Growth and the out-crossing characteristics of high quality Indica rice male sterile lines T55A and T80A
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摘要: 对优良水稻不育系 T55A、T80A 的生育特性和异交特性的研究表明:①T55A、T80A 的播抽历期及主茎叶片数与有效积温(>10℃)存在极显著相关,感温性较强。②T55A 花时较早,午前花率高,且开花集中;T80A花时比 T55A 早,但不集中,且午前花率较低。③T55A、T80A 柱头活力强,开花后5 d 仍有很强活力,但异交结实率受环境影响大。Abstract: The growth and out-crossing characteristics of high quality rice male sterile lines T55A and T80A were studied.The results showed that days from sowing to heading and numbers of main stem leaves of T55A and T80A were significantly correlative to effective accumulated temperature(10C),it indicated that both T55A and T80A were developmentally temperature-sensitive.T55A had the characteristics of early flowering,high percentage of spikelet opening before noon and concentrated flowering;while T80A was spikelet opening earlier than T55A,but not concentrated flowering,and the percentage of spikelet flowering before noon was low.Both T55A and T80A had strong stigma vigor,but their seed-setting by out-crossing was much variant under different environments.
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Key words:
- Rice /
- Sterile line /
- Growth characteristics /
- Out-crossing characteristics
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