Asian Journal of Plant Sciences

1682-3974 1812-5697

Asian Network for Scientific Information

10.3923/ajps.2006.721.724

Karthika

Lakshmi

B. Subba

4 2006

5 4 A study was undertaken on induced mutagenesis with CO1 and CO2 varieties of soybean. The mutagens studied were gamma rays (20, 30, 40, 50 and 60 kR) and EMS (5, 10, 15, 20 and 25 mM). In an assessment to fix the LD₅₀ value, the varieties responded differently. A subtle difference was observed between the varieties CO1 and CO2 in the degree of tolerance to the mutagens, viz., CO1, (62 kR gamma rays, 26.4 mM EMS) and CO2 (58.3 kR gamma rays and 25.7 mM EMS). It is concluded that CO1 tolerate higher doses of gamma rays and EMS. In general, the treated population had manifested a reduced expression than the untreated population in all the biometrical traits. Reduction in phenotypic expression is linear with the dose or concentration of the mutagens in M₁ generation. The mutagen gamma ray manifested higher percentage of reduction than EMS. In M₂, EMS induced higher proportion of chlorophyll mutants than gamma rays. Among viable mutants, sterile mutant occurred more predominantly followed by stunted growth in both the varieties due to the effect of mutation. Induced mutations delivered fairly good amount of genotypic coefficient of variation, the heritability, GA as percent of mean with respect to number of seeds per plant, seed yield per plant and hundred seed weight for both the mutagen in both the varieties, indicating the scope for improving the soybean yield by selection. The mutants with four seeded pods, bold seeded types and increased number of pods per plant were isolated from this experiment.

]]>

Balakrishnan, P.C.,

1991

Glycine max (L.) Merill.]]>

Induced mutagenesis in soybean Glycine max (L.) Merill. 1991 2

Bione, N.C.P., M.S. Pagliarini and L.A. De-Almeida,

2002

Genome, 45 1257 1261 3

Cober, E.R., G.R. Ablett, R.I. Buzzell, B.M. Luzzi, V. Poysa, A.S. Sahota and H.D. Voldeng,

1998

Crop Sci., 38 940 941 4

Groose, R.W. and R.G. Palmer,

1987

Soybean Genet. Newslett., 14 169 171 5

Pushpendra and H.H. Ram,

1990

Trop. Agric., 67 57 60 6

Sharma, J.R,

1998

Statistical and Biometrical Techniques in Plant Breeding. pp: 61-68 pp: 61-68 7

Singh, S., J. Singh and R.K. Singh,

2001

Oryza sativa L.).]]>

Crop Res., 22 113 120 8

Takahashi, R. and J. Abe,

1994

J. Hered., 85 447 450 9

Tiwari, S.P.,

2003

J. Oilseeds Res., 20 1 8 10

Vanniarajan, C. and L.D. Vijendra-Das,

1996

Madras Agric. J., 84 114 115 11

Xing, W.D., S.Q. Yao, X.Y. Wu, L.G. Fu and L.J. Ying et al.,

1997

Oryza sativa L.).]]>

J. Zhejiang Agric. Univ., 23 451 452 12

Johnson, H.W. and H.L. Bornard,

1976

Soybean Genetics and Breeding. 1976 pp: 1-70 pp: 1-70