7 research outputs found
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No full textNot AvailableSafflower (Carthamus tinctorius L.), an important edible oilseed crop in India, succumbs to wilt (Fusarium oxysporum f.sp. carthami) and Phytophthora damping-off and leaf blight (Phytophthora parasitica var. nicotianae). Chemical control is not very effective in controlling these diseases. Host-plant resistance is an effective mode to manage them. Hence, an attempt was made in this investigation to identify and develop safflower genotypes resistant to wilt and Phytophthora. Inbred lines developed through pedigree method followed by inbreeding were screened against wilt in wilt sick plot and the same were screened against Phytophthora using agar disc inoculation technique in greenhouse. Four inbred lines viz., W-05-2028, W-2026, DSI-101 and DSI-118 exhibited resistance to wilt (>20% wilt incidence) in wilt sick plots across locations where the susceptible checks, Nira and PBNS-12 exhibited 80-90% wilt incidence. The same inbred lines were also found to be resistant to Phytophthora with <20% disease severity while the susceptible check, PBNS-12 showed 85% disease. These multiple resistant inbred lines would be of great value to breeders for simultaneous incorporation of resistance to wilt and Phytophthora blight in elite safflower lines and hybrids.Not Availabl
Castor Management Practices
No full textNot AvailableCastor management practices explained in teluguNot Availabl
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No full textNot AvailableFusarium wilt caused by Fusarium oxysporum f sp. Carthami Klisiewicz and Houston is a major disease in safflower. Sources of resistance to Fusarium wilt among the vast collections of safflower germplasm were very few. The multiple crossings effected between susceptible high yielding lines and the wilt resistant breeding lines resulted into identification of several wilt resistant lines. Among them, six lines found to be stable for wilt resistance (<20% wilt incidence) over years of screening in wilt sick plot. These lines have exhibited 73-105% superiority in seed yield and 88-139% superiority in oil yield over the high yielding national check variety, A1 when tested in the research farm of the Directorate of Oilseeds Research, Hyderabad. One of these entries viz., DSI-101 when tested for yield performance at 19 locations in Initial Varietal Trial (IVT) of AICRP (Safflower), recorded 18.3% higher seed yield and 26% higher oil yield over the highest yielding national check variety, A1 under irrigated conditions and 2.7% higher oil yield over A1 and near on par with A1 with respect to seed yield under rainfed conditions. It also exhibited resistance to Fusarium wilt in multilocation wilt sick plots in IVT.Not Availabl
