Seed dormancy in germplasm collection of rice (Oryza sativa) insensitive to photoperiod


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Authors

  • U C KALITA
  • D K BARUAH
  • L P UPADHAYA

Abstract

Field evaluation of 212 photoperiod-insensitive germplasm collection of rice (Oryza saliva L.) during autumn seasons of 1990 and 1991 revealed that 155 collections had no seed dormancy. The seed dormancy in 57 collections ranged from 7 to 30 days. 'Cheni Abu' showed the highest dormancy period (30 days), followed by 'As 326', 'Goalbhog', 'Banglami' and 'Bala'. In 21 indigenous Collections it was observed both under field and laboratory conditions. 'Cheni Ahu', 'Goalbhog' 'Nilajee', 'Banglami', 'As 229', 'As 93-1'. 'Guni Ahu'. 'Rongadoria 4'. 'Basmati Culture' and 'Podumani Ahu' were identified promising
donors for seed domancy. Correlation study showed significant positive correlation with plant heightand lodging score. Field as well as laboratory methods were found neCessary for identification of dormant rice germplasm collections. Seed dormancy of the indigenous germplasm collections appears to be an adaptive mechanism for their survival in the hot, humid rainy season.

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Author Biographies

  • U C KALITA
    Assistant Rice Breeder, Regional Agricultural Research Station, Assam Agricultural University. Titabar 785 630
  • D K BARUAH
    Rice Breeder, Regional Agricultural Research Station, Assam Agricultural University. Titabar 785 630
  • L P UPADHAYA
    Professor, Department of Plant Breeding and Genetics, AAU, Jorhat 785 013, Regional Agricultural Research Station, Assam Agricultural University. Titabar 785 630

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Issue

Vol. 64 No. 3 (1994)

Section

Articles

License

The copyright of the articles published in The Indian Journal of Agricultural Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.

How to Cite

KALITA, U. C., BARUAH, D. K., & UPADHAYA, L. P. (2013). Seed dormancy in germplasm collection of rice (Oryza sativa) insensitive to photoperiod. The Indian Journal of Agricultural Sciences, 64(3). https://epubs.icar.org.in/index.php/IJAgS/article/view/29076