Association Between Chemical Composition of Seed and Seed Yield of Soybeans<sup>1</sup>

Hartwig, E. E.; Hinson, Kuell

doi:10.2135/cropsci1972.0011183x001200060034x

Cited by 54 publications

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“…However, it has been found in Vicia faba [12], Phaseolus vulgaris [13] and soybean [14] that the negative correlation can be changed through breeding, and it has been possible to identify exceptional genotypes in segregating generations that appeared more efficient than expected in their protein synthesis.…”

Section: Resultsmentioning

confidence: 99%

Relationship between seed size and protein content in newly developed high protein lines of pigeonpea

Saxena

Faris

Singh

et al. 1987

Plant Food Hum Nutr

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To develop high protein lines, several crosses were made between Cajanus as a source of acceptable seed size and Atylosia as a source of high protein. In the present study, 1974 single F7 plants from these intergeneric crosses were examined. Correlation coefficients among these crosses between seed size and seed protein content ranged from -0.30, (P < 0.01) to +0.28 (P < 0.01). Two crosses had significant negative correlations and one showed a significant positive correlation while in the remaining two no significant association was detected. Based on all the selections there was a highly significant negative correlation (-0.13, P < 0.01) between seed size and protein content. However, the extent of variation that could be attributed to this association was small. Observations indicated that in pigeonpea, unlike other legume and cereal crops, simultaneous improvement can be made for seed size and protein. Some high protein lines (HPL 2, HPL 7, HPL 40, and HPL 51) have been identified. Protein content of these lines ranged between 27.0 and 29.0% and 100-grain weight between 10.0 and I2.1 g.

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Section: Resultsmentioning

confidence: 99%

Relationship between seed size and protein content in newly developed high protein lines of pigeonpea

Saxena

Faris

Singh

et al. 1987

Plant Food Hum Nutr

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“…In general, protein content is inversely related to yield (Brim & Burton 1979). Negative correlations are also often observed between soya bean oil or carbohydrate and protein content (Serretti et al 1994) Backcrossing, a plant breeding approach used to introgress simply inherited traits into a designated parent, has been used with limited success to improve the protein concentration of seeds (Hartwig & Hinson 1972;Wehrman et al 1987). A recent example of this approach is reported by Wilcox and Cavins (1995).…”

Section: Variation In Total Seed Protein Compositionmentioning

confidence: 99%

Developments in plant breeding for improved nutritional quality of soya beans I. Protein and amino acid content

Clarke

Wiseman

2000

J. Agric. Sci.

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Soya beans, like other legumes, contain low concentrations of the nutritionally essential sulphur amino acid, methionine. Cysteine, although not an essential amino acid because it can be synthesized from methionine, also influences the nutritional quality of soya bean products when it is only present in low levels. A low cysteine content will also aggravate a methionine deficiency. Soya bean lines deficient in 7S protein subunits have been identified. The 7S proteins contain substantially less methionine and cysteine than the 11S proteins. With the myriad of genetic null alleles for these subunits it may be possible to tailor the 7S/11S storage protein ratio and their total composition in seeds to include only those subunits with the richest sulphur amino acid composition. Cotyledon feeding experiments, using isolated soya bean cotyledons, demonstrated that addition of methionine to the culture media caused increased synthesis of both proteins and free amino acids but the mechanism by which this takes place is not clear. Biotechnological approaches to improve nutritional value of soya beans include elevated expression of genes that originate from other species which encode high-sulphur proteins. High level expression of a 2S Brazil nut albumin gene in soya bean resulted in raised methionine concentration although the Brazil nut gene is highly antigenic and therefore will not be useful in production agriculture. Modification of glycinin to increase sulphur amino acid content is possible, and these gene products are capable of normal assembly into trimers in vitro although are rapidly degraded in vivo by the asparaginyl endopeptidase responsible for post-translational modification of proglycinin. Solutions to the methionine deficiency may be anticipated from a combination of approaches followed in laboratories worldwide. Many of these approaches are not without difficulty but, despite this, the likelihood is that soya beans with improved nutritional quality (which may not be confined to sulphur-containing amino acids as other nutritionally essential amino acids are also valuable) will be available in the near future. It will be essential to confirm that the increased total methionine (or other amino acid) is digestible to the animal to at least the same degree as conventional cultivars.

