-111
Author(s):  
Camila S de Oliveira ◽  
Gabriel M Maciel ◽  
Eusímio F Fraga Júnior ◽  
Joicy Vitória M Peixoto ◽  
Vitor B Assunção ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Water Deficit ◽  
Block Design ◽  
Selection Index ◽  
Control Treatment ◽  
Solanum Pennellii ◽  
Agronomic Potential ◽  
Selection Indexes ◽  
Tomato Genotypes ◽  
Selection Of

ABSTRACT The selection of genotypes with agronomic potential associated with drought tolerance is considered of high complexity. An alternative could be the use of selection indexes that can evaluate multiple characteristics simultaneously. This study aimed to select tomato genotypes with agronomic potential and drought tolerance by selection indexes. The experiment was conducted in a randomized block design with three replications. Ten treatments were evaluated: seven genotypes F2RC3, donor genitor (Solanum pennellii), recurrent genitor (UFU-040), and cv. Santa Clara. The irrigation was suspended until the substrate reached a matric potential of ≤-25 kPa for water stress simulation during the tomato cycle at 45, 60, 80 and 100 days after sowing. The control treatment (donor genitor) and cv. Santa Clara, were resistant and susceptible to water deficit, respectively. The UFU-102-RC3#91335 genotype presented agronomic potential and satisfactory tolerance level to water deficit and presented 58.2% higher production than the recurrent genitor (UFU-040). The genotype-ideotype distance selection index was the most appropriate for the selection of tomato genotypes for agronomic potential allied to drought tolerance.

scholarly journals Agronomic potential of BC1F2 dwarf round tomato populations

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.

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

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.

scholarly journals Cupuaçu tree genotype selection for an agroforestry system environment in the Amazon

2021 ◽  
Vol 56 ◽  
Author(s):  
Rafael Moysés Alves ◽  
Saulo Fabrício da Silva Chaves ◽  
Rodrigo Silva Alves ◽  
Thalita Gomes dos Santos ◽  
Dênmora Gomes de Araújo ◽  
...  
Keyword(s):  
Mixed Model ◽  
Agronomic Traits ◽  
Block Design ◽  
Black Pepper ◽  
Agroforestry System ◽  
Piper Nigrum ◽  
Randomized Complete Block Design ◽  
Agronomic Potential ◽  
Broom Disease ◽  
Selection Of

Abstract: The objective of this work was to select cupuaçu (Theobroma grandiflorum) tree progenies and individuals based on their agronomic traits, and, indirectly, to identify those adapted to an agroforestry system (AFS) environment in the Brazilian Amazon. For this purpose, 25 full-sib progenies were planted and tested in consortium with black pepper (Piper nigrum), banana (Musa spp.), and bacuri (Platonia insignis) trees. The experiment was carried out in a randomized complete block design, with five replicates and three plants per plot, from 2005 to 2019. For the statistical analyses, the phenotypic averages for production and incidence of witches’ broom disease, evaluated during 11 harvests, were used. Superior progenies and individuals were identified using the mixed model methodology (REML/BLUP), which led to the selection of ten plants from five families with superior agronomic traits. Cupuaçu tree progenies 6, 36, 37, 49, and 52 are the ones that best adapt to the environment of a multispecies AFS in the Amazon region because of their agronomic traits under competitive conditions. Ten matrices show agronomic potential and indirect adaptation to the AFS and can be used as clonal cupuaçu cultivars in this environment.

scholarly journals Breeding full-sib families of sugar cane using selection index

2014 ◽  
Vol 44 (4) ◽  
pp. 605-611 ◽  
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.

scholarly journals Assessment of Groundnut Elite Lines under Drought Conditions and Selection of Tolerance Associated Traits

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Achirou Bacharou Falke ◽  
Falalou Hamidou ◽  
Oumarou Halilou ◽  
Abdou Harou
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Root Length ◽  
Root Length Density ◽  
Block Design ◽  
Genotypic Variation ◽  
Water Regimes ◽  
Year Effect ◽  
Fodder Production ◽  
Selection Of

