Results 21 to 30 of about 144,774 (218)
A chromosome-specific estimate of transmission of heterozygosity by 2n gametes in potato. [PDF]
Journal of Heredity, 2008 Polyploid plants are formed when numerically unreduced (2n) gametes participate in fertilization. Based on cytological and genetic analyses, modes of 2n gamete formation have been determined for a number of plant species. Gametes formed by a first-division restitution (FDR) mechanism contain nonsister chromatids near the centromere, whereas those ...
S. Peloquin +3 more
semanticscholar +3 more sources
Abnormal chromosome behavior during meiosis in the allotetraploid of Carassius auratus red var. (♀) × Megalobrama amblycephala(♂) [PDF]
, 2014 BACKGROUND: Allopolyploids generally undergo bivalent pairing at meiosis because only homologous chromosomes pair up. On the other hand, several studies have documented abnormal chromosome behavior during mitosis and meiosis in allopolyploids plants ...
Jing Dai +5 more
core +1 more source
Occurrence of SDR 2N-gametes in Lilium Hybrids
Breeding Science, 2004 The mechanism of SDR 2n-pollen formation was analyzed in two intra-sectional diploid (2n = 2x = 24) Lilium hybrids (Enchantment × 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 ...
Lim, K.B. +4 more
openaire +3 more sources
Biologia Plantarum, 2011 Sexual polyploidization has both a theoretical as well as an applied significance. Morphological screening for large pollen grains and shape of pollen produced by the individual, cytological investigation of hybrid progeny, and unbalanced separation of ...
R. S. Talluri
doaj +1 more source
Character changes and Transcriptomic analysis of a cassava sexual Tetraploid
BMC Plant Biology, 2021 Background Cassava (Manihot esculenta Crantz) is an important food crop known for its high starch content. Polyploid breeding is effective in its genetic improvement, and use of 2n gametes in sexual polyploid breeding is one of the potential methods for ...
Xia Chen +8 more
doaj +1 more source
Selection for increasing 2n gamete production in red clover [PDF]
Cropp Breeding and Applied Biotechnology, 2004 Three selection cycles were performed in the red clover cultivars Quiniqueli, Redland and Keenland to increase the 2n gamete production. Unreduced gamete production was estimated by the giant pollen grain (GP) production. Plants with more than 1% of GP were selected as progenitors from the original population; plants with at least 2% and 3% of GP ...
C. Simioni +3 more
openaire +1 more source
Introgression in interspecific hybrids of lily [PDF]
, 2002 In order to introduce new desirable characters into the cultivar assortment of lily a range of interspecific crossing barriers has to be overcome. By using various pollination and embryo rescue techniques pre- and postfertilization barriers were overcome
Lim, K.B. +2 more
core +2 more sources
Effective Induction of Fertile Gametes in Oriental × Trumpet (OT) Lily by High Temperatures
Plants, 2023 Lily is a very important bulb crop, and interspecific distant hybridization is a crucial method of lily breeding. However, F1 interspecific hybrids tend to be highly sterile due to low levels of genetic homozygosity.
Yi-Xuan Huang +6 more
doaj +1 more source
Triploid cultivars of Cymbidium act as a bridge in the formation of polyploid plants
Frontiers in Plant Science, 2022 Triploid is considered a reproductive barrier and also a bridge in the formation of polyploids. However, few reports are available in Cymbidium. In this study, diploid ‘Xiaofeng’, sexual triploid ‘Yuchan’ and ‘Huanghe’ of Cymbidium were used to evaluate ...
Man-Man Li +8 more
doaj +1 more source