【摘要】 突变体Ｆａｎ５苗色低温敏感性状的遗传分析董彦君，董文其，张小明，石守鋆，张宏德（浙江省农业科学院作物研究所，杭州３１００２１）关键词：遗传分析，低温敏感；苗色ＧｅｎｅｔｉｃＡｎａｌｙｓｉｓｏｆＬｏｗ－ｔｅｍｐｅｒａｔｕｒｅ－ｓｅｎｓｉｔｉｖｅＳｅｅｄ...更多还原

【Abstract】 A low-temperature -sensitive seedling -colour mutaut Fan 5 was discovered in the field from breeding family in 1990 in Hangzhou. The experiment carried out under condition of artificially controlled five kinds of temperature (20℃, 23. 1℃, 26. 1℃, 28℃, 30. 1℃ ) showed that the seedling-colour of Fan 5 was white at lower temperature(<20℃ ), yellowish white at 23. 1℃, yellowish green at 26. 1℃, but was normal (green) at higher temperature (>28℃ ) and that its critical temperature was about 26. 1 ℃ for seedling-colour alteration in ten days after sowing. The results of segregation ratios of green seedling to white seedling from F1,F2 and BC1 populations at 20℃ indicated that a recessive nuclear gene controlled low-temperature -sensitive seedling-colour character in the mutant, which would be used as reasonable morphological indicator character for purifing dual-purpose male-sterile line and its hybrids.更多还原