Investigation of groundnut genotypes response to drought stress could contribute to improving drought tolerance and productivity. The objective of this study was to investigate new improved groundnut varieties response to drought stress under controlled conditions to identify tolerant materials and drought tolerance related traits. Thus, three experiments were conducted during off-seasons: two experiments in lysimetric system in 2017 and 2018 and one experiment in pots in 2017, to assess twelve varieties in a randomized complete block design with 2 water regimes and 4 replications. The water regimes were a full irrigation (WW) and an intermittent drought imposed at flowering times (WS). The investigated morphophysiological traits like transpiration, specific leaf area, root dry matter, root length density, and yield components decreased under WS. Significant year effect and genotypic variation were observed on most of investigated traits. Genotypes ICGV 92206 and ICGV 06319 showed low transpiration and revealed high pod yielding and early maturing genotypes under both water regimes, while genotypes ICGV 92035, ICGV 92195, ICGV 02038, ICGV 07211, and ICGV 07210 were drought-sensitive for pods production but produced high haulm under both water regimes. ICGV 92206, ICGV 02005, ICGV 02125, and ICGV 06319 showed higher yielding than 55-437 and Fleur 11. In this study, low total transpiration to control water loss, chlorophyll content, and root length density revealed drought tolerance associated traits for pod production, while TTW, TE, RDW, and RV revealed drought tolerance associated traits for fodder production.

PRODUCTION OF OIL PALM SEX INFLORESCENSE AND ITS RESPONSE ON THE TREATMENT OF PLANT EXOGENOUS HORMONE TREATMENT UNDER DROUGHT CONDITION

2018 ◽  
Vol 25 (1) ◽  
pp. 31-46
Author(s):  
Iman Yani Harahap ◽  
Sumaryanto Sumaryanto ◽  
Taufiq Caesar Hidayat ◽  
Wan Rizki Fauzi ◽  
Yusran Pangaribuan
Keyword(s):  
Water Deficit ◽  
Oil Palm ◽  
Plant Hormone ◽  
Sandy Loam ◽  
Block Design ◽  
Hormone Treatment ◽  
Control Treatment ◽  
Drought Condition ◽  
Drought Period ◽  
Randomized Block Design

To determining effects of drought on the oil palm sex inflorescene and its response on plant hormone treatmet under drought condition. Then it was carried out the serial treatment at indonesian oil palm research institute (IOPRI) field area trial in Pulau Maria, Asahan District, North Sumatra during 4 year (2013 until midle of 2016). These area having flat topography class with sandy loam texture of typic paleudult soil type and suffering frequently of 200- 460 mm water deficit per year. The trial were undertaken on oil palm tenera's type with 8 years old (planted in 2005). The trial including, 4 kind of phytohormone plus the control treatment, which treated on plant with several of dose and frequency. The phytohormone were IAA (auxsin, Indole-3-acetic acid), BAP (citokinin, 6-benzylaminopurine), GA_3 (gibberelline, gibberellic acid), dan ABA (absisic acid). The dose of each of these kind of hormone were 100, 300, dan 500 ppm, with frequenscy application once and twice per year. The trial design following randomized block design with 3 replicated. Individual unit treatment was the indivduplant. The variable that observed were female, male, and aborted inflorescence; number of frond production; and vegetative growth (height of plant and length of rachis frond). Analysis effect the drought on oil palm sex inflorescene were done by correlation analysis between rainfall and water deficit with inflorescene production. The result shown drought period decline of female inflorescense, and increasing male and aborted inflorescense. Auxin (IAA) treatment, induced vegetatif growth, but contrarily, declining female inflorescense production and increasing male and aborted inflorescense. Gibberelline (GA_3) treatment, decreasing commonly female inflorescense production, and increasing male and aborted inflorescense, mainly in the certain peak of drought periods. Citokinin (ABA) and absicic asid (ABA), tend tokeep female inflorescense production in drought condition, in a way reducing number of aborted inflorescense. Citokinin (BAP), was dominantly plant hormone to keep female inflorescense production.

scholarly journals Tropical maize selection indexes genotypes for efficiency in use of nutrients: phosphorus

