Rps Verma

Genetics of corn leaf aphid (Rhopalosiphum maidis) resistance in barley

A study was undertaken to determine the genetics of corn leaf aphid (CLA) resistance in barley under controlled conditions with artificial inoculation at adult plant stage. Inheritance of CLA resistance was investigated in five resistant barley genotypes (EB921, EB2507, Manjula, DL529 and K144) in crosses with susceptible parent Alfa93 in F1, F2, F3 and backcross (BCF1) generations. The aphid inoculation was done using the brush method as well as the detached leaf method. Individual plants were classified in resistant, moderately resistant, susceptible and highly susceptible categories base on number per shoot as well as multiplication of CLA on any of the fresh, young leaf. The plants scored as resistant or moderately resistant were observed twice more at 10 days interval to confirm their reaction. Resistance was governed by a single dominant gene in EB921, DL529 and K144, while it was monogenic recessive in Manjula and EB2507. These diverse sources may be used in breeding for CLA resistance in barley im...

Identification of barley genotypes with higher protein content coupled with bold grains for food and malt barley improvement under sub-tropical climates

Identification of barley genotypes with higher protein content coupled with bold grains for food and malt barley improvement under sub-tropical climates Dinesh Kumar*, RPS Verma1, Sneh Narwal, Jogendra Singh, Vishnu Kumar, Ajit Singh Kharub and Gyanendra Pratap Singh ICAR-Indian Institute of Wheat and Barley Research, Karnal -132 001, India 1International Centre for Agricultural Research in the Dry Areas , Rabat, Morocco

Genotypic and growing location effect on grain β-glucan content of barley under sub-tropical climates

Effect of genotype and growing location on barley grain beta glucan content was studied in 25 barley genotypes grown over six different locations in India. Based upon the two years results, the genotypes BCU 554, BH 963, BHS 352 and DWR 30 were having higher content of beta glucan while the genotypes Azad, BCU2030, Bilara-2, Jagriti, K 14, K 141, Lakhan, Manjula, SLOOP SA WI 3167 and SLOOP VIC VB 9953 had lower values. The growing location has also been found to affect the beta glucan content significantly. Positive simple correlation has been found between grain beta glucan content and protein, 1000 grain weight, plump kernels and test weight.