II. 25. Normal x "uzu"-type crosses in Hungary.
A. Palagyi, Cereal Research Institute, H.6701, Szeged, 391 Hungary.
The basic problem of winter barley breeding in Hungary is the improvement of standing ability. One of the ways to solve this problem is to diminish plant height. Therefore, our varieties cultivated in 1971 and several other genotypes were crossed with an "uzu"-type Japanese barley, "Akashinriki". The characteristics of the "uzu" or "semi-brachytic" type spontaneous mutant are described in the reports of Takahashi (1983) and Tsuchiya (1980).
Promising new variety candidates were produced from the basic cross Mv-34 x Akashinriki among the crosses. Two segregates from the cross
[(Mv-34 x Akashinriki)F3 x (EMS-Mv-34 M4)] F10 (1983)
were studied in official small plot comparing trials. One of them is "uzu"-type, the other is more similar to the barleys in Central Europe (six-rowed) as regards its phenotype. Their yielding ability and winter hardiness is similar to the level of the domestic standard "Kompolti korai" but their standing ability and certain qualitative parameters, e.g. nutritive value are better.
This material is of especially great importance because, as it is well known, the "uzu"-type barleys are spying barleys.(1) Geographically they are spread only in middle and south Japan and on the South Korean Peninsula (Takahashi, 1982). As far as we know, "uzu"-mutants have not been used in Central Europe to improve winter barley.
(1) There are many varieties of winter type uzu too. (T. Tsuchiya).
References:
Takahashi. R. 1982. Geographical distribution. In Plant Genetics V:287-323.
(ed. by H. Kihara and K. Sakai), Shokabo, Tokyo, Japan.
Takahashi, R. 1983. Catalogue of barley germplasm preserved in Okayama University. Okayama Univ., Kurashiki, Japan, 144-160:IV. A summary of character differentiation.
Tsuchiya, T. 1980. BGN 10:108.