국산밀에서 농업형질 및 종실 형태가 수발아에 미치는 영향 (Effects of Agronomic Characteristics and Grain Morphology on Pre-harvest Sprouting in Korean Wheat Cultivar)

서지정보

· 발행기관 : 한국육종학회
· 수록지 정보 : 한국육종학회지 / 45권 / 4호 / 346 ~ 357페이지
· 저자명 : 신상현, 박철수, 강천식, 박종철, 현종내

초록

Pre-harvest sprouting (PHS), which is the precocious germination of the grains in the spike before it is harvest, is the serious problem in the reduction of end-use quality in wheat. In this study, the relationships among PHS tolerance, agronomic and grain characteristics in Korean wheat cultivars were evaluated for two years to improve PHS tolerance in Korean wheat breeding programs. Grain characteristics including 1,000 grain weight and grain size (length, width and thickness), PHS tolerance conducted by the mist spray in the humid chamber (PHS-MS) and germination index (GI), and Agronomic traits including heading date, maturing date, culm length, awn length and the number of grain/spike, were significantly influence by genotype,year and the interaction between year and genotype, except in spike length, the number of spike/m 2and test weight. PHS tolerance and GI were significantly correlated with 1,000-grain weight (r = 0.618, and r = 0.528, respectively) and length, width and thickness of grain, although no significant relationship between agronomic traits and PHS tolerance was found in Korean wheat cultivars. PHS-MS also showed positively correlated with GI value (r = 0.770, P < 0.001). White grain cultivars showed higher PHS-MS and GI values (61.86% and 0.58, respectively) than red grain cultivars (11.89% and 0.18, respectively). White grain cultivars also showed higher values in length, width and thickness of grain than red grain cultivars. Among red grain cultivars, Alchan, Goso, Suan and Sukang showed lower values in both PHS-MS and GI (< 2.63% and < 0.05, respectively)and these cultivars could be used to improve PHS tolerance in Korean wheat breeding programs.

영어초록

Pre-harvest sprouting (PHS), which is the precocious germination of the grains in the spike before it is harvest, is the serious problem in the reduction of end-use quality in wheat. In this study, the relationships among PHS tolerance, agronomic and grain characteristics in Korean wheat cultivars were evaluated for two years to improve PHS tolerance in Korean wheat breeding programs. Grain characteristics including 1,000 grain weight and grain size (length, width and thickness), PHS tolerance conducted by the mist spray in the humid chamber (PHS-MS) and germination index (GI), and Agronomic traits including heading date, maturing date, culm length, awn length and the number of grain/spike, were significantly influence by genotype,year and the interaction between year and genotype, except in spike length, the number of spike/m 2and test weight. PHS tolerance and GI were significantly correlated with 1,000-grain weight (r = 0.618, and r = 0.528, respectively) and length, width and thickness of grain, although no significant relationship between agronomic traits and PHS tolerance was found in Korean wheat cultivars. PHS-MS also showed positively correlated with GI value (r = 0.770, P < 0.001). White grain cultivars showed higher PHS-MS and GI values (61.86% and 0.58, respectively) than red grain cultivars (11.89% and 0.18, respectively). White grain cultivars also showed higher values in length, width and thickness of grain than red grain cultivars. Among red grain cultivars, Alchan, Goso, Suan and Sukang showed lower values in both PHS-MS and GI (< 2.63% and < 0.05, respectively)and these cultivars could be used to improve PHS tolerance in Korean wheat breeding programs.

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