Characterization of interploid hybrids from crosses between Brassica juncea and B. oleracea and the production of yellow-seeded B. napus.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Jing WenTingdong Fu

Abstract

Yellow-seeded Brassica napus was for the first time developed from interspecific crosses using yellow-seeded B. juncea (AABB), yellow-seeded B. oleracea (CC), and black-seeded artificial B. napus (AACC). Three different mating approaches were undertaken to eliminate B-genome chromosomes after trigenomic hexaploids (AABBCC) were generated. Hybrids (AABCC, ABCC) from crosses AABBCC × AACC, AABBCC × CC and ABCC × AACC were advanced by continuous selfing in approach 1, 2 and 3, respectively. To provide more insight into Brassica genome evolution and the cytological basis for B. napus resynthesis in each approach, B-genome chromosome pairing and segregation were intensively analyzed in AABCC and ABCC plants using genomic in situ hybridization methods. The frequencies at which B-genome chromosomes underwent autosyndesis and allosyndesis were generally higher in ABCC than in AABCC plants. The difference was statistically significant for allosyndesis but not autosyndesis. Abnormal distributions of B-genome chromosomes were encountered at anaphase I, including chromosome lagging and precocious sister centromere separation of univalents. These abnormalities were observed at a significantly higher frequency in AABCC than in ABCC plants, w...Continue Reading

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Citations

Dec 4, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jinjin JiangYouping Wang
Jul 25, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yue WangYou-Ping Wang
Mar 1, 2013·Journal of Integrative Plant Biology·Jinjin JiangYouping Wang
Jul 3, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Hai-Long YuYang-Yong Zhang

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