Consulta: subjectFacets:"Backcross"
Registros recuperados: 7
Data/hora: 03/06/2024 18:13:42

Marker-assisted backcrossing using microsatellites and validation of SCAR Phs marker for resistance to white mold in common bean
Provedor de dados: 69
Autores: Carneiro,Flávia Fernandes; Santos,João Bosco dos; Leite,Monik Evelin.
Molecular markers may accelerate selection through the identification of plants with higher proportion of recurrent parent genome, as well as identifying those plants bearing target alleles like quantitative traits loci (QTLs) for white mold resistance. The objectives of this work were: 1) to employ microsatellite markers (SSR) in order to accelerate the recovery of recurrent parent genome 2) to validate sequence characterized amplified region (SCAR) Phs associated with a QTL that confers resistance to white mold, as previously identified in bean populations. Lines G122 and M20 were crossed, which generated 267 F1 plants from backcross (BC) BC1 and 113 plants from backcross BC2.SSR polymorphic markers were adopted. The relationship between BC plants and...
Tipo: Journal article
Palavras-chave: Backcross; Genetic similarity; Phaseolus vulgaris; SCAR; Sclerotinia sclerotiorum; SSR assisted selection.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600009

Allele frequency and selection efficiency in cross populations of Andean x Mesoamerican common beans (Phaseolus vulgaris L. Fabales, Fabaceae)
Provedor de dados: 74
Autores: Baldoni,Aisy B.; Ramalho,Magno A. Patto; Abreu,Ângela de Fátima B.
Strategies were investigated for improving efficiency in the use of segregating common bean (Phaseolus vulgaris) populations using crosses between the Andean cultivar BRS-Radiante and the Mesoamerican parent cultivar Carioca-MG by developing populations with 12.5%, 25%, 50%, 75% and 87.5% of the allele frequency of one of the parents. For each of the five populations we evaluated for two traits, the number of days to the beginning of flowering and grain yield (g plot-1), in the F2:3 (sown in February 2006) and F2:4 (sown in July 2006) generation progenies using 15 x 15 lattice design experiments, with 44 progenies (n = 220 plants) plus the two parents and three controls being evaluated for each generation. In terms of variability release, the populations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Backcross; Gene pools; Heritability; Phaseolus vulgaris; Selection gain.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500019

Selection of tomato genotypes for drought tolerance and agronomic potential through different selection indexes
Provedor de dados: 75
Autores: Oliveira,Camila S de; Maciel,Gabriel M; Fraga Júnior,Eusímio F; Peixoto,Joicy Vitória M; Assunção,Vitor B; Marques,Douglas José.
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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Abiotic stress; Selection gains; Backcross; Water deficit.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100102

Sorghum breeding
Provedor de dados: 106
Autores: Krisda Samphantharak; Wasana Wongyai; Sutee Rayakaew; Chaba Amramphai; Thamrongsilpa Pothisoong; Prapon Boonrumpun.
1 ill., 6 tables
Palavras-chave: Sorghum; Breeding; Yields; Adaptability; Early maturity; Genetic diversity; Backcross; Population; ข้าวฟ่าง; การปรับปรุงพันธุ์; ผลผลิต; การปรับตัว; พันธุ์เบา; การผสมกลับ; การปรับปรุงประชากร.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4566

การพัฒนาสายพันธุ์เรณูเป็นหมันโดยวิธีการผสมกลับ
Provedor de dados: 106
Autores: Bang-on Thammasamisorn.
Development of new CMS lines by backcrossing was conducted at Suphan Buri Rice Research Center during 2005-2011. The objective was to develop Thai elite breeding lines to be better varieties of CMS lines adapted to the environment in Thailand. The new CMS lines will be used for research project on hybrid rice production. CMS lines from IRRI were used as donor in repeated backcrossing of 6-7 generations to the recurrent parent, Thai elite breeding line. After seven generations of repeated backcrossing two new CMS lines, SPR06186A (IR58025A/7*SPR98015-59-1-2-2-2) and SPR06189A (IR73328A/7*SPR98015-59-1-2-2-2), were developed. These two lines have one hundred percent of pollen sterility and similar agronomic traits to the recurrent parent. SPR06186A has a...
Tipo: PhysicalObject
Palavras-chave: Cytoplasmic male sterile; CMS line; Hybrid rice; Backcross; Genetic stability; Varieties; Plant breeding; Growth; Seeds quality; Seed set; Pollen sterility; สายพันธุ์เรณูเป็นหมัน; การผสมกลับ; ข้าวลูกผสม; การผสมพันธุ์ข้าว; การปรับปรุงพันธุ์; ลักษณะประจำพันธุ์; การทดสอบพันธุ์; ระยะเวลาออกดอก; เปอร์เซ็นต์การติดเมล็ด; คุณภาพเมล็ดพันธุ์.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5703

การใช้เชื้อพันธุกรรมข้าวโพดไร่เพื่อปรับปรุงพันธุ์ข้าวโพดหวาน โดยวิธีผสมกลับ
Provedor de dados: 106
Autores: Krisda Samphantharak; Nalinee Padsuwan.
3 tables
Palavras-chave: Corn; Maize; Sweet corn; Backcross; Field corn; Germplasm; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; ข้าวโพดหวาน; การปรับปรุงพันธุ์; การผสมกลับ.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4203

Selection strategies in a segregating passion fruit population aided by classic and molecular techniques
Provedor de dados: 53
Autores: Preisigke,Sandra da Costa; Viana,Alexandre Pio; Santos,Eileen Azevedo; Santos,Paulo Ricardo dos; Santos,Valquíria Oliveira dos; Ambrósio,Moisés; Silva,Flávia Alves da; Walter,Fernando Henrique de Barros.
ABSTRACT Combining the use of agronomic, disease-resistance, and molecular informationcan greatly contribute to genetic progress in breeding programs. This study was developed to estimate the genetic distance between genotypes derived from backcrosses and their parents using morphoagronomic and molecular information and information pertaining to resistance to the Cowpea aphid-borne mosaic virus (CABMV), and indicate genotypes with potential for generation advancement. The studied population consisted of 91 genotypes from the first backcross, oneinterspecific hybrid, and the species Passiflora setacea and P. edulis. For morphoagronomic characterization, the traits number of fruits, total fruit weight, average fruit weight, and area under the disease...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora; CABMV; Backcross; Parental proportion.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100047