Combining Ability Studies in Maize (&lt;i&gt;Zea Mays&lt;/i&gt; L.)

R, Kambe Gouda; Kage, Udaykumar; Lohithaswa, H. C.; Shekara, B. G.; Shobha, D.

doi:10.5376/mpb.2013.04.0014

Cited by 15 publications

(11 citation statements)

References 2 publications

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“…Generally, the gca effects of the parents were reflected in the sca effects of the crosses in most of the studied traits. This was confirmed with the findings of Gowda et al [57], Gissa et al [58], and Ahmed et al [55], who obtained high estimates of sca from high gca parents.…”

Section: Specific Combining Ability (Sca) Effectssupporting

confidence: 89%

Combining Ability and Heterosis in Diallel Analysis of Maize (Zea mays L.) Lines

2020

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A sound breeding program for maize improvement is very important to meet the demands of the growing population. Therefore, combining ability and heterosis were studied in a 4 x 4 full diallel cross in maize for growth attributes, yield and its contributing traits. Randomized Complete Block Design (RCBD) with four replicates was used to study the general combining ability of parents, specific combining ability of F1s (including reciprocals) and heterosis of the F1s over commercial check variety on selected agronomic characters. Genotype was highly significant for all the traits studied. The combining abilities (GCA and SCA) and reciprocal mean squares were highly significant for most studied characters. The ratio of GCA/SCA was not less than unity for studied traits excepted for days to anthesis and ear height. The results indicated that the additive genetic effects were more important and played major role in studied traits. Thus, results revealed GCA effects for the parental lines (PL). Where ‘PL2’ was excellent combiner for number of tassels and cob circumference and ‘PL3’ was good combiner for days to silking and grain yield (t.h-1). While ‘PL4’ for short height. Majority of the F1s from the GCA effects showed high SCA effects. This F1 (PL2 x PL3) performed best amongst. However, several reciprocals were not desirable. Heterosis estimation was carried out using a commercial check, Oba super II. When commercial check was used, the percent heterosis especially on grain yield varied from -8.89 to 22.62%. Among the twelve F1s, nine of the crosses exhibited significant positive heterosis for grain yield (t.h-1). Those F1s that showed significant positive and/or negative desirable traits for SCA effects and significant positive heterosis could be used for varietal development in maize breeding. And conservation of those parents that exhibited high GCA effects be considered as well.

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Section: Specific Combining Ability (Sca) Effectssupporting

confidence: 89%

Combining Ability and Heterosis in Diallel Analysis of Maize (Zea mays L.) Lines

2020

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“…On the other hand, the magnitude of SCA was higher than GCA for plant height, number of grain per row and grain yield, indicating non-additive gene action in controlling these traits. Non-additive gene action was also reported on plant height (Kadir, 2010), number of kernel per row (Abdel-Moneam et al, 2009) and grain yield (Abdel-Moneam et al, 2009;Kadir, 2010;Barakat and Osman, 2008;Gouda et al, 2013;Hoque et al, 2016) in their study. These investigations supported the present study.…”

Section: Analysis Of Variancementioning

confidence: 52%

Inheritance and combing ability in maize using a 7x7 diallel cross

Begum¹,

Alam²,

Omy³

et al. 2018

J. Plant Breed. Crop Sci.

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Twenty one F1s produced from 77 diallel mating along with the 7 parents were evaluated to notice the inheritance and combining ability of different traits to obtain high heterotic crosses. Genetic analysis and combing ability were analyzed following Hayman's and Griffing's diallel analyses, respectively. Hybrids projecting positive or negative potency ratio with >1.0 value for those traits is also the sign of incidence of over-dominance in desirable direction, and heterosis breeding is important to improve those traits in maize. Hayman's approach indicated dominance variance and the proportion of +/genes was higher than additive variance in all characters. Griffing's analysis also demonstrated the presence of over-dominance governing the traits. The preponderance of dominant gene action coupled with low heritability observed for days to silking, ear length and grain yield suggests the importance of heterosis breeding. Substantial differences in general combing ability and specific combining ability were noticed in all the studied traits except 1000-grain weight. The parental line CML-509 was found to be the best general combiner for days to tasseling and silking, CML-498 for plant height, ear height and grain yield, CML-395 for ear length and grain yield. The crosses CML-498×CML-376, CML-498×CML-395 and CML-376×CML-247 showed significant positive specific combining ability effect for grain yield along with higher mean values over commercial check varieties.

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“…Whereas, tester BML 7 was good general combiner for plant height, ear girth and number of kernels per row. Table.3a Estimates of general combining ability (gca) effects for yield and yield component characters in maize Dar et al, (2017), Kambe Gouda et al, (2013), Shushay et al, (2013), Sumalini and Shobha Rani (2011), Gowhar Ali et al, (2007), Malik et al, (2004) and Venugopal et al, (2002) for grain yield and other component characters.…”

Section: Resultsmentioning

confidence: 99%