Document Type : Original Article
Authors
1
Plant Protection Department, Desert Research Center, Cairo, Egypt.
2
Genetic Resources Department, Desert Research Center, Cairo, Egypt.
Abstract
Screening of fifteen sugar beet genotypes, obtained from research program funded from Desert Research Center, entitled St. Catherine's Breeding and Conservation Program for Plants with Special Environmental Needs, was carried out to estimate their susceptibility towards infection with root-knot nematode (RKN) Meloidogyne incognita. The response of these inbreed lines was varied between moderate susceptible (MS) and highly susceptible (HS) based on egg masses (E.M) index, also egg production was a dependable factor. One genotypes called SKG58-642 was found to be moderate susceptible (MS) as they possessed 25 egg mass. Seven genotypes viz., SKG73-311, SKH44-412, SKH44-452, SKC59-422, SKH44-422, SKT48-411 and SKH44-462 (possessed 43.3, 57.3, 63, 73, 74.3, 83.3 and 86.3 egg masses, respectively) were found to be moderately susceptible. The rest seven genotypes were highly susceptible; SKH44-482, SKC59-622, SKH44-442, SKC59-522, SKH44-472 SKH44-432 and SKG73-412 (recorded 103.3, 106, 113.3, 130, 132, 156.3 and 169.3 egg masses per plant, respectively). Data obtained from this research were paving the way to further screenings of other sugar beet genotypes to obtain the highly resistant genotypes vs RKN. Sugar beet breeding programs must also be continued, including introducing genotypes resistant to RKN and improving genotypes that were less susceptible to infection resulting from the previous program, to make them available in the Egyptian market.
Keywords
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