Reddy et al.

girth,ȱ earȱ length,ȱ numberȱ ofȱ kernelȱ rowsȱ perȱ ear,ȱ 31ȱhybridsȱregisteredȱwithȱaȱrangeȱofȱ-20.52ȱtoȱ5.24ȱ

numberȱ ofȱ kernelsȱ perȱ row,ȱ 100-seedȱ weightȱ andȱ percent.ȱHowever,ȱstandardȱheterosisȱinȱ15ȱhybridsȱ

grainȱyieldȱperȱplant.

overȱDHM-117ȱregisteredȱwithȱaȱrangeȱofȱ-17.66ȱtoȱ

Theȱ dataȱ regardingȱ heterosis,ȱ heterobeltiosisȱ andȱ

2.69ȱandȱ23ȱhybridsȱoverȱ900ȱMȱGold,ȱrangeȱofȱ-19.12ȱ

standardȱheterosisȱforȱyieldȱandȱyieldȱcomponentsȱinȱ

toȱ0.88.ȱTwentyȱfour,ȱ27,ȱ13ȱandȱ18ȱhybridsȱrecordedȱ

maizeȱwereȱpresentedȱinȱTablesȱ2,ȱ3ȱandȱ4ȱrespectively.

significantȱ negativeȱ heterosis,ȱ heterobeltiosisȱ andȱ

standardȱheterosisȱoverȱDHM-117ȱandȱ900ȱMȱGold,ȱ

Maturityȱisȱanȱimportantȱattributeȱofȱaȱgivenȱgenotype,ȱ respectivelyȱforȱdaysȱtoȱ50ȱperȱcentȱsilking.ȱWhile,ȱ36ȱ

whichȱdirectlyȱorȱindirectlyȱaffectsȱeconomicȱyield.ȱ hybridsȱforȱdaysȱtoȱmaturityȱhadȱaverageȱheterosisȱ

Maturityȱitselfȱisȱexpressedȱbyȱseveralȱcomponentsȱ withȱaȱrange,ȱ-11.57ȱtoȱ6.92,ȱ43ȱhybridsȱheterobeltiosisȱ

suchȱ asȱ daysȱ toȱ 50ȱ perȱ centȱ tasseling,ȱ daysȱ toȱ 50ȱ withȱrangeȱofȱ-15.97ȱtoȱ3.03,ȱ30ȱhybridsȱforȱstandardȱ

perȱ centȱ silkingȱ andȱ daysȱ toȱ maturity.ȱ Inȱ pooledȱ heterosisȱoverȱDHM-117,ȱwithȱrangeȱofȱ-16.04ȱtoȱ1.68ȱ

analysisȱtheȱaverageȱnegativeȱheterosisȱforȱdaysȱtoȱ andȱ29ȱhybridsȱwithȱaȱrangeȱofȱ-15.62ȱtoȱ2.30ȱoverȱ

50ȱperȱcentȱtasselingȱwasȱfoundȱtoȱbeȱinȱtheȱrangeȱ 900ȱMȱGold.ȱTheȱbestȱcrossesȱforȱearlinessȱwithȱhighȱ

ofȱ-10.71ȱtoȱ10.89ȱperȱcentȱwithȱ23ȱcrossesȱregisteredȱ standȱ heterosis,ȱ heterobeltiosis,ȱ averageȱ heterosisȱ

significantȱ negativeȱ heterosis.ȱ Heterobeltiosisȱ inȱ andȱ per se ȱperformanceȱwereȱBML-2782ȱXȱBML-5233-

Table 2: Average heterosis for yield and yield components in maize

No. of desirable

S.No.

Characters

Range

Best hybrid combinations

heterotic hybrids

BML-2782 X BML-5233-5, CM-211 X

1

Days to 50 per cent tasseling -10.71** to 10.89**

23

BML-5233-5 and BML-2486 X BML-2

BML-2782 X BML-5233-5, CM-211 X

2

Days to 50 per cent silking

-12.04** to 10.74**

24

BML-5233-5, BML-2486 X BML-2

CM-211 X BML-5233-5, BML-2486 X

3

Day to maturity

-11.57** to 6.92**

36

BML-2910 and BML-5233-5 X BML-2910

BML-15 X BML -2910, CM-211 X BML-15

4

Plant height (cm)

-10.31*to 78.98**

37

and BML-2782 X BML-3044

BML-6 X BML-2910,CM-211 X BML-

5

Ear height (cm)

-19.37** to 103.04**

31

3044 and CM-211 X BML-15

BML-2486 X BML-6, BML-7 X BML-3044

6

Ear girth (cm)

-7.10 to 38.75**

38

and BML-6 X BML-7

BML-2486 X BML-2, BML-15 X BML-

7

Ear length (cm)

0.15 to 74.07**

38

2910 and BML-7 X BML-3044

BML-2782 X BML-5233-5, CM-211 X

Number of kernel rows per

8

-6.10 to 28.98**

18

BML-5233-5 and BML-5233-5 X BML-

ear

2910

BML-6 X BML-3044, BML-2486 X BML-2

9

Number of kernels per row

-3.65 to 101.15**

42

and BML-15 X BML-2910

BML-5233-5 X BML-7, BML-15 X BML-

10

100-seed weight (g)

-19.66** to 60.15**

37

2910 and CM-211 X BML-5233-5

BML-15 X BML-2910, BML-2782 X BML-

11

Grain yield per plant (g)

-16.75** to226.21**

43

7 and BML-2782 X BML-6

274