Seasonal Variation of Tropical Savanna Altered Agronomic Adaptation of Stock-6-Derived Inducer Lines

Sintanaparadee, Paepan; Dermail, Abil; Lübberstedt, Thomas; Lertrat, Kamol; Chankaew, Sompong; Ruanjaichon, Vinitchan; Phakamas, Nittaya; Suriharn, Bhalang

doi:10.3390/plants11212902

Cited by 5 publications

(10 citation statements)

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“…In our study, the significant effects of season and the interaction between season and genotype (G × S) for most traits observed suggest seasonal variation in TS climate and a crossover performance of haploid inducer genotypes between the rainy and dry seasons for agronomic traits and haploid induction ability. Sintanaparadee et al (2022) examined the effects of seasonal variation in TS of Thailand and suggested that haploid induction in the dry season would be more Both season × GCA and season × SCA interactions were significant, indicating that performing hybrid formation and testing in a single environment might mislead the genotype selection. In maize and vegetable corn, hybrid evaluation through combining ability studies in TS of Thailand should be carried out in at least two different growing seasons to improve the accuracy of selection (Dermail et al, 2020;Fuengtee et al, 2020;Dermail et al, 2022;Ja et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…In the TS of Thailand, the rainy season is characterized by higher temperature, precipitation rate, relative humidity, and longer photoperiod, while the dry season is identified by lower temperature and relative humidity, a lack of rainfall, and shorter photoperiod ( Janket et al., 2018 ; Sintanaparadee et al., 2022 ). In our study, the significant effects of season and the interaction between season and genotype (G × S) for most traits observed suggest seasonal variation in TS climate and a crossover performance of haploid inducer genotypes between the rainy and dry seasons for agronomic traits and haploid induction ability.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Combining ability of tropical × temperate maize inducers for haploid induction rate, R1-nj seed set, and agronomic traits

et al. 2023

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In vivo maternal haploid induction in isolation fields is proposed to bypass the workload and resource constraints existing in haploid induction nurseries. A better understanding of combining ability and gene action conditioning traits related to hybrid inducers is necessary to set the breeding strategy including to what extent parent-based hybrid prediction is feasible. This study aimed to evaluate the following in tropical savanna in the rainy and dry seasons for haploid induction rate (HIR), R1-nj seed set, and agronomic traits: 1) combining ability, line per se, and hybrid performance of three genetic pools; 2) genetic parameters, the modes of gene action, and heterosis; and 3) the relationships of inbred–general combining ability (GCA) and inbred–hybrid performance. Fifty-six diallel crosses derived from eight maize genotypes were evaluated in the rainy season of 2021 and the dry season of 2021/2022. Reciprocal cross effects including the maternal effect barely contributed to the genotypic variance for each trait observed. HIR, R1-nj seed set, flowering dates, and ear position were highly heritable and additive inherited, while ear length showed dominant inheritance. The equal importance of additive and dominance effects was found for yield-related traits. Temperate inducer BHI306 was the best general combiner for the HIR and R1-nj seed set, followed by two tropical inducers, KHI47 and KHI54. The ranges of heterosis were trait-dependent and slightly influenced by the environment, where hybrids in the rainy season consistently had higher heterosis than those in the dry season for each trait observed. Both hybrid groups derived from tropical × tropical and tropical × temperate inducers showed taller plants, larger ear size, and higher seed sets than the corresponding parents. However, their HIRs were still below the standard check of BHI306. The implications of genetic information, combining ability, and inbred–GCA and inbred–hybrid relationships on breeding strategies are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Combining ability of tropical × temperate maize inducers for haploid induction rate, R1-nj seed set, and agronomic traits

et al. 2023

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“…In tropical savanna Thailand, however, the common G × E variation for agronomic traits and yields in field corn and vegetable corn was two-way interaction between genotype and season (Dermail et al 2020;Fuengtee et al 2020;Dermail et al 2022;Ja et al 2022;Dermail et al 2023). Under a tropical savanna climate, the dry season was more suitable for corn growth and development to obtain a better seed set than the rainy season (Sintanaparadee et al 2022). They noticed the dry season had lower daily minimum and maximum temperatures, relative humidity, and total rainfall but higher solar radiation and longer photoperiod per day.…”

