Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 362062
Title Occurrence of SDR 2N-gametes in Lilium hybrids
Author(s) Lim, K.B.; Shen, T.M.; Barba Gonzalez, R.; Ramanna, M.S.; Tuyl, J.M. van
Source Breeding Science 54 (2004)1. - ISSN 1344-7610 - p. 13 - 18.
Department(s) Laboratory of Plant Breeding
PRI Biodiversity and Breeding
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) interspecific hybrids - bc2 progenies - potato - mutants - desynapsis - fertility - crosses - pollen - gish
Abstract The mechanism of SDR 2n-pollen formation was analyzed in two intra-sectional diploid (2n = 2x = 24) Lilium hybrids (Enchantment x L. pumilum). Variable frequencies of 2n-pollen were found. Meiotic analysis indicated that the intra-sectional hybrids showed perfect chromosome pairing in most cases at metaphase I and normal anaphase I movement of pollen mother cells (PMCs), but produced 2n-pollen by second division restitution (SDR). A high bivalent formation (11.9II and 11.8II, respectively) at metaphase 1, irregular meiotic division such as unbalanced chromosome separation and chromatic fragmentation resulted yet in acceptable pollen fertility for cross-pollination. The hybrids were fertile, and when used as male parents, offspring could tie generated. The significance of the occurrence of 2n-pollen for the breeding of lilies was analyzed.
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