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The Journal of Research ANGRAU

Contents of 41(1) 2013 - acharya ng ranga agricultural university

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GENE ACTION AND COMBINING ABILITY STUDIES IN CHICKPEA<br />

S.<br />

No.<br />

Character<br />

gca<br />

(df=6)<br />

sca<br />

(df=21)<br />

error<br />

(df=54)<br />

² gca<br />

² sca<br />

² gca<br />

/ ²<br />

sca<br />

1 Days to 50% flowering 40.42 ** 12.15 ** 2.43 4.22 9.72 0.43 0.41<br />

2 Days to maturity 9.49 ** 2.00 ** 0.62 0.99 1.38 0.71 0.50<br />

3 Plant height (cm) 70.00 ** 6.30 ** 1.13 7.65 5.17 1.48 0.71<br />

h 2<br />

4<br />

5<br />

Number <strong>of</strong> branches<br />

per plant<br />

Number <strong>of</strong> pods per<br />

plant<br />

37.03 ** 18.75 ** 0.61 4.05 18.14 0.22 0.18<br />

533.32 ** 360.87 ** 1.28 59.12 359.60 0.16 0.25<br />

6 Seed yield per plant (g) 7.16 ** 30.70 ** 0.16 0.78 30.54 0.03 0.05<br />

7 100 seed weight (g) 276.73 ** 20.19 ** 1.35 30.60 18.83 1.62 0.75<br />

* Significant at Pd”0.05, ** Significant at P d”0.01, gca – general combining ability; sca – specific combining<br />

ability; s² gca – variance due to gca ; s² sca – variance due to sca. h 2 - heritability in narrow sense<br />

Table 2. Estimates <strong>of</strong> general combining (gca) effects for seven yield attributes in Chickpea<br />

S.<br />

No.<br />

Genotype<br />

Character<br />

NBeG-3 JG-11<br />

ICCV0<br />

5106<br />

M N<br />

K-1<br />

ICCV9<br />

5333<br />

KAK-2<br />

Vihar<br />

S.Em<br />

<strong>of</strong> Gi<br />

S.Em<br />

<strong>of</strong><br />

Gi-Gj<br />

1<br />

Days to 50<br />

percent Flowering -0.476 -3.03** -2.59 ** 1.97 ** 1.60 ** 0.49 2.04 ** 0.48 0.73<br />

2 Days to maturity -1.00 ** -1.15 ** -0.30 0.85 ** 0.00 -0.185 1.78 ** 0.24 0.37<br />

3 Plant height -2.02 ** -2.75 ** 0.53 4.92 ** 1.91 ** -2.63 ** 0.04 0.33 0.50<br />

4<br />

Number <strong>of</strong><br />

branches per<br />

plant<br />

2.22 ** 2.85 ** -0.01 -3.18 ** -1.08 ** -0.55 * -0.25<br />

0.24 0.37<br />

5<br />

6<br />

7<br />

Number <strong>of</strong> pods<br />

per plant<br />

Seed yield per<br />

plant<br />

100 seed<br />

weight<br />

2.77 ** 12.19 ** 3.16 ** -12.95 ** -3.95 ** -2.22 ** 1.02 ** 0.35 0.53<br />

0.76 ** 0.46 ** -0.71 ** -1.41 ** -<br />

0.56 ** 0.51** 0.96 ** 0.12 0.19<br />

-3.71 ** -6.61 ** -3.34 ** 10.31 ** 3.00 ** -0.38 0.73 * 0.36 0.55<br />

*Significant at Pd” 0.05 , **Significant at Pd”0.01<br />

traits, JG-11 and ICCV 05106 recorded significant<br />

desirable negative gca effects for days to 50 per cent<br />

flowering, while, NBeG-3 and JG-11 for days to<br />

maturity, suggesting that these parents could be good<br />

general combiners for breeding for earliness. <strong>The</strong> high<br />

general combining ability for plant height and 100<br />

seed weight was recorded in MNK-1 and ICCV 95333.<br />

For seed yield per plant the genotypes viz., NBeG-3,<br />

80

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