Backcross
Mostrando 1-12 de 352 artigos, teses e dissertações.
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1. Selection strategies in a segregating passion fruit population aided by classic and molecular techniques
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 t
Bragantia. Publicado em: 2020-03
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2. Genome composition and pollen viability of Jatropha (Euphorbiaceae) interspecific hybrids by Genomic In Situ Hybridization (GISH)
Abstract Interspecific hybridization is required for the development of Jatropha curcas L. improved cultivars, due to its narrow genetic basis. The present study aimed to analyze the parental genomic composition of F1 and BC1F1 generations derived from interspecific crosses (J. curcas/J. integerrima and J. curcas/J. multifida) by GISH (Genomic In Situ Hybrid
Genet. Mol. Biol.. Publicado em: 20/01/2020
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3. Backcrosses in a segregating population of Passiflora mediated by morphoagronomic and resistance traits
ABSTRACT The present study aims to characterize the genetic diversity of Passiflora setacea, P. edulis, their hybrids, and first-backcross progenies, and to indicate promising recombinants for generation advancement in a breeding program for transferring resistance to cowpea aphid-borne mosaic virus (CABMV). Ninety-one genotypes were evaluated for 37 morphoa
Bragantia. Publicado em: 13/12/2019
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4. Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce
RESUMO O entendimento da genética e das interações gênicas envolvidas na expressão de determinadas características se torna um fator determinante para a melhor exploração seu uso. Este desconhecimento das bases genéticas envolvidas impacta diretamente no desenvolvimento de programas de melhoramento que aliem uma ou mais características desejáveis
Ciênc. agrotec.. Publicado em: 30/09/2019
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5. Rbc2, a new dominant gene for resistance of soybean to Cowpea mild mottle virus: Inheritance and mapping
Abstract The objective of this work was to study the inheritance of soybean resistance to Soybean Steam Necrosis (SSN) and to map the resistance gene(s), using an F2 population from the cross between the soybean cultivars BRS 133 (resistant) and CD 206 (susceptible). A phenotypic evaluation was performed under controlled conditions, in a greenhouse. In a pop
Crop Breed. Appl. Biotechnol.. Publicado em: 2018-04
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6. Performance of transgenic and conventional soybean plants subjected to bioassay for detection of glyphosate tolerant seeds
Abstract The adoption of genetically modified soybean cultivars is increasing annually around the world, which indicates the excellence of these genotypes. For soybean breeding, the use of such cultivars in a backcross program relies on the ability to detect the transgenic trait. The germination test in a moistened substrate with glyphosate is effective and
Crop Breed. Appl. Biotechnol.. Publicado em: 2018-03
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7. Genetic analysis of reciprocal differences in the inheritance of in vitro characters in pearl millet
Abstract Reciprocal differences persist in nature because of the unequal contribution of cytoplasmic determinants from male and female gametes to the zygote. The inheritance of genetic differences is an important factor that influences various traits, including somatic embryogenesis and regeneration in vitro. In this report, we estimate the cytoplasmic and m
Genet. Mol. Biol.. Publicado em: 2016-03
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8. Yield, market quality, and leaf spots partial resistance of interspecific peanut progenies
Development of leaf spots resistant runner peanut cultivars is one of the major demands in Brazil. In the 2009/10 crop season, 12 pre-breeding progenies (LPM) were selected out of 380 plants of an interspecific BC1F3 population for leaf spots resistance and agronomic traits. In the 2010/11, the 12 LPMs were evaluated for leaf spots resistance, without fungic
Crop Breed. Appl. Biotechnol.. Publicado em: 2015-09
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9. Chromosomal localization of microsatellite loci in Drosophila mediopunctata
Drosophila mediopunctata has been used as a model organism for genetics and evolutionary studies in the last three decades. A linkage map with 48 microsatellite loci recently published for this species showed five syntenic groups, which had their homology determined to Drosophila melanogaster chromosomes. Then, by inference, each of the groups was associated
Genet. Mol. Biol.. Publicado em: 2015-03
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10. MT BB: tomato cultivar for practical classes of plant genetics and breeding
MT BB cultivar originated from a backcross program which aimed at adding two recessive mutations that alter leaf architecture (potato leaf - c) and flower color (white flower - wf) to Micro-Tom cultivar, which is a tomato miniature. MT BB was developed for use in practical classes of genetics and breeding in both undergraduate and graduate courses.
Crop Breed. Appl. Biotechnol.. Publicado em: 2013-12
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11. Selection of carioca common bean progenies resistant to white mold
A backcross breeding program between commercial common bean cultivars (VC3 and M20) and sources of resistance (Ex-Rico 23 and G122) was conducted with a view toward selecting carioca (beige with brown stripes) progenies resistant to white mold. Forty-eight progenies (27 F2:6 BC1 and 21 F1:5 BC2) were evaluated for yield, growth habit, grain type and pathogen
Crop Breed. Appl. Biotechnol.. Publicado em: 2013-10
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12. Phenotypic, cytogenetic and spike fertility characterization of a population of male-sterile triticale
Triticale (X Triticosecale Wittmack) is a good cereal for production of flour and feed. A segregating population of triticale was developed from a male-sterile (MS) plant. To determine whether this new source of male sterility in triticale is appropriate for use in breeding programs the expression of the male sterility phenotype was characterized through spi
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-02