Transient albino and revertible to green (TARGreen) rice mutant: simple, affordable and beneficial novel tag for rapid g
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Transient albino and revertible to green (TARGreen) rice mutant: simple, affordable and beneficial novel tag for rapid genetic purity testing in rice (Oryza sativa L.) Ramalingam Thangapandian . Narayanan Manikanda Boopathi Arumugam Yuvaraja
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Received: 31 March 2020 / Accepted: 23 July 2020 Ó Springer Nature B.V. 2020
Abstract A key problem that long remains challenging in rice ecosystem restoration is how to ensure quality seeds to re-establish rice varietal specific communities. Despite the available approaches such as use of seeds from authenticated sources, it is invariably argued that such seeds may harbour little genetic variability. In this study, a simple, affordable and alternative strategy is proposed: use of mutant line transient albino and revertible to green (TARGreen) derived from Oryza sativa var. ASD16. Rice line ASD16 is considered as a mega-variety in South India and it has shown rich harvest since its release in varying environments. However, the chief problem faced by the farmers is identification of genetically pure ASD16 plants in the field since it is often mixed with seeds from other rice-lines. To circumvent this problem, a chemical induced mutagenesis study was conducted in ASD16, which lead to the identification
of TARGreen. After germination, TARGreen remains albino for 21 days and after that, they gradually turn into green leaves. Further studies on this line over several generations established that TARGreen trait was a Mendelian single recessive gene and the plants can able to produce the same quantity and quality of seeds as that of ASD16. Besides discussing immediate applications of TARGreen in seed industry, its proposed applications in hybrid seed production and identification of TARGreen specific markers for its efficient introgression into other rice mega-varieties is also outlined hereunder. Keywords Rice Genetic admixtures Mutagenesis Green-revertible Albino and Mendelian inheritance
Introduction R. Thangapandian Rice Research Station, Tamil Nadu Agricultural University (TNAU), Ambasamudram, Tirunelveli District, Tamil Nadu627 401, India N. Manikanda Boopathi (&) Department of Plant Biotechnology, CPMB&B, TNAU, Coimbatore 3, India e-mail: [email protected]; [email protected] A. Yuvaraja Department of Plant Breeding and Genetics, Agricultural College and Research Institute, TNAU, Madurai, India
Rice (Oryza sativa L.) is the source of more than 500 calories per person per day for over 3 billion people (Chivenge et al. 2020). In India alone, rice is cultivated on more than 44.6 million ha with an average productivity of 3.76 t/ha with the recorded attainable yields of 10 t/ha. This reveals an exploitable yield gap of nearly 6 t/ha. Though several management strategies were proposed to minimize the yield gap, still there is a scope for improving the yield (Muralidharan et al. 2019). Early identification genetically pure rice
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Genet Resour Crop Evol
varieties will greatly help to remove the
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