Genome analysis in Triticum zhukovskyi, a new hexaploid wheat

摘要: 1. The karyotype of T. zhukovskyi, a hexaploid wheat recently recorded from Western Georgia the U.S.S.R., revealed that it has 3 pairs satellited chromosomes. Two these resemble closely two present in timopheevi. The other pair is similar arm ratio to found monococcum var. hornemanni. Micro-satellites usually varieties did not occur zhukovskyi. 2. A maximum 4 quadrivalents per cell was at meiosis average being 1.35 cell. Pollen and seed fertility were normal. 3. In crosses between zhukovskyi spelta, macha vavilovi, only F1 plants cross with spelta survived. There an frequency 15.1 univalents zhukovskyispelta hybrid. Thus, partial failure chromosome pairing this hybrid hybrids timopheevi tetraploid species. 4. From discussion data, suggested might have arisen through doubling × If conclusion supported by future experiments, will be first genomic constitution than ABD.