Genetische Versuche mitCollinsia bicolor I

Hiorth, Gunnar Eilert

doi:10.1007/bf01858206

Cited by 4 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Appearance of the band varied considerably among plants, indicating influence of modifying genes. The previously described Kn gene (Hiorth 1930;Goršič 1957) is probably equivalent to the gene coding for the band (see Weil and Allard 1964). On the other hand, the connection between the Kn gene and the other gene for colour, O, as found by Goršič (1957) is not in accordance with my results.…”

Section: Discussioncontrasting

confidence: 55%

“…Older studies suggest that presence of colour (independent of presence of a band) on the upper lip of C. heterophylla is determined by a gene for carmine, Kn (Hiorth 1930) and by two other genes of which one is closely linked with Kn (Goršič 1957). A common feature in these older studies is that crosses were made between distant populations, because the aim was rather to determine inheritance of traits deviating from the 'normal' type than investigating the genetic basis of variation between closely occurring populations or within a polymorphic population.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Upper petal lip colour polymorphism in Collinsia heterophylla (Plantaginaceae): genetic basis within a population and its use as a genetic marker

Lankinen

2009

J Genet

View full text Add to dashboard Cite

Understanding the genetics of a polymorphic trait is important to predict its likely evolution. In Collinsia heterophylla, the upper petal lip colour can be either be white or white with a purple band, while the lower petal lip colour is invariably purple. Because the corolla is only partly polymorphic, the polymorphism can not have evolved due to a mutation where a pigment was lost in the entire plant, which is common in other polymorphic species. In a previous study, high frequency of the purple band was found in populations with darker flowers, indicating possible selection for this trait. In this study, I determined inheritance of the colour polymorphism using two populations (one with only white morph and other with both morphs). I conducted experimental crosses within and between floral morphs to determine whether patterns of segregation in offspring conform to single-gene predictions. Data from F1, F2, F3 and backcross progeny are consistent with a genetic model of one major locus with presence of the band being completely dominant, as indicated in earlier studies using distantly related populations. A novel finding in this study was that the two morphs did not show a difference in seed germination frequency or seedling survival. This trait can thus be valuable as a genetic marker. Even though more thorough ecological data are needed to understand the potential selection pressures on upper petal lip colour in C. heterophylla, its simple inheritance may indicate the possibility of fast evolutionary response to selective forces acting on this trait.

show abstract

Section: Discussioncontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Upper petal lip colour polymorphism in Collinsia heterophylla (Plantaginaceae): genetic basis within a population and its use as a genetic marker

Lankinen

2009

J Genet

View full text Add to dashboard Cite

show abstract

“…ThIS raises the possibility that maternal effects due to bagging contributed to the observed depression. However, since Hiorth (1930) and Bell and Garber (1961) have reported moderate inbreeding depression in this species it is unlikely that all of the depression observed in this study is associated with bagging.…”

Section: Resultsmentioning

confidence: 66%

“…In the course of the genetic investigations of Carmine and Red Flush, the observation of Hiorth (1930) that there is no self-incompatibility in C. heterophylla was corroborated. It was observed, however, that in the absence of insect vectors and manual pollination seed set was often poor.…”

Section: Resultsmentioning

confidence: 95%

Untitled

1964

Evolution

View full text Add to dashboard Cite

There is now a large body of evidence which indicates that populations of plants and animals contain great amounts of genetic variability (e.g., Dempster, 1955;Dobzhansky, 1955), and the elucidation of the factors which maintain this variability within populations is one of the main problems confronting population genetics today (e.g., Allard and Jain, 1962;Dobzhansky, Spassky, and Tidwell, 1963;Wallace, 1963). One requirement for the solution of this problem is adequate data concerning the magnitude and nature of the genetic variability contained within populations. However, despite the extensive work which has been done in plant evolution and plant population genetics, there appear to be no precise estimates for quantitative characters of the genetic variability within individual populations of any naturally occurring plant species.The most extensive data concerning quantitative variability within individual natural plant populations appear to be those of Baker (1957) for Geranium purpureum. From experimental field plantings made over several years, Baker determined between plant phenotypic variance for several 1

show abstract

Genetische Versuche mitCollinsia IV. Die Analyse eines nahezu sterilen Artbastardes

