Heterosis and combining ability of tropical maize populations

Cruz-Lázaro, Efraín de la; Nájera, Guillermo Castañón; Brito-Manzano, NP; Gómez-Vázquez, Armando; Robledo-Torres, Valentín; Río, AJ Lozano del

doi:10.32604/phyton.2010.79.011

Cited by 8 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The next best crosses observed for high heterosis and sca effects for grain yield were CM-119 x DMR-40E, CM-104 x AML-420 and CM-119 x DMR-201. These results are in similarity with the earlier findings of Dubey et al (2001), Srivastava and Singh (2003), Lata et al (2006), Kumari et al (2006), Lata et al (2008) Dhliwayo et al (2009), Cruz Lazaro et al (2010 and Singh et al (2010).…”

Section: Resultssupporting

confidence: 93%

Combining Ability and Heterosis for Polygenic Characters in Maize (Zea mays L.)

J¹,

R²

2012

MAJ

View full text Add to dashboard Cite

Combining ability analysis was conducted using line x tester design in maize inbred lines for yield and yield contributing traits. The sca variance was observed to be more important for all the traits studied. The inbreds DMR-201, CM-119 and CM-121 were good general combiners for grain yield per plant and most of their yield contributing traits. The cross CM-121 x DMR-201 showed high sca effects and heterosis for grain yield and early maturity and thus, can be tested over the locations for assessing its consistent performance over the wide range of environments. Other crosses viz., CM-119 x DMR-40E, CM-104 x AML-420 and CM-119 x DMR- 201 also showed high heterosis and sca effects for grain yield.

show abstract

Section: Resultssupporting

confidence: 93%

Combining Ability and Heterosis for Polygenic Characters in Maize (Zea mays L.)

J¹,

R²

2012

MAJ

View full text Add to dashboard Cite

show abstract

“…Parental genotypes that display high GCA values for specific traits of interest are usually the most suited for integration into breeding programs considering that there would be more transmission of those traits to their offspring because of the additive effects. Crosses with higher SCA values, however, are specifically preferred in the development of hybrid programs ( De la Cruz-Lázaro et al, 2010 ; Ferrari et al, 2018 ). It is therefore recommended that the best performing parental genotypes and families identified through this study be deployed in view of this.…”

Section: Discussionmentioning

confidence: 99%

Combining ability and heritability analysis of sweetpotato weevil resistance, root yield, and dry matter content in sweetpotato

et al. 2022

View full text Add to dashboard Cite

Efficient breeding and selection of superior genotypes requires a comprehensive understanding of the genetics of traits. This study was aimed at establishing the general combining ability (GCA), specific combining ability (SCA), and heritability of sweetpotato weevil (Cylas spp.) resistance, storage root yield, and dry matter content in a sweetpotato multi-parental breeding population. A population of 1,896 F1 clones obtained from an 8 × 8 North Carolina II design cross was evaluated with its parents in the field at two sweetpotato weevil hotspots in Uganda, using an augmented row-column design. Clone roots were further evaluated in three rounds of a no-choice feeding laboratory bioassay. Significant GCA effects for parents and SCA effects for families were observed for most traits and all variance components were highly significant (p ≤ 0.001). Narrow-sense heritability estimates for weevil severity, storage root yield, and dry matter content were 0.35, 0.36, and 0.45, respectively. Parental genotypes with superior GCA for weevil resistance included “Mugande,” NASPOT 5, “Dimbuka-bukulula,” and “Wagabolige.” On the other hand, families that displayed the highest levels of resistance to weevils included “Wagabolige” × NASPOT 10 O, NASPOT 5 × “Dimbuka-bukulula,” “Mugande” × “Dimbuka-bukulula,” and NASPOT 11 × NASPOT 7. The moderate levels of narrow-sense heritability observed for the traits, coupled with the significant GCA and SCA effects, suggest that there is potential for their improvement through conventional breeding via hybridization and progeny selection and advancement. Although selection for weevil resistance may, to some extent, be challenging for breeders, efforts could be boosted through applying genomics-assisted breeding. Superior parents and families identified through this study could be deployed in further research involving the genetic improvement of these traits.

show abstract

“…Among the female parents, 94 GERM and MAC 13, showed potential as good combiners for hydration coefficient, free starch, and splitting. These observations suggest that the male parent, KK8, and female parents (94 GERM and MAC 13) could be strategically utilised in hybridisation programmes aimed at enhancing canning quality traits (Jacinto et al, 2003;De la Cruz-Lázaro et al, 2010;Ferrari et al, 2018). Families, KK8 X NABE 9C, for appearance and seed coat colour retention; SMR-53 X MAC13 for appearance, SMR-53 X 94 GERM for free starch and splitting; and SMR-53 and SMR116 for splitting; which displayed significant SCA for different canning quality traits, could be utilised in hybridisation to improve these traits (De la Cruz-Lázaro et al, 2010;Ferrari et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Baker's ratio (BR), Narrow sense heritability (h 2 ) and Broad sense (H 2 ). The substantial Baker's ratio values for clumping, viscosity, and washed drain weight, alongside moderate values for free starch and hydration coefficient (Table 3), suggest the prevalence of additive genetic effects in influencing these traits (De la Cruz-Lázaro et al, 2010;Ferrari et al, 2018). These outcomes indicate that the genetic value of a cross can be reliably predicted based on the GCA values of the parents, facilitating the selection of parent pairs for generating breeding populations with desired traits.…”

Section: Discussionmentioning

confidence: 99%

Determination of combining ability and heritability for canning quality traits in common bean

Kesiime,

Nkalubo,

Ochwo-Ssemakula

et al. 2024

Afr. Crop Sci. J.

View full text Add to dashboard Cite

Breeding for common bean (Phaseolus vulgaris L.) genotypes with optimal canning quality holds the potential for increased dry bean consumption among middle-class income urban dwellers in sub-Saharan Africa (SSA). Understanding the genetic control of canning quality traits is central for the improvement of common bean genotypes for desired canning quality. The objective of this study was to determine the combining ability and heritability of canning quality traits (CQTs) in common bean; and to establish entry points for effective breeding for these traits. A population from two contrasting parents for canning quality traits was developed and progressed to F2. The F2:F4 seed was evaluated for CQTs at three months post-harvest. Substantial variation was observed among the canning quality traits tested, including the general appearance of the canned beans, seed coat colour retention namely, clumping, free starch, splitting, and hydration coefficient. Canning quality traits encompassed a spectrum of both additive and non-additive effects. Promising combiners for CQTs were identified among the parents, KK8 and MAC 13, suggesting their potential for utilisation in breeding programmes. Moderate to high Baker’s ratio (BR = 0.41-0.94) values were observed for some CQTs and narrow sense heritability (h2 = 0.47-0.66). Canning quality traits exhibited substantial broad sense heritability (H2) values, ranging from 0.6 to 0.92. These findings provide valuable entry points for breeding programmes focused on improving common bean for canning quality.

show abstract

Heterosis and combining ability of tropical maize populations

Cited by 8 publications

References 0 publications

Combining Ability and Heterosis for Polygenic Characters in Maize (Zea mays L.)

Combining Ability and Heterosis for Polygenic Characters in Maize (Zea mays L.)

Combining ability and heritability analysis of sweetpotato weevil resistance, root yield, and dry matter content in sweetpotato

Determination of combining ability and heritability for canning quality traits in common bean

Contact Info

Product

Resources

About