DWRB 91: New Late Sown Malt Barley Variety for NWPZ

 Vishnu Kumar*, R.P.S. Verma, A.S. Kharub, Dinesh Kumar and R. Selvakumar

DWRB91 Malt BarleyBarley (Hordeum vulgare L.) is an important coarse cereal crop, being grown in rabi (winter) season in northern plains, hills and north-eastern plains of India. Since long it has been considered, as poor man’s crop because of its low input requirement and better adaptability to harsh environments, i.e. drought, salinity, alkalinity and marginal lands etc. The demand of malt barley as raw material for malting and brewing is on continuous rise in recent years. Malt is used in beer, hard liquors, malted milk and flavourings in a variety of foods. Barley malt can also be added to many food stuffs such as biscuits, bread, cakes and desserts. Barley is preferred by farmers in the water scare areas of the states as Punjab, Haryana and Rajasthan in rotation to cotton, pearl millet and sorghum, over wheat. The major problem in such areas is the delayed sowing of the rabi, crop. DWRB 91 is a new early maturing malt barley variety and was developed at DWR Karnal. It was identified during 51st AICW&BIP workshop at RRS, SKRAU, Durgapura, Jaipur and subsequently it was also released and notified by the Gazette Notification S.O. No. 952 (E) dated on 10th April, 2013 for irrigated late sown conditions of North Western Plains Zone (NWPZ).

Under coordinated evaluation trials, DWRB 91 (DWR46/RD2552) was tested at a total of 23 locations  with three checks viz. DWRB 73 and DWRUB 52 (both two-row type) and DWRUB 64 (six-row type). DWRB 91 exhibited average grain yield as 4060 Kg/ha (mean of 23 trials over 3 years). It was significantly superior in grain yield on three years mean basis over two-row zonal checks DWRB73 (9.2 %) and DWRUB52 (8.1 %) and was at par with six-row check DWRUB64, respectively. In agronomical trials, the variety DWRB91 was numerical superior over both the late sown checks (DWRB73 and DWRUB64) at recommended nitrogen doses.

DWRB 91 is erect type in growth habit with basal pigmentation on stem, while leaf sheath is non-pigmented. DWRB 91 is an early maturing malt barley variety with mean maturity of about 115 days and having average plant height of 86 cm. Spikes are long parallel in shape with intermediate ear density and semi drooping attitude. Awns are long and yellow in colour. Grains are of bold size with medium hard texture, oval shaped and yellow in colour.

The evaluation of multi-location grain samples for malting quality traits was undertaken for three years. The micro-malting analysis was performed and observations were recorded on different grain and malt quality traits as per the EBC (European Breweries Convention) procedures. In malting quality analysis, DWRB91 has shown advantage in overall quality score (63/87) than all checks (Table 1). It has specific advantages for important traits like bold grains proportion (91.7 %), 1000 g weight (56.3 g) and hot water extract (81 % fgdb) etc. over all the checks. It is comparable with best two-row check DWRUB52 in hectolitre weight, protein content, husk %, malt yield %, diastatic power and Kolbach index etc. under irrigated late sown conditions.   

Table 1. Performance of DWRB 91 for important malting quality traits under coordinated trials

Quality Parameters

DWRB 91

DWRB 73

(2-R C )

DWRUB 64

(6-R C)

DWRUB 52

(2-R C)

Hectolitre Weight (kg/hl)

65

62

60

65.5

Bold Grains  (%)

91.7

84.0

86.5

72.5

Husk (%)

11.1

11.4

12.0

11.0

Protein (%)

10.6

12.3

10.0

11.0

Malt Yield (%)

86

85

88

86

Malt Friability (%)

78

67

61

87

Diastatic Power (0Linter)

105

104

98

85

Hot Water Extract (%)

81

79

77.3

79

Kolbach Index (S/T nitrogen)

40

40

40

39

Total Score

63/87

35/60

39/60

37/57


Authors:

Vishnu Kumar*, R.P.S. Verma, A.S. Kharub, Dinesh Kumar and R. Selvakumar

*Corresponding author’s This email address is being protected from spambots. You need JavaScript enabled to view it.

Directorate of Wheat Research, Karnal, Haryana – 132001