Restorer Lines
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Extracting female inbred lines from commercial sunflower hybrids.
The objective of this study was to obtain female inbred lines from sunflower (Helianthus annuus) hybrids. A methodology based on altering inbred lines carrying the fertility restorer gene (Rf) obtained from self pollinating hybrids into inbred lines with normal cytoplasm without the Rf gene was described. Further, derived male-sterile inbred lines were devel
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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2. Resistance of sorghum hybrids to Colletotrichum sublineolum: previsibility by lineage progenitor reaction. / ResistÃncia de hÃbridos de sorgo a Colletotrichum sublineolum: previsibilidade por meio da reaÃÃo de linhagens progenitoras
A antracnose (Colletotrichum sublineolum Henn. in Kab. &BubÃk), està disseminada em todas as regiÃes produtoras de sorgo no paÃs. Foi objetivo deste trabalho, caracterizar a diversidade populacional de C. sublineolum em locais de ocorrÃncia de severas epidemias da doenÃa, identificar combinaÃÃes entre linhagens elite capazes de gerar hÃbridos de sor
Publicado em: 2006
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3. Mitochondrial DNA rearrangement associated with fertility restoration and cytoplasmic reversion to fertility in cytoplasmic male sterile Phaseolus vulgaris L
Restoration of pollen fertility to cytoplasmic male sterile (CMS) Phaseolus vulgaris by a nuclear restorer gene provides a system for studying nuclear-cytoplasmic interactions. Introduction of a nuclear restorer gene to this CMS line of P. vulgaris (CMS-Sprite) results in a mitochondrial genome rearrangement similar to that observed upon spontaneous cytoplas
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4. Genetics of Fertility Restoration in the C-Group of Cytoplasmic Male Sterility in Maize
The genetics of fertility restoration of cms-C group cytoplasm of maize was studied using crosses involving stable maintainer lines and lines that restored full pollen fertility. Pollen fertility in the sources of cms-C sterile cytoplasms studied was restored by a single dominant restorer (Rf4) gene. The fertility restoration was sporophytic. Allelism tests
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5. Cytoplasmic male sterility in barley: Evidence for the involvement of cytokinins in fertility restoration
The hypothesis of the association between an increase in cytokinin activity and restoration of anther fertility in msm1 cytoplasm was tested. The following barley lines with Hordeum vulgare cv. Adorra nuclear gene background were studied: Adorra cytoplasm without nuclear restorer gene (fertile), Adorra cytoplasm homozygous for nuclear Rfm1a gene (fertile), m
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6. Nuclear and cytoplasmic genes controlling synthesis of variant mitochondrial polypeptides in male-sterile maize
The polypeptides synthesized in vitro by mitochondria isolated from etiolated maize shoots of a number of different nuclear and cytoplasmic genotypes have been compared by using polyacrylamide gel electrophoresis. We have previously shown that mitochondria from maize plants carrying the T or C forms of cytoplasmically inherited male sterility (cms-T and cms-
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7. Cytoplasmic Sterility Factors in VICIA FABA L
Tissues of cytoplasmic male sterile, maintainer, restorer, and restored lines, and sterile plants which reverted to fertility in Vicia faba were examined in ultrathin sections. Cytoplasmic spherical bodies (CSB), ca. 70 nm in diameter, were observed in tissues of all sterile plants but not in tissues of maintainer, restorer or restored sterile plants. No CSB
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8. Classification of Normal and Male-Sterile Cytoplasms in Maize. II. Electrophoretic Analysis of DNA Species in Mitochondria
Mitochondrial DNA preparations were made from 31 maize lines carrying different sources of cytoplasm in the same nuclear genetic background. The DNAs were analyzed by agarose gel electrophoresis. A number of discrete low molecular weight bands were present in all lines. However, only four different DNA banding patterns were observed. These were correlated wi
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9. Identification of a mitochondrial protein associated with cytoplasmic male sterility in petunia.
The petunia fused gene (pcf), which is associated with cytoplasmic male sterility (CMS), is composed of sequences derived from atp9, coxII, and an unidentified reading frame termed urfS. To determine whether the pcf gene is expressed at the protein level, we produced antibodies to synthetic peptides specified by the coxII and urfS portions of the pcf gene. A
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10. Mitochondrial Aldehyde Dehydrogenase Activity Is Required for Male Fertility in Maize
Some plant cytoplasms express novel mitochondrial genes that cause male sterility. Nuclear genes that disrupt the accumulation of the corresponding mitochondrial gene products can restore fertility to such plants. The Texas (T) cytoplasm mitochondrial genome of maize expresses a novel protein, URF13, which is necessary for T cytoplasm–induced male sterilit
American Society of Plant Physiologists.
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11. Rf8 and Rf* Mediate Unique T-Urf13-Transcript Accumulation, Revealing a Conserved Motif Associated with RNA Processing and Restoration of Pollen Fertility in T-Cytoplasm Maize
Rf8 is a newly described nuclear gene that can substitute for Rf1 to partially restore pollen fertility to male-sterile, T-cytoplasm maize. Families segregating for Rf8 were used to investigate the mechanism of this fertility restoration and to compare it to the restoration conditioned by Rf1. Although Rf8 is unlinked to the rf1 locus, it also alters T-urf13
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12. Instability of S Male-Sterile Cytoplasm in Maize
A number of S male-sterile plants from several shrunken-2 inbred lines were crossed initially with an R138-TR inbred line pollinator carrying the nonrestoring genotype for S sterile cytoplasm. One such cross, involving a male-sterile female parent from inbred line M825, produced, unexpectedly, a number of male-fertile F1 progeny, along with the expected male