Genetics of resistance to rust and powdery mildew in linseed (Linum usitatissimum L.)

Autor: Bhallan Singh Sekhon, Ranjeet Singh Sran, Ashok Kumar, Satish Paul
Rok vydání: 2021
Předmět:
Zdroj: Indian Phytopathology. 74:633-637
ISSN: 2248-9800
0367-973X
DOI: 10.1007/s42360-021-00349-9
Popis: Linseed is an important oilseed crop. It is infected by a number of fungal, bacterial, nematode and viral diseases. Among the 12 fungal diseases infecting the crop, rust (Melampsora lini) and powdery mildew (Oidium lini) are the major diseases causing severe yield losses. Development of resistant varieties is efficacious, economical, durable and safe approach for the management of fungal diseases on linseed. In this context, studies were conducted for investigating the inheritance of resistance to rust and powdery mildew in linseed under field conditions at the prominent hot spot locations i.e., Kangra and Palampur. Inheritance of rust resistance was studied using six generations derived from hybridization between three diverse genotypes i.e. T-397 (susceptible), Nagarkot and Baner (resistant), were evaluated at SAREC, Kangra whereas, inheritance of powdery mildew was studied at Palampur involving varieties T-397 (susceptible) and Nagarkot (resistant). In cross combinations T-397 × Nagarkot and T-397 × Baner, F2 generations were segregated in the ratio 3(R):1(S) indicating the monogenic inheritance of rust resistance. In case of powdery mildew, cross combination T-397 × Nagarkot was tested and F2 generation segregated in the ratio 3(R):1(S) as well. The results obtained from the study indicated that single dominant gene controlled both rust and powdery mildew resistance.
Databáze: OpenAIRE
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