Producing stable androclonal variants with improved agronomic traits in indica rice
2003
Desamero, N.V. | Diaz, C.L. | Dimaano, Y.A. | Chico, M.V. | Macabale, S.S. | Domingo, L.G. | Corpuz, E.R. | Padolina, T.F. | Tabien, R.E. | Niones, J.M. | Amar, G.B. | Rapusas, H.R. | Romero, M.V. | Bonilla, P.S.
The major application of anther culture (AC) technology as a tool in rice breeding is to accelerate the production of stable, homozygous breeding lines from genetically diverse, heterozygous genotypes. The technology also offers the possibility of introducing into plants variability that can be used for crop improvement. Such induced variability is achieved through androclonal variation. Through AC, stable androclonal variants with improved agronomic traits were produced from a traditional rice variety, Wagwag, and a modern indica rice variety, IR64. Wagwag is photoperiod-sensitive, very tall, and late-maturing. From AC-derived doubled-haploid plants, photoperiod-insensitive, semidwarf, early-maturing, high-yielding, bacterial-leaf-blight-resistant, and salinity-tolerant (moderate) Wagwag breeding lines with good grain quality were developed. Likewise, improved breeding lines, which matured earlier and yielded better than the original IR64, and were resistant to tungro, were produced from AC-derived IR64 variants. DNA fingerprinting with RAPD and microsatellite markers differentiated the AC-derived Wagwag and IR64 breeding lines from the seed-derived Wagwag and IR64, respectively. Furthermore, the resulting cluster analyses genetically separated individual AC-derived breeding lines.
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