Plant Crossing
Mostrando 1-12 de 77 artigos, teses e dissertações.
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1. Partially inbred maize lines in topcrosses and hybrid performance
ABSTRACT In plant breeding programs, the selection of potential progenies in early generations of inbreeding is an essential step. Considering that, the adoption of topcrosses helps the breeder in the selection, this study aimed to verify the potential of S2 strains for synthesis of synthetic varieties and to obtain experimental information on yield and agro
Rev. Ceres. Publicado em: 2020-06
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2. Morphological characterization of Coelogyne spp for germplasm conservation of orchids
ABSTRACT Orchid is one of the ornamental plant that has a high aesthetic value. Efforts to increase the quality of orchids can be done by genetic improvement through crossing. The first step to success in orchid crossing requires information on morphological characters of the prospective parents. This study aims to determine the similarity of six species of
Rev. Ceres. Publicado em: 03/10/2019
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3. Special offer while stocks last: high-energy pulse of nectar caused by a massive post-fire flowering of Sinningia elatior (Gesneriaceae) in an area of Cerrado and implications for its pollination
Resumo A intensa floração pós-fogo de Sinningia elatior (Gesneriaceae) foi estudada em uma área de Cerrado. Para estudar o sistema reprodutivo, testes de polinização foram realizados no campo. Espécimes de S. elatior foram encontrados isolados ou agrupados na área de estudo, as flores são tubulares, alaranjadas/avermelhadas e desprovidas de odor. Ap
Rodriguésia. Publicado em: 03/10/2019
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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. Control of plant height by 24 alleles at 12 quantitative trait loci in rice
Abstract Plant height (PH) is controlled by quantitative trait loci (QTLs) in rice. In the present study, a recombinant inbred line population developed by crossing two rice cultivars, Lemont and Yangdao4, was grown in eight environments for QTL analysis. Multiple interval mapping detected 53 PH-QTLs, 39 of which clustered at 12 chromosome regions/putative l
Crop Breed. Appl. Biotechnol.. Publicado em: 01/08/2019
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6. Environmental and physiological effects on cross-ability and seed production of greenhouse cucumber
Resumo: A qualidade das sementes depende de muitos fatores. Neste estudo, foram realizados dois experimentos independentes para investigar os efeitos do horário da polinização, espaçamento dos nós cruzados, idade da flor masculina, número de cruzamentos em cada planta e deleção ou não de outros frutos dos nós sobre a capacidade de cruzamento e prod
J. Seed Sci.. Publicado em: 01/07/2019
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7. Inheritance of harvest index in common bean
Abstract The aim of this study was to verify if the harvest index (HI) of common bean is higher in modern lines, to verify if its estimate varies with the cycle of the plant and environmental conditions, and to obtain information concerning its genetic control (through diallel crossing). For this purpose, six lines were crossed in a diallel. Evaluations were
Crop Breed. Appl. Biotechnol.. Publicado em: 2018-09
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8. Overcoming crossing barriers between jatropha (Jatropha curcas L.) and castor bean (Ricinus communisL.)
Abstract A limitation in improvement of jatropha (Jatropha curcas) has been the low genetic variation among the available germplasm. An alternative to create genetic variability and incorporate desirable traits is through wide crossing. Due to reproductive barriers, wide crossing in jatropha has had limited success. In this experiment, intergeneric hybridiza
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-06
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9. Genetic diversity reduction in improved durum wheat cultivars of Morocco as revealed by microsatellite markers
ABSTRACT It has been argued that genetic diversity in crop varieties has been on the decline in recent times due to plant breeding. This can have serious consequences for both the genetic vulnerability of crops and their plasticity when responding to changes in production environments. It is, therefore, vital for plant breeding programs to maintain sufficien
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-04
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10. Phylogeny, biogeography and divergence times in Passiflora (Passifloraceae)
As part of a long-term investigation on the evolution of Passiflora L., we investigated the divergence ages of the genus and diversification of its subgenera, relating them with biogeographical and/or historical events, and other characteristics of this taxon. The main aim of the present work was to evaluate the biogeographic distribution of this genus to be
Genet. Mol. Biol.. Publicado em: 2012
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11. Natural infection of several Coffea species and hybrids and Psilanthus ebracteolatus by the coffee ringspot virus (CoRSV)
Coffee ringspot is a minor coffee disease caused by the nuclear type of Brevipalpus mite-transmitted virus, Coffee ringspot virus (CoRSV). Recently outbreaks of the disease in some growing regions of the state of Minas Gerais, Brazil, were registered with qualitative and quantitative yield losses. Coffea arabica was the only species registered as natural hos
Scientia Agricola. Publicado em: 2011-08
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12. Soybean cultivar BR-16-AHAS tolerance to the herbicide imazapyr.
The objective of this work was to evaluate the effect of the transgenic soybean BR-16-AHAS genetic constitution on the tolerance to the herbicide imazapyr. BR-16-AHAS was crossed with ten other genotypes. The experimental design was a complete randomized block, in a 2x12x3 factorial arrangement, with two sowing periods (winter and summer), twelve crossing gr
Pesquisa Agropecuária Brasileira. Publicado em: 2011