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The development and isozyme analysis of hybrids between Brassica napus and Raphanus sativus

Pan Daren1 Friedt W2(1 College of Crop Science, FAU, Fuzhou 350002; 2 Institute for Crop Production and Breeding I, JustusLiebigUniversitaet, Giessen, 35390, Germany)  
Since sexual hybridizations in the Cruciferae family between Brassica napus and Raphanus sativus is possible, it is feasible to transfer nematode resistant gene(s) from R. sativus into B. napus. In the present research, intergeneric sexual hybridization was applied to aid the transfer and the application of in vitro ovule culture confirmed that this embryo rescue technique was a successful tool to obtain hybrids from crosses involving B. napus and R. sativus. By using the embryo rescue technique 133 BC1individuals derived from the cross of bridging hybrid allohexaploids (AACCRR 2n=56) × B.napus and 145 BC2hybrids derived from the cross 〔allohexaploids(AACCRR) × B. napus〕× B. napus were obtained in different cross combinations. Cytological studies of BC1individuals, which included both AACC and RR genome, indicated that the somatic chromosome numbers of BC1individuals ranged from 42 to 47. The chromosome numbers of BC2individuals ranged from 37 to 47. The BC1 and BC2 plants showed a large variation for both male and female fertility. The results of POX and GPI isozyme analysis suggested that the possibility to transfer important traits from Oilradish (Raphanus sativus L. ssp. oleiferus) to B. napus could be increased through following backcrosses.
【CateGory Index】: S565.4
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1 Pan Daren (The Key Laboratory of Sugarcane Genetics and Breeding of Ministry of Agriculture of P.R. China, Fujian Agricultural University, Fuzhou 350002);Analysis of nematode resistance in BC_2 hybrids obtained from crossing between Brassica napus×Raphanus sativus[J];JOURNAL OF FUJIAN AGRICULTURAL UNIVERSITY(NATURAL SCIENCE);1999-04
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