Characterization of backcross generations obtained under field conditions from oilseed rape-wild radish F1 interspecific hybrids: an assessment of transgene dispersal

1998 ◽  
Vol 97 (1-2) ◽  
pp. 90-98 ◽  
Author(s):  
A. M. Chèvre ◽  
F. Eber ◽  
A. Baranger ◽  
G. Hureau ◽  
P. Barret ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Interspecific Hybrids ◽  
Field Conditions ◽  
Wild Radish

Survival of buried seeds of interspecific hybrids between oilseed rape, hoary mustard and wild radish

1998 ◽  
Vol 58 (3) ◽  
pp. 197-204 ◽  
Author(s):  
René Chadoeuf ◽  
Henri Darmency ◽  
Jacques Maillet ◽  
Michel Renard
Keyword(s):  
Oilseed Rape ◽  
Interspecific Hybrids ◽  
Wild Radish ◽  
Buried Seeds

Genome discrimination in progeny of interspecific hybrids between Brassica napus and Raphanus raphanistrum

Genome ◽  
2003 ◽  
Vol 46 (3) ◽  
pp. 469-472 ◽  
Author(s):  
A Benabdelmouna ◽  
G Guéritaine ◽  
M Abirached-Darmency ◽  
H Darmency
Keyword(s):  
In Situ Hybridization ◽  
Brassica Napus ◽  
Oilseed Rape ◽  
Interspecific Hybrid ◽  
Interspecific Hybrids ◽  
Genomic In Situ Hybridization ◽  
Interspecific Crosses ◽  
Wild Radish ◽  
Raphanus Raphanistrum

Genomic in situ hybridization (GISH) applied to the F1 interspecific hybrid between oilseed rape (Brassica napus, AACC, 2n = 38) and wild radish (Raphanus raphanistrum, RrRr, 2n = 18) showed the predicted 19 chromosomes from B. napus and 9 chromosomes from R. raphanistrum. The very low female fertility of these interspecific hybrids when backcrossed to R. raphanistrum led to only two descendants. Their chromosome number varied between 45 and 48. Both of these progenies showed only 9 chromosomes from R. raphanistrum and 36–39 chromosomes from B. napus. These results indicate the efficiency and limits of GISH as a suitable tool to assess and interpret the behavior of chromosomes after such interspecific crosses. The unexpected chromosome combination is discussed.Key words: genomic in situ hybridization, interspecific hybrid, introgression, oilseed rape, wild radish.

Characterization of interspecific hybrids of Triticum aestivum x Aegilops sp. without 5B chromosome for induced homoeologous pairing

2015 ◽  
Vol 25 (1) ◽  
pp. 117-120 ◽  
Author(s):  
Imran Sheikh ◽  
Prachi Sharma ◽  
Shailender Kumar Verma ◽  
Satish Kumar ◽  
Sachin Malik ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Interspecific Hybrids ◽  
Homoeologous Pairing ◽  
Induced Homoeologous Pairing

Biological and Molecular Characterization of a Crucifer Tobamovirus Infecting Oilseed Rape

2009 ◽  
Vol 47 (7-8) ◽  
pp. 451-461 ◽  
Author(s):  
Li Cai ◽  
Kunrong Chen ◽  
Xuejiang Zhang ◽  
Liying Yan ◽  
Mingsheng Hou ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Oilseed Rape

Vernalization response in spring oilseed rape (Brassica napus L.) cultivars

1994 ◽  
Vol 74 (2) ◽  
pp. 275-277 ◽  
Author(s):  
L. A. Murphy ◽  
R. Scarth
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Vernalization Response ◽  
Brassica Napus L ◽  
Early Maturity ◽  
Breeding Programs ◽  
Cumulative Response ◽  
Cold Requirement ◽  
Key Words:Brassica

Early maturity is a major objective of oilseed rape (Brassica napus L.) breeding programs in western Canada. Maturity of crops is influenced by time of initiation and flowering. The presence of a vernalization requirement affects plant development by delaying floral initiation until the cold requirement of the plant has been satisfied. Five spring oilseed rape cultivars were screened for their response to vernalization. Vernalization treatments consisted of exposure of germinated seeds to 0–42 d at 4 °C. Plants were assessed under a 20-h photoperiod. In general, there was a cumulative response to vernalization, with a decrease in days to each developmental stage as exposure to 4 °C was increased. Vernalization treatment of 6 d at 4 °C was sufficient to decrease both the days to first flower and the final leaf number. The characterization of vernalization response is of interest because variation in flowering time in response to year-to-year variations in the environment could result. Key words:Brassica napus, canola, oilseed rape, vernalization

