Mechanisms and diversity of resistance to sorghum shoot fly, Atherigona soccata
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Riyazaddin Mohammed, Polavarapu B. Kavi Kishor, Ashok Kumar Are, Belum Venkata Subba Reddy, Rajendra S. Munghate, Hari C. Sharma. (15/6/2015). Mechanisms and diversity of resistance to sorghum shoot fly, Atherigona soccata. 1.
Abstract
Sorghum shoot fly, Atherigona soccata, is one of the important pests of
postrainy season sorghums. Of the 90 sorghum genotypes evaluated for
resistance to this pest, RHRB 12, ICSV 713, 25026, 93046 and 25027,
IS 33844-5, Giddi Maldandi and RVRT 3 exhibited resistance in postrainy
season, while ICSB 463, Phule Anuradha, RHRB 19, Parbhani Moti,
ICSV 705, PS 35805, IS 5480, 5622, 17726, 18368 and 34722, RVRT
1, ICSR 93031 and Dagidi Solapur showed resistance in rainy season,
suggesting season-specific expression of resistance to A. soccata. ICSB
461, ICSB 463, Phule Yasodha, M 35-1, ICSV 700, 711, 25010, 25019
and 93089, IS 18662, Phule Vasudha, IS 18551 and 33844-5 and Barsizoot
had fewer deadhearts than plants with eggs across seasons, suggesting
antibiosis as one of the resistance mechanism. Five genotypes
exhibited resistance with high grain yield across seasons. Correlation,
path and stepwise regression analyses indicated that leaf glossiness, seedling
vigour, trichome density, oviposition and leaf sheath pigmentation
were associated with the expression of resistance/susceptibility to shoot
fly, and these can be used as marker traits to select and develop shoot
fly-resistant sorghums