Combining Ability and Genetic Diversity Using SSR Mrkers for Some Maize Inbred Lines = القدرة على التآلف و التباعد الوراثي باستخدام المعلمات الجزيئية SSR لبعض سلالات من الذرة الشامية

2016 ◽  
Vol 20 (2) ◽  
pp. 373-395
Author(s):  
M. M. Kamara
Keyword(s):  
Genetic Diversity ◽  
Combining Ability ◽  
Inbred Lines ◽  
Maize Inbred Lines

scholarly journals Genetic Diversity and Heterotic Orientation of South Africa Maize Inbred Lines Towards Tropical and Temperate Testers

2021 ◽  
Author(s):  
Siphiwokuhle Funani Shandu ◽  
John Derera ◽  
Kingston Mashingaidze ◽  
Edmore Gasura
Keyword(s):  
South Africa ◽  
Genetic Diversity ◽  
Grain Yield ◽  
Combining Ability ◽  
Molecular Genetic ◽  
Inbred Lines ◽  
Genetic Distances ◽  
Specific Combining Ability ◽  
Heterotic Groups ◽  
Maize Inbred Lines

Abstract An efficient hybrid breeding program defines and utilizes few heterotic groups. The objectives of this study were to determine genetic diversity and alignment of South Africa maize inbred lines collection towards tropical and temperate testers. Forty-two maize inbred lines were genotyped with 56110 single nucleotide polymorphism (SNP) DNA markers, using the Illumina MaizeSNP50 Bead chip. The 42 lines were crossed to two tropical and two temperate inbred line testers. The testcrosses were evaluated across seven environments, in South Africa, during 2014-2016. Genotypes and specific combining ability (SCA) effects of hybrids were significantly different (P<0.05) for grain yield. There was a weak correlation between molecular genetic distances and both grain yield mean and specific combining ability effects of hybrids, indicating that productivity of maize inbred lines could not be reliably determined based on molecular genetic distances. The SCA data was capable of classifying these maize inbred lines into three heterotic groups with respect to both tropical and temperate testers. Only a few lines could not be grouped on the basis of SCA data. The study also indicated high level of diversity among the maize inbred lines, which was shown by both the dendogram and molecular genetic distances. The SNP marker data classified the inbred lines into 11 clusters that could be simplified into three major groups of normal maize endosperm and two groups of quality protein maize (QPM) endosperm types. However, the SNP data indicated that maize lines were more aligned towards tropical than temperate inbred testers. This information would be useful for simplifying heterotic classification of the lines with profound implications for breeding progress.

scholarly journals Combining Ability of Sixteen USA Maize Inbred Lines and Their Outbreeding Prospects in China

2018 ◽  
Author(s):  
Sun Jiying ◽  
Ju-lin Gao ◽  
Xiao-fang Yu ◽  
Jian Liu ◽  
Zhi-jun Su ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Combining Ability ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Corn Production ◽  
Maize Inbred Lines ◽  
American Maize ◽  
Excellent Control ◽  
Mating Method ◽  
Future Utilization

In China, there is an increasing need for greater genetic diversity in maize (Zea mays L.) germplasm and hybrids appropriate for mechanical harvesting. In order to test and distinguish American maize inbred lines with exceptional combining ability, four Chinese maize inbred lines (Chang7-2, Zheng 58, four-144 and four-287) were used to judge the combining ability and heterosis of 16 USA inbred lines by a NCII genetic mating method. The results showed that among the American inbred lines, 6M502A, LH208, NL001, LH212Ht, PHW51, FBLA and LH181 expressed good GCA for yield characteristics; while RS710, PHP76, FBLA, and PHJ89 showed excellent GCA for machine harvesting characteristics. Five hybrids (NL001 &times; Chang7-2, LH212Ht &times; Chang7-2, FBLA &times; four-144, LH181 &times; four-287, PHK93 &times; four-287) had better SCA values for yield characteristics, at 1.69, 1.07, 1.48, 1.84 and 1.05, respectively; while NL001 &times; Chang 7-2, 6M502A &times; Chang7-2, LH212Ht &times; Chang7-2, LH181 &times; four-287, PHW51 &times; Chang7-2 had better TCA values for yield characteristics, at 3.03, 2.80, 2.41, 2.19 and 1.91, respectively; NL001 &times; Chang7-2, 6M502A &times; Chang7-2, LH212Ht &times; Chang7-2, LH181 &times; four-287, PHW51 &times; Chang7-2 showed excellent Control Heterosis values, with 21.48%, 19.64%, 15.93%, 14.05% and 11.60% increases, respectively, compared to the check and potential for future utilization in Inner Mongolian corn production.

scholarly journals Combining Ability of Sixteen USA Maize Inbred Lines and Their Outbreeding Prospects in China

Agronomy ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 281 ◽  
Author(s):  
Ji-ying Sun ◽  
Ju-lin Gao ◽  
Xiao-fang Yu ◽  
Jian Liu ◽  
Zhi-jun Su ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Combining Ability ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Corn Production ◽  
Maize Inbred Lines ◽  
American Maize ◽  
Excellent Control ◽  
Mating Method ◽  
Future Utilization

