منابع مشابه
Analysis of nuclear DNA content in monosomic maize plants
Five maize monosomics were analyzed for their nuclear DNA content. Several hundred seeds of R/r-X1 X mutants were grown for two weeks and monosomics with missing chromosomes were identified based on their mutant phenotypic characteristics. Nuclei were isolated from both normal and monosomic two-week old seedlings, and stained with 4,6-diamidino-2-phenylindole (DAPI) and propidium iodide (PI) fl...
متن کاملCOMBINING ABILITY AND HETEROSIS IN MAIZE (Zea mays L.)
A line × tester analysis was conducted in maize involving 12 lines and 3 testers for grain yield and its components to determine the heterosis as well as general combining ability (GCA) and specific combining ability (SCA) effects. Highly significant genotypic differences were observed indicated wide range of variability present among the genotypes. GCA and SCA variance for yield per plant numb...
متن کاملGenomic dosage effects on heterosis in triploid maize.
The genetic basis of hybrid vigor or heterosis has been debated for more than a century. A popular hypothesis to explain this phenomenon is that there are different slightly deleterious recessive homozygous alleles in the two parents and that these alleles are complemented in the hybrid so that the biomass and fertility exceed both parents. To address the complementation hypothesis in a direct ...
متن کاملGenotype-by-environment interactions affecting heterosis in maize
The environment can influence heterosis, the phenomena in which the offspring of two inbred parents exhibits phenotypic performance beyond the inbred parents for specific traits. In this study we measured 25 traits in a set of 47 maize hybrids and their inbred parents grown in 16 different environments with varying levels of average productivity. By quantifying 25 vegetative and reproductive tr...
متن کاملHeterosis Is Prevalent for Multiple Traits in Diverse Maize Germplasm
BACKGROUND Heterosis describes the superior phenotypes observed in hybrids relative to their inbred parents. Maize is a model system for studying heterosis due to the high levels of yield heterosis and commercial use of hybrids. METHODS The inbred lines from an association mapping panel were crossed to a common inbred line, B73, to generate nearly 300 hybrid genotypes. Heterosis was evaluated...
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ژورنال
عنوان ژورنال: Heredity
سال: 1993
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1993.139