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- Title
II.2 GENETIC BEHAVIOR OF BROWN SPOT DISEASE IN SOME RICE GENOTYPES.
- Authors
ABO YOUSSEF, M. I.; SULTAN, M. S.; ABDEL-MONEAM, M. A.; EL-SHENAWY, M. M.
- Abstract
The present study was carried out at the Experimental Farm of Sakha Agric. Res. Stn., Kafrelsheikh, Egypt, during 2010, 2011 and 2012 seasons. Three cytoplasmic male sterile lines, [two wild abortive type (WA); IR69625A, IR70368A and one K-type (K17A)] were tested with seven testers. These particular lines were chosen to study the heterosis and combining ability effects of three CMS lines and five Egyptian testers (Giza 178, Giza 179, Giza 181, Giza 182 and Sakha 105), one promising line (GZ 6296-12-1-2-1-1) and introduced cultivar (HR195R). The parental cultivars and resulting 21 crosses were evaluated in a randomized complete block design (RCBD) experiment with three replications. Results indicated that parental lines Giza178R, Giza179R, HR195R, Giza 181R and Giza 182R could be utilized either for producing new hybrid combinations or for developing new parental lines in breeding program for brown spot disease resistance. Also, the results indicated that the female line K17A was found to be a good combiner to brown spot disease resistance. Evaluation of hybrids for heterosis and combining ability effects indicated that out of 21 hybrid rice combinations, only four, namely; IR69625A x Giza178R, IR69625A x Giza179R, IR(i9625A x Giza181R and Kl7A x HR195R recorded significantly positive values and were most promising for most desirable traits, especially brown spot disease and could be utilized in breeding programs for developing commercial rice hybrids.
- Subjects
RICE brown spot disease; RICE genetics; RICE breeding
- Publication
Egyptian Journal of Agricultural Research, 2015, Vol 93, Issue 2(A), p157
- ISSN
1110-6336
- Publication type
Article