Combining Ability Analysis of Maize Inbred Lines from Line X Tester Mating  Design under Two Plant Population Density

Negi, Manisha; Baskheti, D. C.; jani, Ra

doi:10.20546/ijcmas.2018.706.416

Cited by 1 publication

(2 citation statements)

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“…Crosses produced higher grain yield, which varied from 62.80g/plant (L9 × T3) to 92.12g/plant (L7 × T2) which was higher than parental genotypes. Similar to the present findings, many scientists reported higher grain yield among maize hybrids compared to parental genotypes [25,[28][29][30]. The parental genotypes, suggesting heterosis for these traits in agreement with the previous reports [31].…”

Section: Discussionsupporting

confidence: 93%

“…In line with the present study, maize progenies were previously reported to flower and mature early than parental genotypes due to additive gene effects in the inheritance of these traits [25,28]. Parents L7, L9, L11, L8, T2, and L2 good general combiner for plant height and their crosses L5 × T3 followed by L4 × T3, L14 × T2, L10 × T2, L9 × T2, L8 × T3 and L3 × T1 had highest negative significant SCA effects for plant height has been reported previously [23,25,28]. Crosses L14 × T3, L2 × T2, L5 × T3, L11 × T3 and L6 × T1 showed positive and significant SCA effects for the 100-grain weight which were greater than other crosses and some parental genotypes ( Table 3).…”

Section: Discussionsupporting

confidence: 89%

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Understanding the genetics of important traits in quality protein maize (Zea maysL.) by Line × Tester analysis

Bharti

Dubey

Kumar

et al. 2020

Preprint

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Maize (Zea mays L.) is among the top ten most valuable crops and livestock products. Maize demand and production are continuously rising. The nutritionally rich quality proteins maize (QPM) has almost two times as much lysine as well as tryptophan, amino acids which then the conventional maize varieties. In this study, genetics of important traits in quality protein maize were determined using a Line by Tester matting design. The 45 hybrids were obtained via Line by Tester crossing of 15 lines and 3 testers. The parents and their hybrids were evaluated under two environments. A significant amount of variation was recorded for most of the traits studied. Parental genotypes L2, L6, T2, L8, L7 and L14, exhibited negative and considerable general combining ability (GCA) effects for days to flowering and maturity. L7 × T2, L13 × T3, L10 × T1, L1 × T1, L9 × T2, L5 × T1, L12 × T2, L11 × T3, L10 × T3, L14 × T1 and L6 × T1 were identified with suitable yield and component traits. Crosses L5 × T1, L3 × T1, L12 × T2, L7 × T3, L1 × T2 and L13 × T1 were identified for quality traits. Heterosis over the mid parent crosses L13 × T1 showed highest negative and significant followed by L6 × T1, L12 × T2, L14 × T2 and L2 × T1 for days to 50 per cent tasselling. A significant correlation for the lysine content was determined between F1 mean and specific combining ability (SCA) effects. Overall, this work provides the useful insights into the genetics of important agronomical and biochemical traits of quality protein maize.

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Section: Discussionsupporting

confidence: 93%