Combining ability of flint corn inbred lines: Mal de R韔 Cuarto disease tolerance and grain yield

The objective of the present study was to determine the general combinatorial aptitude (GCA), specific combinatorial aptitude (SCA) and heterosis in inbred lines of yellow maize and its crosses for, the yield of grain, height of plant and ear and days to male and female flowering. Six inbred lines from CIMMYT, their direct crosses and four controls were evaluated at UNALM during 2016-2018, under a 5 x 5 lattice design with four repetitions. The effects of GCA and SCA were calculated using method II, model I of Griffing. Heterosis was measured based on the mean and best parent. Heterosis was measured based on the mean and best parent. The combined analysis of years showed significance (p ≤ 0.01) in: genotypes by years for days to male and female flowering; GCA for years for days to male flowering and SCA for years for days to female flowering. The effects of ACG for grain yield were significant in lines CML 229 and CML 428, for plant height, precocity, ear and precocity CML 487 line highlighted. The effect of ACE was superior in the cross CML 453 x CML 486 for the grain yield character. Heterosis was higher for the grain yield in the CML 229 x CML 453 and CML 453 x CML 487 crosses. The GCA / SCA relationship evidenced effects of additive genes on plant height, days to male and female flowering, therefore, for grain yield and ear height, non-additive effects governed.

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Combining ability and heterosis for yield, precocity and height in yellow maize genotypes

García-Mora

Chuquija²,

Torres

2020

RevFacAgron(LUZ)

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Analysis on combing ability and estimation of genetic parameters for chlorophyll content in maize

Li¹,

Tang²,

Hu³

et al. 2014

J. Plant Breed. Crop Sci.

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Chlorophyll closely related to photosynthetic capacity and developmental stage in crops. In order to reveal the genetic characters of chlorophyll content in leaf above ear, ear leaf and leaf under ear (threeear-leaves) of maize, ten inbred lines from five different heterotic groups were selected to make crosses by a completely diallel cross design. The combining ability analysis and genetic parameters estimations of chlorophyll content of three-ear-leaves were carried out. The results showed that highly differences existed among ninety F 1 crosses including reciprocal crosses, the general combining ability (GCA) effects and special combining ability (SCA) effects were different and p<0.01. The inbred lines No.10 (Xu178), 1(Ye478) and 7(Dan340) were observed with positive GCA effects while other inbred lines showed negative GCA effects. The crosses 4×9 (Chang7-2×8085Tai) and 6×9 (Zi330×8085Tai) with significantly positive SCA effects were found. The cross 4×6 (Chang7-2×Zi330) appeared maximum negative SCA effect for three-ear-leaves investigated in this study. The GCA effect of inbred lines was not corresponding to the SCA effect. The correlation coefficients between three-ear-leaves were all more than 0.7 which were highly positive correlations. Chlorophyll content showed reciprocal crosses differences (p<0.05). Broad sense heritability and narrow sense heritability were about 55 and 33.5% respectively. The additive effect was greater importance than non-additive effect.

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Combining ability of flint corn inbred lines: Mal de R韔 Cuarto disease tolerance and grain yield

Cited by 2 publications

References 16 publications

Combining ability and heterosis for yield, precocity and height in yellow maize genotypes

Combining ability and heterosis for yield, precocity and height in yellow maize genotypes

Analysis on combing ability and estimation of genetic parameters for chlorophyll content in maize

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