Relationships between heterosis, genetic distances and specific combining ability among CIMMYT and Zimbabwe developed maize inbred lines under stress and optimal conditions

Ndhlela, Thokozile; Herselman, L.; Semagn, Kassa; Magorokosho, Cosmos; Mutimaamba, Charles; Labuschagne, Maryke

doi:10.1007/s10681-015-1353-z

Cited by 31 publications

(26 citation statements)

References 21 publications

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“…However, Ceballos et al (2016) observed weak associations between the GD and SCA effects, which presented r 2 values ranging from 0.00 to 0.28. Ndhlela et al (2015) and Dreisigacker et al (2005) found no explicit correlation between GD and heterosis. Cress (1966) proposed that the extent of GD between parents is necessary for significant heterosis but is not sufficient to guarantee it.…”

Section: Introductionmentioning

confidence: 90%

Combining ability, heterosis, genetic distance and their intercorrelations for waterlogging tolerance traits in chrysanthemum

Zhang

Yang

et al. 2017

Euphytica

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Waterlogging tolerance (WT) is a major objective in chrysanthemum breeding programs, and although certain genotypes with different tolerance levels have been identified, their value as parents for WT breeding is unknown. Here, twelve F 1 crosses derived from an incomplete diallel mating scheme were conducted to investigate combining ability and heterosis for WT and their relationships with parental genetic distance. The results showed that the membership function value of waterlogging (MFVW) was controlled by additive and non-additive gene effects, whereas other growth and biomass traits were mainly controlled by non-additive gene effects. The estimated broad and narrow sense heritabilities of the MFVW were 97.5 and 51.5%, respectively. Combining ability analyses indicated that 'Nannong Xuefeng' showing the largest general combining ability (GCA) effect for the MFVW was the best combiner, and identified several best cross combinations with high positive specific combining ability (SCA) effects for most WT-related traits. Mid-and high-parent heterosis occurred widely. The three distance measures, based on phenotypic traits (PD), molecular markers (GD) and markers linked with quantitative trait loci (QTL-GD), presented a nonsignificant correlation with combining ability except for the GD with GCA for the relative root fresh weight. The correlations between the QTL-GD and heterosis were significant for certain traits and generally higher than that of the PD or GD and heterosis. The SCA effects were positively correlated with heterosis for most of the WT traits (0.51 B r B 0.80). The findings benefit understanding the inheritance mode and then achieving desirable improvement for WT in chrysanthemum.

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Section: Introductionmentioning

confidence: 90%

Combining ability, heterosis, genetic distance and their intercorrelations for waterlogging tolerance traits in chrysanthemum

Zhang

Yang

et al. 2017

Euphytica

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“…A positive association has been reported between molecular marker-based GD and hybrid performance in pearl millet [20], while few studies have indicated a negative relationship [17,21]. Similarly, some studies found a positive relationship between molecular marker based genetic diversity and heterosis in other crops, like in maize [22,23], in rice [24,25] and in sunflower [26], while others reported no relationship between GD and heterosis in maize [27,28], in rice [29,30] and in sunflower [31]. Hence, the present study was designed to investigate genetic diversity in forage type hybrid parents based on both morphological traits and also using two different molecular marker systems (SSRs and GBS-identified SNPs markers), to reveal the relationship between marker based genetic diversity and heterosis for forage traits.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Molecular Marker Based Genetic Diversity Patterns in Hybrid Parents to Develop Better Forage Quality Multi-Cut Hybrids in Pearl Millet

Govintharaj

Gupta

Blümmel³

et al. 2019

Agriculture

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Genetic diversity of 130 forage-type hybrid parents of pearl millet was investigated based on multiple season data of morphological traits and two type of markers: SSRs (Simple sequence repeats) and GBS identified SNPs (Genotyping by sequencing-Single nucleotide polymorphism). Most of the seed and pollinator parents clustered into two clear-cut separate groups based on marker based genetic distance. Significant variations were found for forage related morphological traits at different cutting intervals (first and second cut) in hybrid parents. Across two cuts, crude protein (CP) varied from 11% to 15%, while in vitro organic matter digestibility (IVOMD) varied from 51% to 56%. Eighty hybrids evaluated in multi-location trial along with their parents for forage traits showed that significant heterosis can be realized for forage traits. A low but positive significant correlation found between SSR based genetic distance (GD between parents of hybrid) and heterosis for most of the forage traits indicated that SSR-based GD can be used for predicting heterosis for GFY, DFY and CP in pearl millet. An attempt was made to associate marker-based clusters with forage quality traits, to enable breeders select parents for crossing purposes in forage breeding programs.

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“…The female inbred lines, RML0014 and RML0017, had high, positive and significant GCAs for grain yield and positive and significant GCA for silking (Table 7), implying that they increase grain yield in crosses and at the same time increase silking as well. Therefore, they have are useful for improving grain yield in crosses, but they have an undesirable effect of increasing silking (Hallauer et al, 2010, Ndhlela et al, 2015. Their use will depend primarily on the targeted trait, namely grain versus silking.…”

Section: Discussionmentioning

confidence: 99%

“…Their use will depend primarily on the targeted trait, namely grain versus silking. The male inbred line, RML0010, had high GCA for grain yield and non-significant GCA for silking, hence, it had the necessary propriety for improving grain yield in the crosses and not affecting silking (Ndhlela et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

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Combining ability for grain yield and silking of maize inbred lines derived from three open pollinated varieties released for mid altitudes of Rwanda: Comparison of Diallel and North Carolina Design II

Ngaboyisonga¹,

Nizeyimana²,

Gafishi³

et al. 2019

Afr. Crop Sci. J.

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Relationships between heterosis, genetic distances and specific combining ability among CIMMYT and Zimbabwe developed maize inbred lines under stress and optimal conditions

Cited by 31 publications

References 21 publications

Combining ability, heterosis, genetic distance and their intercorrelations for waterlogging tolerance traits in chrysanthemum

Combining ability, heterosis, genetic distance and their intercorrelations for waterlogging tolerance traits in chrysanthemum

Utilization of Molecular Marker Based Genetic Diversity Patterns in Hybrid Parents to Develop Better Forage Quality Multi-Cut Hybrids in Pearl Millet

Combining ability for grain yield and silking of maize inbred lines derived from three open pollinated varieties released for mid altitudes of Rwanda: Comparison of Diallel and North Carolina Design II

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