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TNAU Agritech Portal :: Crop Improvement

Background and Aims: High temperatures over 32-36°C at anthesis induce spikelet sterility in rice

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Irrigation water management in paddy | agropedia

In rice anthesis commences shortly after emergence of panicle. Spikelets at the tip bloom first and proceed downwards. Anthesis time 8-10 am. Each spikelet remain open 30 minutes and then closes. The anther dehiscence takes place immediately after the opening of the spikelets. Receptivity remains for one day.

Paddy crop is strongly influenced by water supply

Jagadish SVK, Muthurajan R, Oane R et al. (2010) Physiological and proteomic approach to address heat tolerance during anthesis in rice (Oryza sativa L.). Journal of Experimental Botany 61: 143–156.

The Regional Institute - Publications

EMASCULATION AND POLLINATION TECHNIQUES IN CEREALS. 1. RICE (Oryza sativa) (2 n = 24) (Family – Poaceae) In rice anthesis commences shortly after emergence of panicle.

Emasculation is necessarily followed by controlled pollination. Emasculation is done during early morning between 6 and 8 AM in spikelets, due to open on the same day. Emasculation should be over well ahead of the time of anthesis. Crossing techniques in rice differ based on the method of emasculation. Since maximum number of spikelets open on the 3rd or 4th day of anthesis, panicles of that stage are selected for emasculation. The following methods are widely used for hybridization in rice.

Four rice cultivars (Liangyou 108, Huaidao 6, Nanjing 43, Nanjing 44) were cultivated in Nanjing under the same management of Jiangsu area, and were sampled from weeks 1 to 5 after anthesis and at harvest in 2008, 2009 and 2010.

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