Identification of resistant sources against spot blotch and stripe rust of barley

of Abstract Stripe rust and spot blotch are major biotic constraints in yield maximization of barley. Stripe rust, caused by fungus, Puccinia striiformis f. sp. hordei , is wide spread in northern hills and in the states of Punjab, Haryana and Rajasthan. Spot blotch ( Bipolaris sorokiniana ) is one of the major diseases in north eastern Indo-Gangetic plains. The resistant sources for stripe rust are available but the genetic resources for spot blotch are indeed meagre. Therefore, present investigation was aimed to identify combined resistant sources for stripe rust and spot blotch in barley. The experiments for stripe rust were conducted at Durgapura and Karnal during 2015-16 to 2017-18. While, spot blotch evaluation was carried out for two years (2015-16 and 2016-17) at Faizabad and Karnal centres. The indigenous genotypes, DWRB127, DWRB128, DWRB136, DWRB137, DWRB143, RD2786 and Dolma showed resistance for stripe rust. Based upon stripe rust and spot blotch reactions four genotypes DWRB136, Notch-2, Orosus and Bella Union were found promising. Similarly, the cross combination viz ., Lbiran/Una80//Lignee640/3/Bbsc/4/Chamico and P.sto/3/Libran/ Una80//Lignee640/4/Bllu/5/ Petunia1 were also considered promising for barley stripe rust and spot blotch. Therefore, these identified genotypes can be incorporated in future barley breeding programmes for stripe rust and spot blotch resistance.

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