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The University of the Philippines (UP) is the country’s national university. This premier institution of higher learning was established in 1908 and is now a university system composed of eight constituent universities and one autonomous college spread throughout 17 campuses in the archipelago.

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Journal Article

Journal Article

Neck blast-resistant lines of Radha-17 isolated  [1994]

Chaudhary, B.; Rampur, P.B.; Lal, K.K. (National Maize Research Program, Rampur (Nepal). Agricultural Research Station);

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Rice blast (Bl), caused by Pyricularia oryzae Cav., is one of the most serious rice diseases in Nepal. Blast can reduce yields by 50 percent in areas where Masuli, Nepal's most popular variety, is grown. Masuli and Mallika were crossed to develop Radha-17, which has a yield potential of 4 t/ha and resists leaf Bl. Radha-17 was reported to be susceptible to neck Bl, another serious disease. One hundred disease-free panicles of Radha-17 grown in farmers' field trials were selected in 1990. Seeds from these panicles were sown at 10-cm spacing in 1-m rows in 1991. The trial plot was surrounded by two rows of a Bl-susceptible variety and by four rows of Sesbania aculeata, which were planted 2 and 4 wk before Radha-17, respectively. The seedbed was inoculated uniformly with 1-yr-old Bl-infected rice leaf debris. Only 60 of the 100 lines were selected as resistant in 1991. Seeds from these lines were sown in 1992 in single rows with Bl-susceptible variety Masuli in alternate rows at 10-cm spacing. All other activities were the same as in 1991. While Masuli was severely affected by leaf Bl at the seedling stage, leaf Bl scores in all test lines were less than three on the standard evaluation system for rice (SES) scale. Results suggest that line Radha-17 is not pure with respect to Bl resistance. Selection within population of similar lines might yield Bl-resistant materials
From the journal
International Rice Research Notes (Philippines)
ISSN : 0115-0944

Bibliographic information

Language:
English
Type:
Summary
In AGRIS since:
1995
Volume:
19
Issue:
1
Start Page:
11
All titles:
"Neck blast-resistant lines of Radha-17 isolated"@eng
Other:
"Summary only"
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Bibliographic information

Language:
English
Type:
Summary
In AGRIS since:
1995
Volume:
19
Issue:
1
Start Page:
11
All titles:
"Neck blast-resistant lines of Radha-17 isolated"@eng
Other:
"Summary only"