Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"male-sterile"”.
-
Analyses of a genic male-sterile mutant in soybean
<p>A new genic male-sterile mutant in soybean was characterized genetically, developmentally, and molecularly. This mutant is controlled by a single recessive gene, which is not allelic to six previously identified soybean genic male-sterile mutants: ms1, ms2, ms3, ms4, ms5, or ms6. No linkage was …
-
Microsporogenesis in Male Fertile and S-Type Cytoplasmic Male-Sterile Maize
Made available in DSpace on 2014-12-14T15:38:05Z (GMT). No. of bitstreams: 1 8009056.pdf: 5244110 bytes, checksum: 0260ee2fe584a90c4dc5ef340014deb9 (MD5) Previous issue date: 1979
-
Molecular Aspects of Nuclear Genome Involvement in S Cytoplasmic Male-Sterile Maize
… the S-type of cytoplasmically inherited male sterility in maize (cms-S) at three levels: (1) nuclear fertility restoring genes; (2) the degree of instability, i.e., the frequency of reversion to fertility; and (3) the proportion of revertants which are due to either nuclear or …
-
Soybean Seed Quality Studies (Scanning Electron-Microscopy, Phomopsis Spp., Alternaria Sp.)
… field pathogen infection of the seed? (3) Why do male sterile soybeans have poor seed quality? (4) What is the relationship and genetics of reproductive growth stages and specific soybean seed quality traits?
-
Towards a Molecular Genetic Analysis of Spermatogenesis in Drosophila
… gonial cell neoplasm, two previously identified sterile mutations, affect the fate of the gonial daughter of the germ line stem cell. We next isolated P-element induced male-sterile mutants, which underwent mapping, complementation and phenotypic analyses. Three of these mutants were …
-
Characterization of Genetic Sources Associated with Restorability and Seed Dimension in Arkansas Restorer Rice Lines
… rice production, and the cultivation of a male sterile line is the most important factor in the success of cross-breeding. One of the key elements of hybrid rice production is to develop a restorer line that is assigned as the male parent. The restorer lines provide viable pollen for …
-
Pollinator Movement and Pollen Transfer in Hybrid Seed Canola
… the transfer of pollen from hermaphroditic (‘male’) to male-sterile (‘female’) plants, facilitated by managed pollinators (honey and leafcutter bees) and wild pollinators. I assessed pollinators in fields of hybrid seed canola located in Southern Alberta to determine what behaviours and …
-
Agronomic performance of soybean [Glycine max (L.) Merr.] hybrids
<p>Male sterility systems identified in soybean [Glycine max (L.) Merr.], combined with insect-mediated cross-pollination have been shown to produce large quantities of hybrid seed that can be useful for the identification of heterotic patterns in soybean. This procedure was used in this study to …
-
Epidemiological aspects of Claviceps africana, causal agent of Sorghum ergot
… that affects non-fertilized ovaries in sorghum male-sterile plants and infects hybrids if there is pollen sterility at flowering time. Sphacelia containing macroconidia could play a role in the survival of the pathogen. This study developed risk assessment models and evaluated environmental …
-
Derivation, fertility and breeding value of doubled monoploids from the diploid potato species, Solanum phureja
… in vitro. Therefore, they were considered male-sterile for practical purposes. Used as female parents, doubled monoploids were able to transmit the 2n pollen trait to their progenies. Two of four doubled monoploids exhibited superior general combining ability over the anther donor under …
-
Multigene Metabolic Engineering Via The Chloroplast Genome
… The transgenic lines were normal except for the male sterile phenotype, lacking pollen. Scanning electron microscopy revealed a collapsed morphology of the pollen grains. Transgenic lines followed an accelerated anther developmental pattern, affecting their development and maturation, resulting …
-
Defining the role of cellulose synthase-like M genes in the plant cell wall
… contrast, CslM2a edited lines showed a striking male sterile phenotype, named nop (no pollen) accompanied by growth defects and parthenocarpy. Assessment using a suite of cell wall antibodies revealed reduced levels and defects in pectin RG-I and AGP components in the pollen mother cells (PMC) …
-
Three studies in marker-assisted plant breeding
… Second, we phenotype F1 rice hybrids of existing male-sterile lines at the International Rice Research Institute and highly stress-tolerant male lines used in development of Green Super Rice varieties. We select the F1 hybrids for yield performance and their parents with outstanding general …
-
The effects of novel genetic diversity on yield and yield traits in a hybrid wheat pre-breeding programme
… by crossing diverse and commercial elite male parents with three male-sterile testers as female parents. Results were variable with some pre-breeding hybrids performing well and hybrids generally showing better yield stability than inbreds. A separate trial investigated the optimal sowing …
-
FARINELLI: ein testisspezifisches VAP-Protein und seine Funktion in der Drosophila-Spermatogenese
… farinelli (fan), dessen Ausfall einen männchensterilen Phänotyp hervorruft. Obwohl fan bereits prämeiotisch exprimiert wird, können Defekte in der Mutante erst postmeiotisch, während der Differenzierung der Spermatiden, beobachtet werden. Bei Drosophila melanogaster liegen nach der Meiose …