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通过Giemsa C—带技术证实了突变体龙辐83-10877是7 AL/7 RL的纯合易位系。同时初步明确了有疑问染色体,为突变体的进一步研究和开发利用打下了基础。植物染色体Giemsa分带技术是六十年代末七十年代初国外兴起的一项细胞学新技术。我国从1978年以来不少单位开展了这项研究,但是,最初多是在一些染色体数目少而染色体较大的作物上如黑麦、蚕豆等重复国外的实验。八十年代以后在应用方面的报道逐渐增多,方法也有所改进。最初的C-带技术在黑麦上显带明显,而在小麦上不显带。1986年Endo报道了利用C-带技术能鉴定普通小麦的全部21对染色体,使C-带技术的应用更为广泛。由于黑麦的端粒异染色质成份比小麦高的多,所以黑麦比小麦更具有优先显带优势,而小麦和黑麦的每一条染色体所显带的位置不同,故可根据标准带型加以区分。染色体的易位有自然发生和人工诱变两大途径。通过辐射处理远缘杂交后代可以引起染色体畸变,创造出许多在染色体结构上发生变异的优良株系。黑麦属对增加六倍体栽培小麦遗传变异和种质具有很大潜力。自从1956年soars报道了通过创造染色体易位,将外源染色体片断导入普通小麦以来,育种工作者相继采用各种不同方法创造了一大批具有优良农艺性状的易位系和代换系等,有的直接用于生产,获得了良好的经济效益。从1980年我们在这方面进行了大量研究,通过辐射处理远缘杂交材料选育出了一批具有优良农艺性状的品系,龙辐麦四号(6R/6B易位系):已命名推广,有两份材料已进入省区域试验,还有十余份材料正在进行异地鉴定。为了进一步认识这些材料的变异性质和遗传本质,使它们在品种改良中发挥更大作用。我们从1986年以来,结合辐射遗传育种,开展了Giemsa显带的应用研究。
The mutant Longfu 83-10877 was confirmed by the Giemsa C-band technique to be a homozygous translocation line of 7 AL / 7 RL. At the same time, the chromosomes in question were initially identified, laying a foundation for further research, development and utilization of mutants. Plant chromosome Giemsa zoning technology is the late sixties late seventy rise abroad a new cytology technology. Since 1978, many units in our country have carried out this research. However, most of the experiments were carried out on some repetitive foreign experiments such as rye and broad bean on a few chromosomes with large chromosomes. Since the 1980s, there has been a growing number of reports on applications, and methods have also been improved. The original C-banding technique was evident on rye but not on wheat. Endo 1986 reported the use of C-banding techniques to identify all 21 pairs of common wheat chromosomes, making the C-band technique more widely used. Because rye telomeres heterochromatin composition is much higher than wheat, rye has more preferential predominance than wheat, wheat and rye each of the chromosomes with different locations, it can be based on the standard band Be distinguished. Chromosomal translocation occurs naturally and artificially mutated two ways. Treatment of distant hybrid progeny by radiation can cause chromosomal aberrations and create many fine lines that mutate in the chromosomal structure. Triticeae have great potential to increase the genetic variation and germplasm of hexaploid cultivated wheat. Since soars in 1956 reported introducing foreign chromosomal segments into common wheat by creating chromosomal translocations, breeders have used a variety of different methods to create a large number of translocations and substitution lines with superior agronomic traits, among others The direct use for the production, access to good economic benefits. Since 1980, a large number of studies have been conducted in this field. A series of lines with excellent agronomic traits have been bred by radiation treatment of distant hybrid materials. Longfumai IV (6R / 6B translocation line) has been named to promote, Two materials have been tested in the provincial area, and more than a dozen materials are being field tested. In order to further understand the variability and genetic nature of these materials, make them play a greater role in breed improvement. Since 1986, we have applied Giemsa banding in combination with radiation genetic breeding.