Heterosis and heterobeltiosis in F1 of rice varieties in relation to yellow orange leaf virus resistance
1990
Boonhong Chongkid | Praphas Weerapat | Chairerg Maneepong (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Agronomy)
Eight rice varieties, ARC11554, GS10719, Suphan Buri 60 (SPR60), RD9, RD1, RD23, RD7 and TN1 were evaluated for reaction to the yellow orange leaf virus infection based on differences in percent leaf yellowing, plant height, number of panicle bearing tillers, and grain yield per plant. ARC11554 and GS10719 are classified as resistant or tolerant, SPR60 and RD9 as moderately resistant or tolerant, RD1 and RD23 as moderately susceptible, and RD7 and TN1 as susceptible. Heterosis and heterobeltiosis for each character were evaluated in the F1 plants from the 28 crosses obtained from the diallel crossing among the 8 parents. Significant heterosis and heterobeltiosis were observed in 13 and 2 crosses, respectively, for percent leaf yellowing; in 21 and 9 crosses, respectively, for plant height; in 27 and 15 crosses, respectively, for number of panicle bearing tillers; and in 23 and 11 crosses, respectively, for grain yield per plant.
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This bibliographic record has been provided by Thai National AGRIS Centre, Kasetsart University