In China, there is an increasing need for greater genetic diversity in maize (Zea mays L.) germplasm and hybrids appropriate for mechanical harvesting. In order to test and distinguish American maize inbred lines with exceptional combining ability, four Chinese maize inbred lines (Chang7-2, Zheng 58, four-144 and four-287) were used to judge the combining ability and heterosis of 16 USA inbred lines by a NCII genetic mating method. The results showed that among the American inbred lines, 6M502A, LH208, NL001, LH212Ht, PHW51, FBLA and LH181 expressed good GCA for yield characteristics; while RS710, PHP76, FBLA, and PHJ89 showed excellent GCA for machine harvesting characteristics. Five hybrids (NL001 × Chang7-2, LH212Ht × Chang7-2, FBLA × four-144, LH181 × four-287, PHK93 × four-287) had better SCA values for yield characteristics, at 1.69, 1.07, 1.48, 1.84 and 1.05, respectively; while NL001 × Chang 7-2, 6M502A × Chang7-2, LH212Ht × Chang7-2, LH181 × four-287, PHW51 × Chang7-2 had better TCA values for yield characteristics, at 3.03, 2.80, 2.41, 2.19 and 1.91, respectively; NL001 × Chang7-2, 6M502A × Chang7-2, LH212Ht × Chang7-2, LH181 × four-287, PHW51 × Chang7-2 showed excellent Control Heterosis values, with 21.48%, 19.64%, 15.93%, 14.05% and 11.60% increases, respectively, compared to the check and potential for future utilization in Inner Mongolian corn production.

Combining Ability of Traits Related to Nitrogen Use Efficiency in Eighteen Maize Inbred Lines

2014 ◽  
Vol 40 (5) ◽  
pp. 838 ◽  
Author(s):  
Chao CUI ◽  
Ju-Lin GAO ◽  
Xiao-Fang YU ◽  
Zhi-Jun SU ◽  
Zhi-Gang WANG ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Combining Ability ◽  
Inbred Lines ◽  
Nitrogen Use ◽  
Maize Inbred Lines ◽  
Use Efficiency

Combining Ability of Maize Inbred Lines from Shaan A Group and Shaan B Group under Different Density Conditions

2017 ◽  
Vol 43 (9) ◽  
pp. 1328 ◽  
Author(s):  
Bo-Xin WANG ◽  
Ya-Hui WANG ◽  
Peng-Fei CHEN ◽  
Xu-Dong-Yu LIU ◽  
Zhi-Qian FENG ◽  
...  
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
Maize Inbred Lines

scholarly journals Combining Ability of Some Maize Inbred Lines and its Crosses Under Non-Stressed and Water Stressed Conditions

2016 ◽  
Vol 7 (12) ◽  
pp. 1431-1436
Author(s):  
M. Sultan ◽  
M. Abdel-Moneam ◽  
A. EL- Galfy ◽  
Hend El-Awady
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
Maize Inbred Lines

scholarly journals Phenotypic and molecular characterization of a set of tropical maize inbred lines from a public breeding program in Brazil

BMC Genomics ◽  
2022 ◽  
Vol 23 (1) ◽  
Author(s):  
Sirlene Viana de Faria ◽  
Leandro Tonello Zuffo ◽  
Wemerson Mendonça Rezende ◽  
Diego Gonçalves Caixeta ◽  
Hélcio Duarte Pereira ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Inbred Lines ◽  
Breeding Program ◽  
Tropical Maize ◽  
Maize Breeding ◽  
Breeding Programs ◽  
The Public ◽  
Maize Inbred Lines

Abstract Background The characterization of genetic diversity and population differentiation for maize inbred lines from breeding programs is of great value in assisting breeders in maintaining and potentially increasing the rate of genetic gain. In our study, we characterized a set of 187 tropical maize inbred lines from the public breeding program of the Universidade Federal de Viçosa (UFV) in Brazil based on 18 agronomic traits and 3,083 single nucleotide polymorphisms (SNP) markers to evaluate whether this set of inbred lines represents a panel of tropical maize inbred lines for association mapping analysis and investigate the population structure and patterns of relationships among the inbred lines from UFV for better exploitation in our maize breeding program. Results Our results showed that there was large phenotypic and genotypic variation in the set of tropical maize inbred lines from the UFV maize breeding program. We also found high genetic diversity (GD = 0.34) and low pairwise kinship coefficients among the maize inbred lines (only approximately 4.00 % of the pairwise relative kinship was above 0.50) in the set of inbred lines. The LD decay distance over all ten chromosomes in the entire set of maize lines with r2 = 0.1 was 276,237 kb. Concerning the population structure, our results from the model-based STRUCTURE and principal component analysis methods distinguished the inbred lines into three subpopulations, with high consistency maintained between both results. Additionally, the clustering analysis based on phenotypic and molecular data grouped the inbred lines into 14 and 22 genetic divergence clusters, respectively. Conclusions Our results indicate that the set of tropical maize inbred lines from UFV maize breeding programs can comprise a panel of tropical maize inbred lines suitable for a genome-wide association study to dissect the variation of complex quantitative traits in maize, mainly in tropical environments. In addition, our results will be very useful for assisting us in the assignment of heterotic groups and the selection of the best parental combinations for new breeding crosses, mapping populations, mapping synthetic populations, guiding crosses that target highly heterotic and yielding hybrids, and predicting untested hybrids in the public breeding program UFV.

scholarly journals EVALUATION OF SOME WHITE MAIZE INBRED LINES FOR COMBINING ABILITY BASED ON TOP-CROSSES

2008 ◽  
Vol 33 (3) ◽  
pp. 1747-1760
Author(s):  
H. Abd El-Ghany ◽  
M. Osman ◽  
Moshera Sadek
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
Maize Inbred Lines
Sign in / Sign up

Export Citation Format

Share Document