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“…O rendimento de grãos de soja, em geral, é inversamente correlacionado com o teor de proteína nos grãos (Johnson et al, 1955;Kwon & Torrie, 1964;Byth et al, 1969aByth et al, , 1969bThorne & Fehr, 1970;Hartwig & Hinson, 1972;Hymowitz et al, 1972;Shannon et al, 1972;Voldeng et al, 1997;Wilcox & Guodong, 1997). Segundo Burton (1984), correlações negativas entre rendimento de grãos e teor de proteína, apesar de freqüentes, usualmente não são expressivas.…”

Section: Introductionunclassified

Teor de óleo e de proteína em genótipos de soja desenvolvidos após 1990

Bonato

Bertagnolli

Lange³

et al. 2000

Pesq. agropec. bras.

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RESUMO -O objetivo deste trabalho foi verificar se as cultivares de soja lançadas após 1990 para o Estado do Rio Grande do Sul continham, nos grãos, teores de proteína e de óleo diferentes dos contidos nos grãos das cultivares em uso anteriormente a esse ano. Na safra de 1996/97, foi realizado um estudo envolvendo genótipos produzidos em três locais do Rio Grande do Sul. O teor de óleo foi determinado pelo método de Soxlet, e o de proteína, pelo método de Kjeldahl. A maior parte das cultivares lançadas entre 1991 e 1996 apresentou menor teor de proteína e maior teor de óleo do que as mais antigas. A utilização das cultivares União e Industrial como genitores deve ter contribuído para o menor teor de proteína apresentado pelas cultivares. As linhagens experimentais apresentaram teor de proteína tão elevado quanto o das cultivares em cultivo desde antes de 1990, o que pode ter sido causado pela mudança de genitores. As correlações fenotípicas indicaram que existe uma associação negativa significativa somente entre os teores de óleo e de proteína.Termos para indexação: Glycine max, correlação genética, composição química. OIL AND PROTEIN CONTENT IN SOYBEAN GENOTYPES DEVELOPED AFTER 1990ABSTRACT -The objective of this work was to investigate whether oil and protein contents of soybean cultivars released after 1990 for the State of Rio Grande do Sul, Brazil, differ from the contents found in cultivars in use before that year. A study was carried out in 1996/97 involving cultivars recommended at different periods, produced at three sites of that state. Oil content was determined by the Soxlet method, and protein content was determined by the Kjeldahl method. It was found that most cultivars released between 1991 and 1996 showed lower protein content and higher oil content than older cultivars. The use of the União and Industrial cultivars as parents should be one of the main reasons to the lower protein content in these cultivars. The change of parents provided a recuperation in the protein content of new lines up to the level found in the cultivars released before 1990. Phenotypical correlations indicated that there is a significant negative association between oil and protein contents only.

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Association Between Chemical Composition of Seed and Seed Yield of Soybeans¹

Cited by 54 publications

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Relationship between seed size and protein content in newly developed high protein lines of pigeonpea

Relationship between seed size and protein content in newly developed high protein lines of pigeonpea

Developments in plant breeding for improved nutritional quality of soya beans I. Protein and amino acid content

Teor de óleo e de proteína em genótipos de soja desenvolvidos após 1990

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Association Between Chemical Composition of Seed and Seed Yield of Soybeans1

Cited by 54 publications

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Relationship between seed size and protein content in newly developed high protein lines of pigeonpea

Relationship between seed size and protein content in newly developed high protein lines of pigeonpea

Developments in plant breeding for improved nutritional quality of soya beans I. Protein and amino acid content

Teor de óleo e de proteína em genótipos de soja desenvolvidos após 1990

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Association Between Chemical Composition of Seed and Seed Yield of Soybeans¹