Inheritance of late flowering in natural variants of soybean cultivars under short-day conditions

Soybean (Glycine max) is the most important dicot crop worldwide, and is increasingly used as a model legume due to the wide availability of genomic soybean resources; however, the slow generation times of soybean plants are currently a major hindrance to research. Here, we demonstrate a method for accelerating soybean breeding in compact growth chambers, which greatly shortens the generation time of the plants and accelerates breeding and research projects. Our breeding method utilizes commonly used fluorescent lamps (220 µmol m-2 s-1 at the canopy level), a 14-h light (30 °C)/10-h dark (25 °C) cycle, and carbon dioxide (CO2) supplementation over 400 ppm. Using this approach, the generation time of the best-characterized elite Japanese soybean cultivar, Enrei, was shortened from 102-132 reported in the field to just 70 days, thereby allowing up to 5 generations per year instead of the 1-2 generations currently possible in the field and/or greenhouse. The method also facilitates the highly efficient and controlled crossing of soybean plants. Our method uses CO2 supplementation to promote the growth and yield of plants, appropriate light and temperature conditions to reduce the days to flowering, and the reaping and sowing of immature seeds to greatly shorten the reproductive period. Thus, the appropriate parameters enable to accelerate soybean breeding in the compact growth chambers commonly used for laboratory research. The parameters used in our method could therefore be optimized for other species, cultivars, accessions, and experimental designs to facilitate rapid breeding in a wide range of crops.

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“…2018) (Supplementary Fig. S5), and also decreased from 33–44 to 30.4 � 0.9 d in BR16 (Carpentieri-Pipolo et�al. 2014).…”

Section: Resultsmentioning

confidence: 92%

Accelerating Soybean Breeding in a CO2-Supplemented Growth Chamber

Nagatoshi

Fujita

2018

Plant and Cell Physiology

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“…The source of long juvenility was from the original PI 159925 and NIPs differed only at juvenility loci, and a single recessive allele ( J/j ) conferred this trait. Similarly, a single recessive locus controlling long juvenile trait was concluded by Villarroel and Kilen (2009), Tisseli (1981), Carpentieri‐Pipolo et al., (2014) and Gupta et al. (2021).…”

Section: Introductionmentioning

confidence: 59%

Long juvenility trait: A vehicle for commercial utilization of soybean (Glycine max) in lower latitudes

et al. 2021

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Soybean, a short‐day plant, has its origin in higher latitudes of China, and its commercial cultivation remained confined to areas >22°N till 1970s due to precocious flowering accompanied with reduced biomass in lower latitudes. This review summarizes the effect of short days on soybean phenology, discovery of a novel long juvenile (LJ) trait, its role in breaking the latitudinal boundary for soybean production, identification of genes and impact of LJ trait on world soybean production. E6, J and E9 major genes governing the trait have been characterized and cloned. LJ varieties are late in flowering and maturity and successful in long rainfall regime of Brazil. Availability of vast vacant fallows of Cerrado has been another factor for utilization of this trait in Brazil. Recent advances for developing short‐duration LJ varieties, for limited rainfall areas and its suitability to existing cropping systems by combining it with photoinsensitivity, have been reviewed. Based on the available data from lower latitudes of Brazil, the contribution of the LJ trait is estimated to 23.7% of the total world production.

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“…The presence of genetic variability is determinant for the continuity of studies on inheritance. However, notably, understanding of character inheritance seems to be restricted to univariate analyzes (BERTAN et al, 2009;VALENTINI et al, 2011;CARPENTIERI-PIPOLO et al, 2014). Most characters of agronomic interest are ruled by numerous pairs of alleles, so that the study of a single character is already very complex.…”

Section: Resultsmentioning

confidence: 99%

Predominant trait inheritance in wheat with multivariate approach

et al. 2017

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The objective of this study was to analize the inheritance of characters in wheat using multivariate analysis of variance. Sixteen genetic constitutions were evaluated between commercial cultivars and progenies F1 and F2. Treatments were arranged in completely randomized blocks, with three replicates. Five characters were evaluated. Multivariate analysis of variance and multivariate contrasts were then performed to test the hypotheses. The significant differences, obtained for comparison between parents and progenies F1, may be evidence of heterosis occurrence. However, only comparisons between progenies P1_P3 (F1) vs. P1_P3 (F2) and P4_P2 (F1) vs. P4_P2 (F2) showed significant differences. Multivariate analysis of variance revealed that inheritance of the characters studied is predominantly of the additive type. It is possible that, this occurred due to the degree of relationship between parents who reunited identical alleles at the same locus, by ancestry, as a result of inbreeding effects. The knowledge of additive inheritance may represent a faster incorporation of resistance or quality characteristics in new cultivars.

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Inheritance of late flowering in natural variants of soybean cultivars under short-day conditions

Cited by 7 publications

References 11 publications

Accelerating Soybean Breeding in a CO2-Supplemented Growth Chamber

Accelerating Soybean Breeding in a CO2-Supplemented Growth Chamber

Long juvenility trait: A vehicle for commercial utilization of soybean (Glycine max) in lower latitudes

Predominant trait inheritance in wheat with multivariate approach

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