Results 131 to 140 of about 2,201 (178)

Genome-Wide Identification and Hormone-Induced Expression Analysis of the Anthocyanidin Reductase Gene Family in Sainfoin (<i>Onobrychis viciifolia</i> Scop.). [PDF]

Int J Mol Sci
Hu Y, Jiang G, Wang J, He H, Liu L, Du P, Li H, Wang F, Xie Q.   +8 more
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Autopolyploidy exacerbates dominance masking under negative frequency-dependent selection : evidence from sporophytic self-incompatibility in Arabidopsis arenosa and A. lyrata

Vekemans X, Kolesnikova U, Vlcek J, Genete M, Dufour A, Welti R, Poux C, Castric V, Kolar F, Novikova P.   +9 more
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Frequency of Quadrivalents in Autotetraploid Plants

Nature, 1960
THE cytological examination of chromosomes at meiosis in autotetraploid plants is an important part of the study of chromosome behaviour. Cytological studies have varied in intensity from casual observations at meiosis to meticulous analyses of all configurations observable, including an estimate of the frequency of quadrivalent formation.
J W, MORRISON, T, RAJHATHY
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Selection in autotetraploids

Theoretical and Applied Genetics, 1970
Theoretical studies indicated that response to selection would always be greater in diploid than in autotetraploid populations when gene frequency was the same in both, and that situations in which little or no response to selection could be expected would be more frequent in autotetraploids.
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Synapsis in a natural autotetraploid

Genome, 1999
To test assumptions of the autotetraploid chromosome pairing model regarding events during synapsis, whole-mount spreads of synaptonemal complexes (SCs) of Machaeranthera pinnatifida (=Haplopappus spinulosus) (Asteraceae) (2n = 4x = 16) were analyzed by electron microscopy. On the assumption of one synaptic initiation per chromosome arm, each pachytene
Donald P. Hauber, Aaron Reeves, Stephen M. Stack   +2 more
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Autotetraploid gene segregation

Theoretical and Applied Genetics, 1973
Autotetraploid gene segregation was studied in Zea mays L. using a marking system of two very closely linked genes (A 1 and Sh 2) in the repulsion phase. This system makes it possible to identify many euploid and aneuploid genotypes and enables the estimation of some parameters of autotetraploid gene segregation such as double reduction, numerical ...
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The theory of inbreeding in autotetraploids

Journal of Genetics, 1934
Expressions are found for the rate of decrease of heterozygosis when brother and sister are mated in a tetraploid species. Various methods of arriving at a pure line are compared.
M. S. Bartlett, J. B. S. Haldane
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Induced autotetraploid grape mutants

Cytology and Genetics, 2011
The methods of experimental mitotic and meiotic polyploidy in grapes are represented in the article. Results of cytological, histo-anatomical, biomorphological researches of induced autotetraploids are shown. Genetic characteristics, parameters of generative organs, quantitative and structural genome changes were studied.
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Cytology of the Autotetraploid Rye

Botanical Gazette, 1943
1. The autotetraploid rye (Secale cereale) shows gigantism in cell size as well as in the plant as a whole. 2. The meiotic metaphase shows a maximum number of quadrivalents of 4, and the mean number per cell is 1.05. No multivalents were found in 28.6 per cent of the cells. 3.
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Gene segregation in autotetraploids

The Botanical Review, 1945
Three main theories of autotetraploid segregation have been propounded, the Muller hypothesis based on the random assortment of chromosomes at meiosis, the Haldane hypothesis based on the random assortment of chromatids, and the Mather hypothesis in which the ratios are considered to be not fixed but varying according to the amount of quadrivalent ...
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