Results 161 to 170 of about 144,774 (218)
The evolution of tandem repeat sequences under partial selfing and different modes of selection
Sudbrack V, Mullon C.
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Plant Cell Reports, 2022
Epidendrum produces 2n gametes with high frequency. This paper is the first to report on multiple pathways for forming 2n gametes, meiotic defeats, and pre-meiotic chromosome doubling. Unreduced 2n reproductive cells are predominantly involved in pathways that lead to polyploid plants. Although one of the most common pathways for inducing 2n gametes is
H. Kondo +3 more
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Epidendrum produces 2n gametes with high frequency. This paper is the first to report on multiple pathways for forming 2n gametes, meiotic defeats, and pre-meiotic chromosome doubling. Unreduced 2n reproductive cells are predominantly involved in pathways that lead to polyploid plants. Although one of the most common pathways for inducing 2n gametes is
H. Kondo +3 more
semanticscholar +3 more sources
Screening A. ventricosa populations for 2n gametes
Euphytica, 2018Sexual polyploidization via the formation of 2n gametes has been acknowledged as the most significant evolutionary mode of polyploidization among plant species. The present study was conducted in order to determine whether 2n gametes are present in the C-genome diploid Avena ventricosa Bal.
N. Nikoloudakis, A. Aissat, A. Katsiotis
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Exploitation of induced 2n-gametes for plant breeding
Plant Cell Reports, 2013Unreduced gamete formation derived via abnormal meiotic cell division is an important approach to polyploidy breeding. This process is considered the main driving force in spontaneous polyploids formation in nature, but the potential application of these gametes to plant breeding has not been fully exploited. An effective mechanism for their artificial
A. Younis, Y. Hwang, K. Lim
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The significance of 2N gametes in potato breeding
Theoretical and Applied Genetics, 1977Phureja-haploid Tuberosum hybrids, which produce 2n gametes in addition to n gametes, were used to obtain diploid progenies in 2x - 2x matings, and tetraploid progeny in 4x - 2x matings. Seven of these diploid clones were intermated in a modified diallel design, and also crossed to seven cultivars, to obtain 21, 16-clone diploid; and 49 (35, 2x X 4x ...
A. Mendiburu +3 more
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Polyploid evolution via 2n gametes
American Potato Journal, 1977Polyploid evolution is evident in several important taxonomic series of the tuber-bearing Solanums. Polyploids can result from the functioning of 2n gametes following both intra and inter-ploidy matings. The bilateral and unilateral sexual polyploidizations (BSP and USP, respectively) are greatly facilitated by the existence of genetically determined ...
A. Nijs, S. Peloquin
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The effect of 2n gametes on sex ratios in Actinidia
Sexual Plant Reproduction, 2012Sex can sometimes lead to complications. In some crops, 2n gametes have been exploited by plant breeders to transfer genetic variation between taxa of different ploidy levels. However, their role and use in dioecious genera have received relatively little attention.
A. Seal +4 more
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Analysis of transmission of heterozygosity by 2n gametes in Populus (Salicaceae)
Tree Genetics & Genomes, 2015It is well known that polyploidy is a major force in plant evolution and diversification. Evaluating the transmission of heterozygosity by 2n gametes with different formation mechanisms is of crucial importance. In the present study, 120 triploid hybrids [originating from first-division restitution (FDR), second-division restitution (SDR), and ...
Chunbo Dong, Y. Suo, Jun Wang, X. Kang
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Selection for 2n gametes and tuberization inSolanum chacoense
American Potato Journal, 1980A breeding scheme is outlined which broadens the genetic base of the potato by incorporation of germplasm fromS. chacoense (Argentina) with Group Phureja and haploids of Group Tuberosum. Selection for adaptation to cultivation and production of 2n gametes is carried out at the diploid level, with the benefits of disomic ratios.S.
E. Leue, S. Peloquin
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