Association of leaf rust and powdery mildew resistance in a recombinant derived from a Hordeum vulgare × Hordeum bulbosum hybrid

Plant Breeding - Tập 117 Số 1 - Trang 83-84 - 1998
R. A. Pickering1, B. J. Steeffenson2, A. M. Hill1, I. G. Borovkova2
1New Zealand Institute for Crop & Food Research Limited, Private Bag 4704, Christchurch, New Zealand
2Department of Plant Pathology, North Dakota State University, Fargo, ND 58105-5012, USA

Tóm tắt

AbstractWhile studying powdery mildew resistance in a recombinant line (code 81882) derived from a Hordeum vulgare (cv. ‘Vada’) ×Hordeum bulbosum hybrid, a low infection type of resistance to leaf rust was observed. To determine the mode of inheritance of the leaf rust resistance and whether there was linkage between the two resistances, F2 and F3 progenies from crosses between 81882 and ‘Vada’ were inoculated with the leaf rust and powdery mildew pathogens. Southern blots were prepared using restricted DNA extracted from leaves of 82 F2 plants and four chromosome 2HS sequences were hybridized with the blots to define the length of the introgression. The leaf rust resistance appears to be inherited as a single dominant gene on chromosome 2HS, which co‐segregates with the powdery mildew resistance. There was an almost complete association between the resistances and the respective molecular markers, but it is likely that the strong linkage results from the frequent inheritance of the introgressed H. bulbosum DNA as an intact segment of chromatin with only low levels of recombination within the segment.

Từ khóa


Tài liệu tham khảo

Fischbeck G., 1991, Integrated Control of Cereal Mildews: Virulence Patterns and their Change, 247

Franckowiak J., 1997, BGS351, Glossy sheath gshl., Barley Genet. Newsl., 26, 292

Kasha K. J., 1996, Proc. VIIth Int. Barley Genet. Symp., 338

Levine M. N., 1952, Studies on Dwarf Leaf Rust of Barley. US Dept Agric. Tech. Bull. no. 1056

Moseman J. G., 1968, Reactions of barley to Erysiphe graminis, f. sp. hordei from North America, England. Ireland and Japan, Plant Dis. Rep., 52, 463

10.1007/BF00043161

10.1007/BF00220943

10.1139/g96-049

Schondelmaier J., 1993, Linkage studies between morphological and RFLP markers in the barley genome, Barley Genet. Newsl., 22, 57

10.1111/j.1439-0523.1995.tb00758.x

10.1139/g93-069

10.1007/BF00227383

10.1007/BF00305828

Thông tin
Thông tin xuất bản

Plant Breeding

Tập 117 Số 1

83-84

Thông tin tác giả