Revista CERES ◽  
2017 ◽  
Vol 64 (3) ◽  
pp. 266-273 ◽  
Author(s):  
Gabriel Gonçalves dos Reis ◽  
Felipe Bermudez Pereira ◽  
Italo Stefanine Correia Granato ◽  
Júlio César DoVale ◽  
Roberto Fritsche-Neto
Keyword(s):  
Selection Index ◽  
Principal Component ◽  
P Availability ◽  
Tropical Maize ◽  
Maize Cultivars ◽  
Maize Genotypes ◽  
Low Phosphorus ◽  
Use Efficiency ◽  
Selection Indexes ◽  
Selection Of

ABSTRACT Brazil generates an annual demand for more than 2.83 million tons of phosphate fertilizers. Part of this is due to low P use efficiency (PUE) by plants, particularly in current maize cultivars. Thus, the aim of this study was to create indexes that allow accurate selection of maize genotypes with high PUE under conditions of either low or high P availability. The experiment was conducted in a greenhouse (20º45'14"S; 42º52'53"W) at the Universidade Federal de Viçosa in October 2010. We evaluated 39 experimental hybrid combinations and 14 maize inbred lines with divergent PUE under two conditions of P availability. The relative importance of the traits studied was analyzed and estimated by principal component analysis, factor analysis, and establishment of selection indexes. To obtain genotypes responsive to high P availability, the index SIHP (selection index for high phosphorus) = 0.3985 RDM + 0.3099 SDM + 0.5567 RLLAT + 0.2340 PUEb - 0.1139 SRS is recommended. To obtain genotypes tolerant to low P availability, the index SILP (selection index for low phosphorus) = 0.3548 RDM + 0.3996 RLLAT + 0.3344 SDM + 0.0041 SH/RS - 0.1019 SRS is suggested.

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

Agronomy ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 87
Author(s):  
Abil Dermail ◽  
Aphakorn Fuengtee ◽  
Kamol Lertrat ◽  
Willy Bayuardi Suwarno ◽  
Thomas Lübberstedt ◽  
...  
Keyword(s):  
Block Design ◽  
Selection Index ◽  
F1 Hybrids ◽  
Eating Quality ◽  
Blind Test ◽  
Early Maturity ◽  
Simultaneous Selection ◽  
Waxy Corn ◽  
Corn Hybrid ◽  
Selection Of

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.

scholarly journals Comparison of non-parametric indexes to select soybean genotypes obtained by recurrent selection

2019 ◽  
Vol 40 (5) ◽  
pp. 1761
Author(s):  
Gustavo Henrique Freiria ◽  
Luiz Júnior Perini ◽  
Douglas Mariani Zeffa ◽  
Paulo Sérgio Novais ◽  
Wilmar Ferreira Lima ◽  
...  
Keyword(s):  
Recurrent Selection ◽  
Selection Index ◽  
Inbred Lines ◽  
Cultivar Selection ◽  
Days To Maturity ◽  
Soybean Genotypes ◽  
Superior Genotypes ◽  
Selection Indexes ◽  
Coefficient Of Coincidence ◽  
Selection Of

In the final steps of a breeding program, it is necessary to evaluate several traits, which makes it difficult to select the superior genotypes. This study aimed to compare nonlinear indexes in the selection of superior soybean inbred lines obtained by recurrent selection. The experiment was carried out in Londrina, Paraná State, Brazil. During the 2010/11 and 2011/12 seasons, 67 soybean inbred lines and two commercial controls (BMX Potência RR and NK 7059 RR) were evaluated. The experimental design was a randomized complete block with three replicates. The evaluated traits were: days to maturity, agronomic value, lodging, first pod insertion height, and grain yield. A combined analysis of variance for seasons was performed and the sum of ranks index, ideotype distance index, and cultivars selection index were applied. All traits were significant for the genotypic source of variation and showed complex genotype × environment interactions. The selection indexes were consistent with each other. The ideotype and cultivar selection index showed higher concordance on indication of 15 superior inbred lines with a coefficient of coincidence of 80%. The inbred lines SR-03, SR-12, SR-22, SR-41, SR-49, SR-55, SR-61, and SR-62 were indicated for all indexes and are therefore considered superior to other inbred lines.

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

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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