Variability for Freezing Tolerance among 42 Ecotypes of Green-Type Annual Bluegrass
Variability for Freezing Tolerance among 42 Ecotypes of Green-Type Annual Bluegrass
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DOI：
10.2135/cropsci2008.12.0712
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发表时间：
2010-01-01
期刊：
影响因子：
2.3
通讯作者：
Castonguay, Yves
中科院分区：
文献类型：
--
作者：
Dionne, Julie;Rochefort, Sophie;Castonguay, Yves
有限的信息存在的程度上的遗传变异的耐寒性多年生生物型的一年生早熟禾（早熟禾L。）在高尔夫果岭管理下发展起来的。我们在美国和魁北克收集了42种生态型的耐冻性，这些生态型在秋季和冬季使用在低温下硬化的植物。随后，我们分析了冷诱导的生化变化，在一个子集的生态型与不同水平的耐受性。不同生态类型之间的耐寒性差异很大，表现为50%植物的致死温度（LT 50），其值范围为
Limited information exists on the extent of genetic variability for freezing tolerance among perennial biotypes of annual bluegrass (Poa annua L.) that evolved under golf greens management. We characterized the freezing tolerance of 42 ecotypes collected across the United States and in Quebec using plants hardened to low temperatures during fall and winter. We subsequently analyzed cold-induced biochemical changes in a subset of ecotypes with varied levels of tolerance. There was a large variability among ecotypes for freezing tolerance expressed as the lethal temperature for 50% of the plants (LT50) with values ranging from