Advances in rice genetics by D S Brar; B Hardy

By D S Brar; B Hardy

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Yield (t ha–1) of japonica-indica hybrid THR1. 1 (100) Ikehashi H, Araki H. 1986. Genetics of F1 sterility in remote crosses of rice. Proceedings of the International Rice Genetics Symposium. Los Baños (Philippines): International Rice Research Institute. p 119-130. Kabaki N, Hasegawa H, Yamaguchi H, Kon T. 1992. Growth and yield of japonica-indica hybrid rice. Bull. Hokuriku Natl. Agric. Exp. Stn. 34:111-139. Maruyama K. 1989. Hybrid rice breeding. Nogyo Gijutsu 44:183188. ) Shinjo C. 1975. Genetic studies of cytoplasmic male sterility and fertility restoration in rice.

Naina Mohammed, R. M. Vijayakumar Crosses were made between two TGMS lines, ID24 × SM5 and IC10 × JPs4. The F1s had completely normal pollen and spikelet fertility under high temperature (35 °C day/26 °C night). The F2s showed a 9 fertile:7 sterile ratio, indicating that the character is governed by two separate genes. Pollen sterility in the F2 ranged from completely sterile to 27% sterility, indicating the effect of modifier genes under high-temperature regimes (during April 1998 at Tiruchirapalli, India).

A method to make decisions jointly on a number of dependent characters. Indian J. Genet. 44(3):419-424. S. A. A. D. Redoña Heterosis in rice has been acknowledged to be associated with the genetic divergence of the parents used in hybridization. We investigated the nature and extent of the correlation between microsatellite marker heterozygosity and heterosis for some quantitative traits in 48 three-line and 13 two-line F1 rice hybrids. The parental lines used represented the breadth of genetic diversity in the Philippine hybrid rice gene pool.

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