Vol. 8, Issue 3 (2020)
Study of anther dehiscence, pollen viability and stigma receptivity in rice (Oryza sativa L.)
Author(s): BS Thorat, RL Kunkerkar, SR Kadam, SG Bhave and JP Devmore
Abstract: A present study was carried on floral biology of rice that cover anther dehiscence, pollen viability and stigma receptivity was carried out with the aim to improve the efficiency of hybridisation in rice breeding work at the Experimental farm of Regional Agriculture Research Station, Karjat (Raigad) during kharif 2016. In this study, three CMS lines viz., IR58025A, RTN 12A and RTN17A and four testers i.e., Chedo Local, CR-2829-PLN-36, NPQ-49 and RP-5898-19-8-6-1-1-1 of rice were used. The results reported that the time required for dehiscence of anther ranged from 8 - 20 minutes in testers of rice. The results showed that time of anthesis in both the CMS lines and testers of rice since 08.00 AM. In the pollen viability study, results suggested that pollens are more viable from single minute to 11 minutes after anther dehisced at fully blooming stage. The range of pollen viability percentage was observed from 90.79% to 94.92%. However, there are variations among the genotypes for the optimum viability of pollen at maximum blooming stage. In both CMS lines and testers of rice, maximum blooming stage of panicles was recorded 9.00 am to 1.00 pm while 8.00-11.00 days took for fully completion of anthesis. In CMS lines of rice, receptivity of stigma ranged from 36 to 42 hrs (two to three days). There was no difference in stigma receptivity stages among the three CMS lines of rice. Thus, the precise knowledge of floral biology, which includes structural and functional aspects of rice inflorescence, is essential for breeders to plan and execute breeding strategies.
DOI: 10.22271/chemi.2020.v8.i3am.9616
Pages: 2677-2680 | 1328 Views 637 Downloads
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How to cite this article:
BS Thorat, RL Kunkerkar, SR Kadam, SG Bhave, JP Devmore. Study of anther dehiscence, pollen viability and stigma receptivity in rice (Oryza sativa L.). Int J Chem Stud 2020;8(3):2677-2680. DOI: 10.22271/chemi.2020.v8.i3am.9616