NDLI: Origin of new Brassica types from a single intergeneric hybrid between B. rapa and Orychophragmus violaceus by rapid chromosome evolution and introgression

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Origin of new Brassica types from a single intergeneric hybrid between B. rapa and Orychophragmus violaceus by rapid chromosome evolution and introgression

Content Provider	Springer Nature Link
Author	Xu, Chuan Yuan Wan Yan, Rui Hong Li, Zai Yun
Copyright Year	2007
Abstract	Many novel lines were established from an intergeneric mixoploid between Brassica rapa (2n = 20) and Orychophragmus violaceus (2n = 24) through successive selections for fertility and viability. Pedigrees of individual F$_{2}$ plants were advanced to the 10th generation by selfing. Their breeding habit was self-compatible and different from the self-incompatibility of their female parent B. rapa, and these lines were reproductively isolated to different degrees from B. rapa and B. napus. The lines with high productivity showed not only a wide spectrum of phenotypes but also obvious variations in fatty acid profiles of seed oil and glucosinolate contents in seed meal. These lines had 2n = 36, 37, 38, 39 and 40, with 2n = 38 being most frequent (64.56%), and no intact O. violaceus chromosomes were detected by genomic in situ hybridization (GISH) analysis. Amplified fragment length polymorphism (AFLP) analyses revealed a high extent of variation in genomic compositions across all the lines. O. violaceus-specific bands, deleted bands in B. rapa and novel bands for two parents were detected in these lines, with novel bands being the most frequent. The morphological and genetic divergence of these novel types derived from a single hybrid is probably due to rapid chromosomal evolution and introgression, and provides new genetic resources for rapeseed breeding.
Starting Page	249
Ending Page	257
Page Count	9
File Format	PDF
ISSN	00221333
Journal	Journal of Genetics
Volume Number	86
Issue Number	3
e-ISSN	09737731
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-01-26
Publisher Institution	Indian Academy of Sciences
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	intergeneric hybrid genomic in situ hybridization (GISH) amplified fragment length polymorphism (AFLP) chromosome introgression Brassica rapa Orychophragmus violaceus Evolutionary Biology Animal Genetics and Genomics Plant Genetics & Genomics Microbial Genetics and Genomics Life Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics

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