Abstract
Inheritance of disarticulation in progenies of hybrids among Tibetan weedrace (9053 and AS907 of Triticum aestivum var. tibetanum), Yunnan hulled wheat (AS338 of T. aestivum concv. yunnanense) and spelt wheat (AS326 of T. aestivum concv. spelta) was studied. Disarticulation type is governed by some disarticulation modifying genes. These modifying genes can be divided into two groups, that is, wedge modifying genes (Wm) and barrel modifying genes (Bm). The two kinds of genes are codominant. Wedge type disarticulation is governed by the complement of at least two dominant wedge modifying genes (Wm 1 and Wm 2, Wm 3 and Wm 4, or Wm 5 and Wm 6). Barrel type disarticulation is controlled by at least one dominant barrel modifying gene (Bm 1, Bm 2 or Bm 3) and its expression can be inhibited in certain genetic backgrounds. As to the background inhibition that dominant barrel modifying genes cannot express in some homozygous brittle rachis wheat, the hypothesis of epistasy of many homozygous alleles was suggested.
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References
Cao W.G., Scoles G.J. and Hucl P. 1997. The genetic of rachis fragility and glume tenacity in semi-wild wheat. Euphytica 94: 119–124.
Chen Q.F., Yen C. and Yang J.L. 1998. Chromosome location of the gene for brittle rachis in the Tibetan weedrace of common wheat. Genet. Resour. Crop Evol. 45(5): 407–410.
Dong Y.S., Zheng D.S., Qiao D.Y., Zeng X.Q., En Z.C. and Chen X.R. 1981. Investigation and study on Yunnan wheat (Triticum aestivum ssp. yunnanense King). Acta Agronomica Sinica 7(3): 145–151.
Kerber E.R. and Rowland G. 1972. New cytogenetic evidence on the origin of free-threshing character in hexaploid wheat. Canad. J. Genet. Cytol. 14: 730–731.
Kihara H. 1944. Discovery of the DD-analyser, one of the ancestors of Triticum vulgare, Agric. Hortic. 19: 889–890
Kihara H. and Lilienfeld F. 1949. A new synthesized 6X-wheat. proc. 8th Intern. Congr. Genet., Hereditas, suppl. vol., pp. 307–319.
Kihara H., Okamoto M., Ikegami M., Tabush J., Suemoto H. and Yamane Y. 1950. Morphology and fertility of five new synthesized hexaploid wheats. Seiken Ziho 4: 127–140.
Mac Key J. 1966. Species relationship in Triticum. proc. 2nd Intern. Wheat Genet. Symp., Lund, Sweden, Hereditas (Suppl.) 2: 237–276.
McFadden E.S. and Sears E.R. 1946. The origin of Triticum spelta and its free-threshing hexaploid relatives, J. Hered. 37: 81–90.
McIntosh R.A. and Cusick J.E. 1987. Linkage map of hexaploid wheat. In: Heyne E.G. (Ed), Wheat and Wheat Improvement - Agronomy Monograph No. 13, Second Edition. Wisconsin, USA, ASA-CSSA-SSSA, 289–297.
Morrison L.A. 1994. Reinterpretation of dispersal strategies in Triticum L. and Aegilops L., In: Wang R.R.-C., Jensen K.B. and Janussi C. (Eds), proc. 2nd Intern. Triticeae Symp. Logan, Utah, USA, June 20-24, 1994. pp 203–206.
Shao, Q.Q., Li C.S. and Basang C.R. 1980. Semi-wild wheat from Xizang (Tibet). Acta Genetica Sinica 7(2): 150–156.
Tsunewaki K., Yamada S. and Mori N. 1990. Genetical studies on a Tibetan semi-wild wheat, Triticum aestivum ssp. tibetanum. Jpn. J. Genet. 65: 353–365.
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Chen, QF. Inheritance of disarticulation derived from some hexaploid brittle rachis wheat. Genetic Resources and Crop Evolution 48, 21–26 (2001). https://doi.org/10.1023/A:1011291914213
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DOI: https://doi.org/10.1023/A:1011291914213