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An evaluation of wheat mutant lines for rust resistance and other agronomic traits.
Author(s):
1. S. Anwar Shah: Nuclear Institute of Food & Agriculture (NIFA), Peshawar, Pakistan
2. T. Mohammad: Nuclear Institute of Food & Agriculture (NIFA), Peshawar, Pakistan
3. S. Hassan: Nuclear Institute of Food & Agriculture (NIFA), Peshawar, Pakistan
4. K. Rahman: Nuclear Institute of Food & Agriculture (NIFA), Peshawar, Pakistan
Abstract:
Mutation breeding with the objective to improving rust resistance in hexaploid wheat resulted in mutant lines resistant to stripe rust (Puccinia strliformis) and leaf rust (Puccinia recondita). Dry dormant seeds with 11-12 % moisture of the high yielding but rust susceptible cultivar Lu-26 were mutagenically treated with 250 Gy 60co gamma radiation and selected between the M2 and M4 generations for rust resistance under artificial epiphytotic conditions. Confirmed rust resistant or tolerant M4 mutant lines were first tested in a M6 microtrial and 19 promising mutant lines retested in a M trial for heading time, plant height and yield/ha in comparison with the parent cultivar and the rust resistant variety PAK-81. Improved rust resistance exerted in some mutant lines resulted in higher yields than the test cultivars, while heading dates were mostly delayed and four mutants had a significantly reduced plant height. Some of these mutants possess valuable agronomic traits and may either be used directly or as gene donors incrossbreeding for the development of improved wheal, cultivars in Pakistan.
Page(s): 298-300
DOI: DOI not available
Published: Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 30, Issue: 4, Year: 1987
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