A new barley cultivar 'HQ10' with extremely high beta-amylase activity and high quality cultivation characteristics
2017
Oozeki, M. | Sotome, T. | Sekiwa, T. | Yamaguchi, M. | Kato, T. | Ooyama, M. | Toyoshima, T. | Suzuki, Y. | Shirama, K. | Ishikawa, N. | Taniguchi, Y. | Oda, S. | Nagamine, T. | Kashima, N. | Ootuka, M. | Kodama, M. | Tunemi, J. | Watanabe, N. | Suzuki, E. | Haruyama, N. | Kawada, N. | Fukuda, E. | Sato, K. | Nakata, S. | Nozawa, S. | Kumekawa, N. | Oono, K. | Watanabe, H. | Okiyama, T. | Takayama, T. | Saito, T. | Usui, M.
We developed an extremely high beta-amylase activity and diastatic power two-rowed barley 'HQ10' from a cross of Kantou-nijo32 (Sukai Golden) /3/<Daikei HG32/2/<Daikei HC15/Yon R kei 1363> (Fsub(1)) > (Fsub(4)), which was released in September 2014. Malt diastatic power and beta-amylase in the grains of 'HQ10' were extremely high compared to leading cultivar such as 'Sachiho Golden', by approximately 2.5 times to 4 times. 'HQ10' is resistant to BaYMV strain types I to V (pyramided with resistance genes rym5 and rym3). The agronomic characters of 'HQ10' -grain yield, volume weight, 1000-grain weight, and plump grain- are low and inferior compared to the leading cultivar 'Sachiho Golden'. The malting quality of 'HQ10' is as follows: extremely high diastatic power, high in apparent final attenuation, low in malt extract, and high in water sensitivity. The pearling quality of 'HQ10' is as follows: very hard and long pearling time, low in peal whiteness, and high in broken grain. The overall malt quality and pearling quality of 'HQ10' are inferior to those of 'Sachiho Golden'. Furthermore, we revealed that the beta-amylase activity of 'HQ10' is improved with top dressing after heading or by using a slow release fertilizer.
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