optimization of field evaluation of resistance of sugar beet cultivars to cercospora leaf spot
نویسندگان
چکیده
to optimize the field evaluation of resistance to cercospora leaf spot, 12 sugar beet cultivars were evaluated under field conditions in gharakhil, ghaemshahr at 15-days intervals. measurements were carried out based on kws 1-9 and agronomia 1-5 scales. disease severities were graded based on total plants per plot and also based on means of 5 randomly selected plants in each plot. analysis of each recording date and also multivariate analysis of variance based on lambda statistics indicated that measurements at each stage are not reliable for resistance evaluation and infection severity should be recorded during the growing season. so genotypes comparison should be done based on the disease trend during the season. also, it seems that plot grading is as accurate method for measurement of infection as single plant grading. therefore, it can be used to facilitate the evaluation of resistance.
منابع مشابه
evaluation of commercial sugar beet cultivars for resistance to cercospora leaf spot under field condition
resistance of 16 sugar beet cultivars to cercospora leaf spot was evaluated in ghaemshahr region. the experiment was conducted in a complete block design with 6 replications, and, disease severity of cultivars was measured two times. root yield of cultivars, as well as their disease severity, was compared with each other under natural cercospora infection in dezful area (winter crop). in dezful...
متن کاملevaluation of commercial sugar beet cultivars for resistance to cercospora leaf spot under field condition
resistance of 16 sugar beet cultivars to cercospora leaf spot was evaluated in ghaemshahr region. the experiment was conducted in a complete block design with six replications and disease severity of cultivars was measured two times. as a winter crop the root yield of cultivars and their disease severity compared under natural cercospora infection in dezfoul area in a complete block design with...
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Cercospora leaf spot (CLS) is one of the most serious leaf diseases for sugar beet (Beta vulgaris L.) worldwide. The breeding of sugar beet cultivars with both high CLS resistance and high yield is a major challenge for breeders. In this study, we report the nuclear magnetic resonance (NMR)-based metabolic profiling of field-grown leaves for a subset of sugar beet genotypes harbouring different...
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عنوان ژورنال:
چغندرقندجلد ۱۸، شماره ۱، صفحات ۸۱-۹۱
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