MOLECULAR CHARACTERIZATION OF INTERSPECIFIC HYBRIDS OF SCENTED ROSES USING RAPD MARKERS

2007 ◽  
pp. 175-179
Author(s):  
N. Kaur ◽  
R.K. Sharma ◽  
D. Dhyani ◽  
S. Karthigeyan ◽  
P.S. Ahuja
Keyword(s):  
Molecular Characterization ◽  
Interspecific Hybrids ◽  
Rapd Markers

scholarly journals Meiosis in Polyploids and Implications for Genetic Mapping: A Review

Genes ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1517
Author(s):  
Nina Reis Soares ◽  
Marcelo Mollinari ◽  
Gleicy K. Oliveira ◽  
Guilherme S. Pereira ◽  
Maria Lucia Carneiro Vieira
Keyword(s):  
Oilseed Rape ◽  
Genetic Maps ◽  
Crop Species ◽  
Map Construction ◽  
Complex Process ◽  
New Gene ◽  
Specific Proteins ◽  
Bivalent Formation ◽  
Essential Knowledge

Plant cytogenetic studies have provided essential knowledge on chromosome behavior during meiosis, contributing to our understanding of this complex process. In this review, we describe in detail the meiotic process in auto- and allopolyploids from the onset of prophase I through pairing, recombination, and bivalent formation, highlighting recent findings on the genetic control and mode of action of specific proteins that lead to diploid-like meiosis behavior in polyploid species. During the meiosis of newly formed polyploids, related chromosomes (homologous in autopolyploids; homologous and homoeologous in allopolyploids) can combine in complex structures called multivalents. These structures occur when multiple chromosomes simultaneously pair, synapse, and recombine. We discuss the effectiveness of crossover frequency in preventing multivalent formation and favoring regular meiosis. Homoeologous recombination in particular can generate new gene (locus) combinations and phenotypes, but it may destabilize the karyotype and lead to aberrant meiotic behavior, reducing fertility. In crop species, understanding the factors that control pairing and recombination has the potential to provide plant breeders with resources to make fuller use of available chromosome variations in number and structure. We focused on wheat and oilseed rape, since there is an abundance of elucidating studies on this subject, including the molecular characterization of the Ph1 (wheat) and PrBn (oilseed rape) loci, which are known to play a crucial role in regulating meiosis. Finally, we exploited the consequences of chromosome pairing and recombination for genetic map construction in polyploids, highlighting two case studies of complex genomes: (i) modern sugarcane, which has a man-made genome harboring two subgenomes with some recombinant chromosomes; and (ii) hexaploid sweet potato, a naturally occurring polyploid. The recent inclusion of allelic dosage information has improved linkage estimation in polyploids, allowing multilocus genetic maps to be constructed.

scholarly journals Reproductive characterization of interspecific hybrids among Capsicum species

2011 ◽  
Vol 11 (3) ◽  
pp. 241-249 ◽  
Author(s):  
Carlos Eduardo da Silva Monteiro ◽  
Telma Nair Santana Pereira ◽  
Karina Pereira de Campos
Keyword(s):  
Male Sterility ◽  
Interspecific Hybrids ◽  
Pollen Viability ◽  
Pollen Grains ◽  
Male Sterile ◽  
Viable Pollen ◽  
Hybrid Combination ◽  
Capsicum Species ◽  
The Cross

The objective of this study was the reproductive characterization of Capsicum accessions as well as of interspecific hybrids, based on pollen viability. Hybrids were obtained between Capsicum species. Pollen viability was high in most accessions, indicating that meiosis is normal, resulting in viable pollen grains. The pollen viability of species C. pubescens was the lowest (27 %). The interspecific hybrids had varying degrees of pollen viability, from fertile combinations (C. chinense x C. frutescens and C. annuum x C. baccatum) to male sterile combinations. Pollen viability also varied within the hybrid combination according to accessions used in the cross. Results indicate that male sterility is one of the incompatibility barriers among Capsicum species since hybrids can be established, but may be male sterile.

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