Studies on Flowering Habits of Early Indica PTGMS Lines in Rice
Seven early indica rice photo-thermo-sensitive genic male sterile(PTGMS)lines were selected to analyze the characteristics of fertility alteration under different sowing dates in Taizhou,Zhejiang Province,and the related indexes of flowering habits were observed and measured.The results showed that seven male sterile lines had a lower critical sterility-inducing temperature with a longer safe period of fertility alteration sensitivity,so there was a wider range for the selection of seed production time.With a short and concentrated flowering period,a concentrated flowering time,a relatively high total stigma exsertion rate and a long glume-opened duration,Xiangling 628S can be used as an ideal parent for local two-line hybrid rice seed production and has a good application prospect.
early indica ricePTGMS lineflowering habitstigma exsertion ratehybrid seed production
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