海南北部普通野生稻育性相关性状调查与分析

调查和分析了海南北部普通野生稻40个居群的柱头颜色、柱头外露率、花粉育性、自交结实率和自然结实率。结果发现,海南北部普通野生稻柱头颜色分为褐色、紫色、白色、紫白双色、褐白双色5类。柱头总外露率均在60%以上,平均总外露率82.4%,其中有28个居群总外露率在80%以上,最高总外露率达96.7%。花粉可育率平均为25.6%,可育率在40%以上的居群占总居群的22.5%,可育率最高达91.4%。自然结实率在3.0%~53.1%之间;自交结实率在0~46.8%之间,有4个居群的花粉可育率和自交结实率均为0;自然结实率最高的单株达98.6%。这些结果对海南野生稻进一步研究和利用提供了重要依据。

Investigation and Analysis of Fertility Characteristics of Oryza rufipogon Griff . in North Part of Hainan Province

Color of stigma, percentage of stigma exsertion, pollen fertility, and seed setting rate by self-pollination and under natural conditions were investigated for 40 natural populations of Oryza. rufipogon Griff . collected from north part of Hainan Province . The results showed that there were several kinds of stigma color named brown,purple,white, mixed color of purple and white, mixed color of brown and white. Percentage of stigma exsertion exceed 60%,among which 28 natural populations come up to 80%,and highest percentage of stigma exsertion was 96.7%,. Average percentage of pollen fertility was 25.6%,and over 40% populations accounting for 22.5%.and highest pollen fertility was 91.4%.Seed setting rate under natural conditions was 3.0-53.1% , and seed setting rate of self-pollination was 0-46.8%,.4 natural populations were barrenness.Highest rate of seed setting under natural conditions reached 98.6.The findings may provide reference for further study and breeding utilization of Oryza rufipogon Griff. indigenous to Hainan.