MAPPING SEED STORAGE PROTEIN LOCI SEC-1 AND SEC-3 IN RELATION TO 5 CHROMOSOMAL REARRANGEMENTS IN RYE (SECALE-CEREALE L)

被引:26
作者
SYBENGA, J [1 ]
PARMAR, S [1 ]
VANEDEN, J [1 ]
SHEWRY, P [1 ]
机构
[1] ROTHAMSTED EXPTL STN, DEPT BIOCHEM, HARPENDEN AL5 2JQ, HERTS, ENGLAND
关键词
Chromosome; 1R; Mapping; Rearrangements; Secale; Secalin loci;
D O I
10.1007/BF00225952
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Linkage relationships were established between the secalin loci, Sec 1 (40-K gamma and omega secalins, homologous to the wheat gliadins) and Sec 3 (HMW = high-molecular-weight secalins, homologous to the wheat HMW glutenin subunits), and five chromosomal rearrangements involving chromosome 1R of rye (Secale cereale L.). These were: interchanges T273W (1RL/5RS), T306W (1RS/5RL), and T850W (1RS/ 4RL), Robertsonian centromere split Rb1RW and the interchanged Robertsonian split Rb2R/248W. The analysis established the linkage relationships between the secalin loci and the breakpoints of the rearrangements, in addition to the quantitative effects of the rearrangements on the linkage. Sec-1 is located in the satellite at a position at least 2.5 cMorgan from the proximal border of the terminal C-band, and about 30 cMorgan from the nucleolar organizing region (NOR). The locus is also physically closer to the terminal C-band than to the NOR, but not as much as corresponds with the map distances. Similarly, the physical distance between Sec-3 and the centromere is greater than corresponds with the recombination frequency (0%-9%). Although overall recombination in 1RL remains the same, recombination between the centromere and Sec-3 is greatly reduced in the Robertsonian split combined with the interchange. This is not the case with the single Robertsonian split. © 1990 Springer-Verlag.
引用
收藏
页码:201 / 208
页数:8
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