Journal of FARM SCIENCES, Vol 19, No 2 (2006)

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Breeding Garden Pea for Combined Resistance to Rust and Powdery Mildew

T.S. Aghora, N. Mohan, R.G. Somkuwari, Girija Ganeshan

Abstract


The objective of the present study was to develop a garden pea variety with combined resistance to powdery mildew and rust along with high yield. Hybridization was done among the parents involving Arka Ajit (resistant to powdery mildew and rust) and IIHR 554, a line from USA with large pod size, green, sweet and bold seeds. Pedigree method of breeding was followed. The rust resistance was controlled by single dominant gene and powdery mildew by single recessive gene. Seggregants with combined resistance to rust and powdery mildew were selected in each generation.  In F7, a promising line, FC-2, now named as Arka Karthik with combined resistance to rust and powdery mildew was selected. Arka Karthik had significantly higher number of pods per plant (31.50), bigger pods (pod length 10.40 cm) and maximum shelling percentage of 62.17. The seeds are bold, green and sweet. Yield performance at IIHR, Hessaraghatta for four years (1997- 2001) showed that Arka Karthik was superior with an average pod yield of 11.32 t/ha. Arka Karthik has recorded 29.4 and 114.0 % yield increase over check varieties Arka Ajit and Bonneville, respectively. Percent disease intensity (PDI) indicated that Arka Karthik was resistant to powdery mildew (PDI 3.25) and rust (PDI 0.76), whereas, the check variety Bonneville was susceptible to both the diseases (PDI 39.97 for powdery mildew and 36.14 for rust).

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