Hiorth¹

1934

Z.Ver-erbungslehre

View full text Add to dashboard Cite

G e n e t i s c h e V e r s u c h e mit CoUinsia IV. Die A n a l y s e eines n a h e z u sterilen Artb a s t a r d e sGenetische Versuche mit Collinsia IV. Die Analyse eines nahezu steril. Artbast. 107C. bartsiae/olia unterscheiden sich unter anderem in folgenden Eigenschaften: C. bicolor: Samenzahl pro Kapsel 10--15; Samen groin. Blfiten gro•, meist mit kr~tftigen violetten Linien im Sehlund. Unterlippe violett.C. bartsiaefolia: Samenzahl pro Kapsel ca. 30; Samen sehr klein. Blfiten klein. Basis der Lappen der Unterlippe weiB; Unterlippe sonst ]ila, mit dunkleren Adernl Violette Linien im Schlund sehr schwach; die violette Linie an der Basis der Lappen der Unterlippe v611ig fehlend. Pflanzen viel kleiner als bicolor.Aul~erdem ist die Form, die Dicke und der Farbton der Bl~ttter beider Arten verschieden; vergleiche auch den Namen bartsiae{olia. Es macht keine Schwierigkeiten, die beiden Arten auseinanderzuhalten; dagegen ist es nicht leicht, alle ihre Unterschiede in Worte zu fassen. Die Chromosomenzahl beider Arten ist die gleiche, n = 7.Die Fertiliti~t bei Selbstungen oder Kreuzungen werden wir im folgenden dutch die Samenzahl pro Pflanze charakterisieren. Von jeder Pflanze wurden in der Regel 20--25 Bltiten des Hauptstengelszur Samen-. gewinnung benutzt; die allerobersten Blfiten wurden entfernt. Eine normale bicolor-Pflanze gibt dann (bei Kultur in elektrischem Licht) durchschnittlich 255 Samen, die etwa 250 Siimlinge liefern (Keimfahigkeit 98 %). In Inzuchtslinien ist sowohl die Anzahl tier Samen als auch die Keimflihigkeit geringer. --Bei den gleich erw~hnten P1-Artskreuzungen wurden weniger Bltiten pro Pflanze best~iubt, weshalb die Bititenzahlen in diesen Fallen besonders angegeben werden.Im Jahre 1929 wurde eine. Reihe yon Kreuzungen zwischen C. bicolor und C. bartsiaefolia vorgenommen. Die Kreuzung gelang in beiden Richtungen, wenn aueh der Samenansatz nur ein Bruchteil des normalen war. Im Jahre 1931 wurden die Artskreuzungen in gr6~erem Umfang wiederholt, wobei zahlreiche bicolor-Rassen benutzt wurden. Die Kreuzung bartsiae[olia ~ × bicolor 3 gelang in diesem Jahre besonders sehleeht. Ca. 1100 Bltiten yon 60 Pflanzen gaben zusammen nur 15 keimfahige Samen; diese stammten aber alle yon einer einzigen Pflanze, die mit Pollen tier zz-Rasse yon bicolor best~ubt waren. Die betreffende Pflanze war zuffillig stark durch Schwefelpulver beschiidigt worden. 5 unverletzte Geschwister, die mit der gleichen bicolor-Rasse bestaubt waren, setzten keinen Samen an. --DaB diese Artskreuzung im Jahre 1931 noch schlechter gelang als in 1929, k(innte darauf beruhen, da~ zu dem spateren Zeitpunkt Inzuchtslinien yon bicolor benutzt wurden.

show abstract

Genetische Versuche mitCollinsia bicolor I

Cited by 4 publications

References 2 publications

Upper petal lip colour polymorphism in Collinsia heterophylla (Plantaginaceae): genetic basis within a population and its use as a genetic marker

Upper petal lip colour polymorphism in Collinsia heterophylla (Plantaginaceae): genetic basis within a population and its use as a genetic marker

Untitled

Genetische Versuche mitCollinsia IV. Die Analyse eines nahezu sterilen Artbastardes

Contact Info

Product

Resources

About