Results 21 to 30 of about 20,845 (229)
Separation of 2n Potato Pollen from a Heterogeneous Pollen Mixture by Velocity Sedimentation [PDF]
HortScience, 1990 A method is described for separating large and small pollen effectively from a heterogeneous mixture. This method potentially is applicable to separation of pollen grains of different ploidy levels, since “unreduced” 2n pollen is larger than normal pollen (n); it might then be used to increase the efficiency of a breeding program employing sexual ...
Charles J. Simon, John C. Sanford
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The Chromosome Number of Schaffnerella Gracilis (Gramineae, Chloridoideae) [PDF]
, 2002 The first ever chromosome report for the monotypic genus Schaffnerella (Grarnineae, Chloridoideae) is 2n = 20 (10 II) from pollen parent cells at diakinesis, which indicates diploidy and a base number of 10. The close relative Lycurus likewise has x = 10,
Columbus, J. Travis +1 more
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Acta Agrobotanica, 2012 The study of the morphology of pollen concerned eight species of the genus Taraxacum. Seven types were chosen with a different number of chromosomes belonging to the section Palustria: Taraxacum paucilobum 2n = 3x = 24, T.
Jolanta Marciniuk +1 more
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Toward in vitro fertilization in Brachiaria spp. [PDF]
, 2010 Brachiaria are forage grasses widely cultivated in tropical areas. In vitro pollination was applied to accessions of Brachiaria spp. by placing pollen of non-dehiscent anthers on a solid medium near isolated ovaries.
Alves, E.R. +5 more
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Phylogenetic relationships in Betula (Betulaceae) based on AFLP markers [PDF]
, 2008 The genus Betula comprises various species in boreal and temperate climate zones of the Northern Hemisphere. The taxonomy of Betula is controversial and complicated by parallel evolution of morphological traits, polyploidization events, and extensive ...
Gilissen, L.J.W.J. +4 more
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Use of 2n Giant Pollen to Produce Nonaploid Japanese Persimmon [PDF]
HortScience, 1997 Distribution of pollen diameter of Japanese persimmon cv. Zenjimaru (2n = 6x, × = 15) was determined using pollen grains hydrated with CPW solution supplemented with 0.9 M mannitol. Mean diameter of giant pollen grains (65 μm) was 1.3 times longer than that of normal pollen grains (50 μm).
R. Tao, T. Ohkuma, M. Tamura, A. Sugiura
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Unreduced megagametophyte production in lemon occurs via three meiotic mechanisms, predominantly second-division restitution [PDF]
, 2017 Unreduced (2n) gametes have played a pivotal role in polyploid plant evolution and are useful for sexual polyploid breeding in various species, particularly for developing new seedless citrus varieties.
Houssem Rouiss +5 more
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A general stochastic model for sporophytic self-incompatibility [PDF]
, 2011 Disentangling the processes leading populations to extinction is a major topic in ecology and conservation biology. The difficulty to find a mate in many species is one of these processes.
Billiard, Sylvain, Tran, Viet Chi
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Acta Agronómica, 2017 The genus Capsicum comprises a large group of hot and sweet peppers, with different morphological varieties and degree of fruits pungency. Due to its active principles is widely used in cooking and in traditional medicine, being sold in large worldwide ...
Viviane de Souza Macedo +4 more
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Induction of viable 2n pollen in sterile Oriental × TrumpetLiliumhybrids [PDF]
The Journal of Horticultural Science and Biotechnology, 2016 ABSTRACTIn order to induce viable 2n pollen from highly sterile diploid Oriental × Trumpet (OT) (Lilium), N2O was used to treat flower buds of four sterile diploid OT cultivars (‘Nymph’, ‘Gluhwein’, ‘Yelloween’, and ‘Shocking’) at different stages of meiosis. There was no pollen germination in the controls.
Luo, J.R. +3 more
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