Partial diallel and potential of super sweet corn inbred lines bt 2 to obtain hybrids

Xavier, Larissa Fernanda Sega; Pestana, Jéssica Kelly; Sekiya, Alline; Krause, Matheus Dalsente; Moreira, Rosângela Maria Pinto; Ferreira, Josué Maldonado

doi:10.1590/s0102-053620190305

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Other mutants used in sweet corn have diverse viability problems. Xavier et al [30] studied the potential of supersweet corn inbreds based on brittle2 (bt2) for commercial varieties. General combining ability and specific combining ability were significant, and there were some hybrids with superior performance that could be included in a breeding program for increasing grain productivity, large ear diameters, and long ears.…”

Section: Endosperm Loci That Affect Qualitymentioning

confidence: 99%

Sweet Corn Research around the World 2015–2020

2021

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Modern sweet corn is distinguished from other vegetable corns by the presence of one or more recessive alleles within the maize endosperm starch synthesis pathway. This results in reduced starch content and increased sugar concentration when consumed fresh. Fresh sweet corn originated in the USA and has since been introduced in countries around the World with increasing popularity as a favored vegetable choice. Several reviews have been published recently on endosperm genetics, breeding, and physiology that focus on the basic biology and uses in the US. However, new questions concerning sustainability, environmental care, and climate change, along with the introduction of sweet corn in other countries have produced a variety of new uses and research activities. This review is a summary of the sweet corn research published during the five years preceding 2021.

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Section: Endosperm Loci That Affect Qualitymentioning

confidence: 99%

Sweet Corn Research around the World 2015–2020

2021

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“…In this sense, based on the hypothesis of this study, variability in the GCA, SCA and GCA/SCA values was observed in relation to the characteristics of the corn seedling and adult plant (Tables 1 and 2). which presents a contrast to other similar studies [11] that found a higher GCA/SCA correlation with LM, with the exception of TBWS [46]. In this regard, [7] point out that when detecting greater effects in the GCA, it is feasible to exploit the additive proportion of genetic variance through recurrent selection; on the contrary, in crosses where there is a higher SCA, a recurring reciprocal or hybridization selection program may be implemented.…”

Section: Discussionmentioning

confidence: 63%

Genetic Parameters in Mesocotyl Elongation and Principal Components for Corn in High Valleys, Mexico

Villalobos-González,

Benítez-Riquelme,

Castillo-González

et al. 2024

Seeds

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Corn germplasm with different mesocotyl elongation was characterized for High Valleys in Mexico by estimating the general combinatory aptitude (GCA), specific combinatory aptitude (SCA), heterosis (H), inbreeding depression (ID) and principal component aptitude (PCA), with the purpose of directing the improvement for deep sowing. The hypothesis was that the parents and crosses of mesocotyl present variability in seedling and adult plant traits based on deep sowing. The 36 F1 and F2 crosses—derived from nine parents, three with short mesocotyl (S), three medium (M) and three long (L), obtained through Griffing diallel II—plus the parents were planted in sand beds and polyethylene bags in a greenhouse during the spring–summer cycles of 2021 and 2022. The following traits were measured: length of mesocotyl (LM), length of coleoptile, total seedling dry matter and 10 cob traits in addition to total dry matter. In 11 of the 14 traits, there was a positive and significant correlation (p ≤ 0.05) between the GCA of the parents and their LM. The highest SCA, H and ID (p ≤ 0.05) were for crosses L × L for all the traits measured. When comparing the GCA/SCA proportions, this relation varied from 0.76 to 0.97, which points to practically equal additive effects with those of dominance; however, in parents and L × L crosses, this relation was on average 0.94, 1.07 in M × M, 0.22 in S × S and 0.36 in L × S. In both F1 and F2, the variation was explained by two principal components: 89.5% for GCA and 73.4% for SCA. In both generations, the parents with higher GCA were H-48, HS-2 and Promesa, the three with long mesocotyl, while those with the highest GCA were crosses between these three hybrids.

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Agronomic performance of experimental super sweet corn hybrids

Gava¹,

Faria²,

Zaluski³

et al. 2021

Hortic. Bras.

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Super sweet is classified as a special type of corn, due to the presence of genes which promote sugar accumulation in grains, significantly reducing starch content in the endosperm. This study aimed to evaluate the agronomic performance of experimental super sweet corn hybrids, carrying the gene shrunken-2, in order to identify and select promising genotypes for Southern Brazil. The experiments were carried out in two sowing seasons in 2017/18, in the experimental field of UNICENTRO, Guarapuava-PR, Brazil. Thirty-two experimental hybrids resulting from an 8x4 partial diallel among super sweet corn inbred lines from four distinct populations were evaluated along with two commercial hybrids (BRS Vivi and Tropical Plus) used as checks. Traits of agronomic and commercial interest were evaluated: male flowering (MF), husk covering index (HCI), yield of husked ears (YHE), grain yield (GY), commercial prolificacy (CPR), percentage of commercial ears (PCE), color (COL) and soluble solids (SS) of the grains. We verified significant differences among the experimental hybrids, except for COL. There was no significant effect of sowing season regarding to SS. Genotypes x seasons interaction was significant for YHE, GY, CPR, PCE and COL. There are promising experimental hybrids showing performances superior to commercial super sweet corn hybrids used in Brazil. The experimental hybrids D2-61 x D5-41 and D3-10 x D5-43 were superior to the other experimental genotypes. The experimental hybrid D2-61 x D5-41 shows potential to meet the demands of the current super sweet corn market.

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Partial diallel and potential of super sweet corn inbred lines bt 2 to obtain hybrids

Cited by 4 publications

References 14 publications

Sweet Corn Research around the World 2015–2020

Sweet Corn Research around the World 2015–2020

Genetic Parameters in Mesocotyl Elongation and Principal Components for Corn in High Valleys, Mexico

Agronomic performance of experimental super sweet corn hybrids

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