Root Screening of a Panel of Rice Accessions
- 1 Department of Biochemistry and Molecular Biology, University of Chittagong, Chittagong, Bangladesh
- 2 Department of Biochemistry and Molecular Biology, University of Chittagong, Chittagong, Bangladesh
- 3 Department of Biochemistry and Molecular Biology, University of Chittagong, Chittagong, Bangladesh
Abstract
Rice is considered one of the most important cereal crops for human nutrition. Based on current predictions of increasing global population, rice production will need to increase by more than 50% to meet the future demand of the rice eating countries. It has already been demonstrated that cereal crop yield could be increased by modifying root architectural traits for production under limited resources like water and nutrients. The current study was carried out to identify deep rooted cultivars of a panel from aus panel from IRRI and a panel consisting of Brazilian and Japanese cultivars by using the buried herbicide technique. Among the accessions of aus rice cultivars Narikel Jhupi, Panniti showed the highest herbicide score (HS), 11 cultivars showed the higher herbicide score than the Black Gora (more than 4 HS), 14 accessions showed the same herbicide score as deep rooted check varieties Black Gora, 11 cultivars showed very low herbicide score (less than 0.5) compared to other cultivars and 21 cultivars did not show any herbicide injury symptoms. Among the Brazilian and Japanese accessions IAC 202, Santa America (IAC), Vermelho de Pernambuco, Nourin 5, Urasan 1, Saitama Senshou, Ootama, and Chioda Wase showed the highest herbicide score (more than 4 HS) than the other cultivars. A total of 29 accessions showed very low herbicide score (below 1). Amon the all tested cultivars Araure 4, BRS Formoso, Centauro, Cimmaron, CT 9682, Eika Ine, FL00447, Fonaiap, IAC120, IR 8, IRGA 409, Iwate Ryoon 1, Koshihikari, Kurohige, Linea 17 and Nipponbare did not show any symptoms even at the last scoring day. Around 211 cultivars showed less than 3 herbicide score. Screening the root traits (mostly rooting depth), these traits are relevant to breeding of drought resistance in rice. These finding have the potential to be applicable in other field crops as well as rice.
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