Abstract
Barley (Hordeum vulgare L.) haploid can be obtained from interspecific hybridization between H. vulgare and H. bulbosum followed by the selective elimination of H. bulbosum chromosomes. The objective of this study was to evaluate the agronomic performance and malting quality of doubled haploid barley lines developed by the bulbosum method. F1 plants derived from two cross combinations of barley cultivars were crossed with a st.rain of H. bulbosum, and their haploid hybrids were treated by 0.05(colchicine solution to produce the doubled haploids. As the results, 209 doubled haploid plants were obtained from 2 F1's (DH1, DH2) by the bulbosum method. Ranges for grain yield, 1000 grain weight and plump grain percentage of 143 Iines tested in 1988 were 22.8∼46.2 kg/a, 41.2∼50.6g, 65.0∼96.6% (DH1) and 25.6∼53.2kg/a 44.0∼54.8g, 75.5∼96.4% (DH2), respectively (Fig. 2), and 56 Iines were selected. Ranges for grain yield, 1000 grain weight, plump grain percentage and malting quality of the 56 Iines tested in 1989 were 35.2∼50..5kg/a, 44.0∼50.9g, 65.0∼95.7%, -14.2∼15.7 (DH1) and 39.6∼57.5kg/a, 43.9∼51.5 g, 70.8∼93.4%, -7.5∼13.3 (DH2), respectively (Fig. 3).
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