Somatic crossing over in Glycine max L. (Merrill): sensitivity to and saturation of the system at low levels of tritium emitted beta-radiation

1975 ◽  
Vol 46 (7) ◽  
pp. 331-337 ◽  
Author(s):  
B. K. Vig ◽  
J. C. McFarlene
Keyword(s):  
Glycine Max ◽  
Beta Radiation ◽  
Crossing Over ◽  
Glycine Max L ◽  
Low Levels

Studies on the expression of somatic crossing over in Glycine max L.

1970 ◽  
Vol 40 (7) ◽  
pp. 316-321 ◽  
Author(s):  
B. K. Vig ◽  
E. F. Paddock
Keyword(s):  
Glycine Max ◽  
Crossing Over ◽  
Glycine Max L

scholarly journals SOMATIC CROSSING OVER IN GLYCINE MAX (L.) MERRILL: MUTAGENICITY OF SODIUM AZIDE AND LACK OF SYNERGISTIC EFFECT WITH CAFFEINE AND MITOMYCIN C

Genetics ◽  
1973 ◽  
Vol 75 (2) ◽  
pp. 265-277
Author(s):  
B K Vig
Keyword(s):  
Glycine Max ◽  
Mitomycin C ◽  
Point Mutations ◽  
Chromosome Breakage ◽  
Chlorophyll Synthesis ◽  
Crossing Over ◽  
Golden Yellow ◽  
Glycine Max L ◽  
Dark Green ◽  
Light Green

ABSTRACT Glycine max (soybean) is one angiosperm which lends itself to the study of somatic crossing over. This is made possible because some varieties have gene combinations Y11Y11, Y11y11 and y11y11 in the segregating populations from Y11y11 plants. The gene in question is responsible for chlorophyll synthesis. The Y11Y11 plants have dark green leaves, Y11y11 are light green and y11y11 plants are golden yellow. The heterozygous plants have dark green, yellow and dark green-yellow (double) spots on the leaves of the untreated control material, whereas the two homozygotes are almost always devoid of somatic sectoring. Application of caffeine, or mitomycin C, to the seeds increased the frequency of double, dark green and yellow spots on the Y11y11 background. Possibly, some dark green or yellow spots originate by failure of one of the two components of what might start as a double spot due to somatic crossing over. The application of NaN3 increases the frequency of dark green or yellow spots, almost exclusively. The two spots increase in equal frequency. The y11y11 plants so treated do not have any light green sectors, but dark green, Y11Y11, plants do develop a few light green or very dark green spots. The data indicate that NaN3 is capable of inducing nondisjunction, but does not cause mutations (at this locus), chromosome fragmentations (segmental losses) or somatic crossing over to an appreciable degree. It has previously been shown that caffeine-induced chromosome rejoining in Vicia faba can be inhibited by treating the roots with NaN3. In the present experiments NaN3 did not affect the processes of somatic crossing over as induced by caffeine or mitomycin C. The effect was additive. This system offers advantages for studying chemical mutagens in that somatic crossing over, point mutations, segmental losses through chromosome breakage and nondisjunction can all be studied in a single treatment to the seeds.

scholarly journals Selection of progenitors for increase in oil content in soybean

Revista CERES ◽  
2016 ◽  
Vol 63 (5) ◽  
pp. 661-667 ◽  
Author(s):  
Josiane Isabela da Silva Rodrigues ◽  
Klever Márcio Antunes Arruda ◽  
Newton Deniz Piovesan ◽  
Everaldo Gonçalves de Barros ◽  
Maurilio Alves Moreira
Keyword(s):  
Genetic Diversity ◽  
Glycine Max ◽  
Genetic Distance ◽  
Oil Content ◽  
Infrared Spectrometry ◽  
Low Genetic Diversity ◽  
Soybean Genotypes ◽  
Glycine Max L ◽  
Low Levels ◽  
Selection Of

ABSTRACT The low genetic diversity brings limitation to breeding, because genetically similar genotypes share alleles in common, causing little complementarity and low vigor due to the low levels of heterozygosity in crosses. The objective of this work was to analyze the oil content and genetic diversity of soybean genotypes (Glycine max (L.) Merrill) based on QTL regions of this trait for choice of progenitors for increase in oil content. Twenty-two genotypes with wide variation in oil content, including cultivars with high oil contents, were cultivated in different Brazilian conditions and the oil content of the grains was quantified by infrared spectrometry. Microsatellite markers selected based on QTL regions for oil content in soybean were analyzed to estimate the genetic diversity. In these studies, a wide variation in oil content (17.28-23.01%) and a reasonable diversity among the genotypes were observed, being PI181544 the most divergent genotype, followed by Suprema. The genotypes PI371610/Suprema and Suprema/CD01RR8384 showed genetic distance and higher oil contents in the grains, while the cultivars Suprema and CD01RR8384 had the highest oil contents and proved to be little genetically related. These genotypes are promising progenitors for selection of high oil content in soybean.

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