Section: Analysis Of Variance and The Minor Importance Of Reciprocal ...mentioning

confidence: 99%

“…However, none of the above studies reported on the impact of reciprocal crosses in waxy genetic background, focusing on yields, yield components, and agronomic traits. Furthermore, Thailand is a tropical savanna where seasonal variations often alter corn performance under yield trials (Sintanaparadee et al 2022). While this effect may also affect the magnitudes of reciprocal cross effects, information on the stability of reciprocal effects over different growing seasons is lacking.…”

Section: Introductionmentioning

confidence: 99%

Reciprocal cross effect over seasons on agronomic and yield traits in waxy corn under tropical savanna

SAWANGHA,

DERMAIL,

CHANKAEW

et al. 2023

Biodiversitas

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Abstract. Sawangha M, Dermail A, Chankaew S, Simla S, Lertrat K, Suriharn K. 2023. Reciprocal cross effect over seasons on agronomic and yield traits in waxy corn under tropical savanna. Biodiversitas 24: 4120-4125. The exponentially increasing number of hybrids per additional inbred lines results in a tremendous workload in crop hybrid breeding. The question arises if reciprocal crosses could be excluded in waxy corn hybrids to reduce the workload by up to 50%. In this study, we aimed to assess the importance of reciprocal cross effects for yields, yield components, and agronomic traits of sweet-waxy corn F1hybrids and to validate the stability of those effects over seasons. Five parental lines, comprised of one sweet corn inbred line and four waxy corn inbred lines, were mated through a top cross scheme to generate eight F1progenies, including the reciprocals. All genotypes, including checks, were arranged in a Randomized Complete Block Design (RCBD) with three replications in the dry season of 2021/2022 and the rainy season of 2022 in Khon Kaen, Thailand. Genotype was significant for all observed traits, and the interaction between genotype and season was significant for all traits. The reciprocal cross-effect was non-significant for most observed traits. The non-significance of the interaction between N vs. R and season confirmed the absence of reciprocal cross effects in different growing seasons. Thus, dissecting one of two possibilities in each cross combination is advisable for affordable hybrid formations. Considering the absence of reciprocal cross effects but significant G × E effect for given traits, allocating more efforts and resources for conducting multi-environment trials is advisable to reduce the gap between actual and potential yields of testing hybrids.

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Stratified haploid identification system through the R1-nj kernel and reduced seedling vigor in tropical maize germplasm

THAWARORIT,

DERMAIL,

LERTRAT

et al. 2023

Biodiversitas

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Abstract. Thawarorit A, Dermail A, Lertrat K, Chankaew S, Suriharn K. 2023. Stratified haploid identification system through the R1-nj kernel and reduced seedling vigor in tropical maize germplasm. Biodiversitas 24: 4262-4268. Haploid identification through the R1-nj marker is commonly applied in in-vivo doubled haploid technology in maize, although misclassification issues often occur. We explored the innate properties of maternal haploids at the seedling stage to verify true haploids and to reduce false positives. There are many questions about whether reduced seedling vigor is effective for haploid verification in tropical maize backgrounds. This study aimed to evaluate the haploid induction rate of Stock6-derived F3 population inducers and to investigate the effectiveness of reduced seedling vigor at the V2/V3stage as an alternative marker to verify putative haploids. Field trials and haploid induction were conducted in the rainy season of 2021 and the dry season of 2021/22 in Khon Kaen, Thailand. Two tropical source germplasm: P789 and S7328, were included as donor females. Haploids were identified through the R1-nj marker and reduced seedling vigor. Significant reduction of haploid frequency up to 2.5% on average between the two identification methods, indicating that a considerable number of false positives could be found using reduced seedling vigor. Inducer population K11 was promising since it performed a stable ability to produce haploids over donors and seasons and had a low misclassification rate. Further breeding strategies and haploid selection schemes are discussed.

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Seasonal Variation of Tropical Savanna Altered Agronomic Adaptation of Stock-6-Derived Inducer Lines

Cited by 5 publications

References 61 publications

Combining ability of tropical × temperate maize inducers for haploid induction rate, R1-nj seed set, and agronomic traits

Combining ability of tropical × temperate maize inducers for haploid induction rate, R1-nj seed set, and agronomic traits

Reciprocal cross effect over seasons on agronomic and yield traits in waxy corn under tropical savanna

Stratified haploid identification system through the R1-nj kernel and reduced seedling vigor in tropical maize germplasm

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