The Effect of Selection and Inbreeding on the Growth of Big Bluestem (Andropogon Furcatus, Muhl.)<sup>1</sup>

Law, A. G.; Anderson, Kling L.

doi:10.2134/agronj1940.00021962003200120003x

Cited by 23 publications

(24 citation statements)

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“…Overall seed germination and seed set values were low and consistent with reports from midwestern studies (Law and Anderson 1940, Norrmann et al 1997, McKone et al 1998. A self-incompatibility system within those populations most likely explains the low seed germination and seed set values of the selfed treatments and is consistent with reports of a functioning self-incompatibility system in midwestern populations of big bluestem (Norrmann et al 1997).…”

Section: Discussionsupporting

confidence: 85%

“…This phenomenon results in low reported seed set (0.2-6.0%) following self-pollination. Post-zygotic mechanisms are suspected as well due to the low survivability of the offspring beyond the 1st growing season (Law andAnderson 1940, Norrmann et al 1997). Chappell (2003) reported low within-population seed set (0-1%) in 4 small, isolated big bluestem populations in South Carolina.…”

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An Outcrossing Reciprocity Study Between Remnant Big Bluestem (Andropogon gerardii) Populations in the Carolinas

Tompkins¹,

Stringer²,

Bridges³

2011

Ecological Restoration

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During the 2007-08 growing seasons we conducted an outcrossing reciprocity study with ramets from 5 big bluestem (Andropogon gerardii) populations from North and South Carolina. We established 15 treatments each at 4 garden sites. Seed germination was low and not significantly different for outcrossed (4.6%) and selfed (2.4%) treatments. However, germination was significantly higher for both outcrossed and selfed seeds from ramets from the Suther Prairie population. The overall mean percent seed set for the outcrossed treatments was 5.9%, and 3.6% for the selfed treatments. There were no significant differences in seed set (maternal effect) for the 5 populations. In addition, there were no significant differences in parental effect in either seed germination or seed set among the 5 populations. Ramets from the BlackJacks Heritage Preserve population ( paternal) x Suther Prairie population (maternal) and its reciprocal SP x BJ had the highest combined percent seed germination (21.3% and 5.8%, respectively). Ramets from the Suther Prairie population ( paternal) x Buck Creek Serpentine Barren (maternal), and its reciprocal BC x SP, had the highest combined percentage of seed set (22.7% and 9.6%, respectively). Results from this study suggest that viable seed production is low or absent in big bluestem populations in the Carolinas, particularly in smaller populations. We recommend vegetative material or seeds from the Suther Prairie big bluestem population for potential restoration and establishment of local big bluestem populations.

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Section: Discussionsupporting

confidence: 85%

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confidence: 99%

An Outcrossing Reciprocity Study Between Remnant Big Bluestem (Andropogon gerardii) Populations in the Carolinas

Tompkins¹,

Stringer²,

Bridges³

2011

Ecological Restoration

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“…Brown (1943) gave the seed set of native grassPs in mixed prairie. Law and Anderson (1940) found the seed set of big bluestem ranged from zero to 84. Big bluestem producrd no sPed until 1941, then 25 percent of the florets contained caryopses.…”

Section: Discussion Of Findings and Of Related Studiesmentioning

confidence: 99%

Seed Production of Native Grasses under Cultivation in Eastern Kansas

Cornelius¹

1950

Ecological Monographs

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“…It has two common cytotypes, hexaploid (2n ¼ 6x ¼ 60 chromosomes) and enneaploid (2n ¼ 9x ¼ 90 chromosomes). Plants are obligately outcrossing (Law and Anderson, 1940;Norrmann et al, 1997;McKone et al, 1998) and the cytotypes are interfertile (Norrmann et al, 1997;Norrmann and Keeler, 2003). In the eastern tallgrass prairie, enneaploids are rare, but present (Keeler, 1990).…”

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confidence: 99%

Impact of Intraspecific Polyploidy in Andropogon gerardii (Poaceae) Populations

Keeler

2004

The American Midland Naturalist

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ABSTRACT.-Andropogon gerardii populations are comprised of two (or more) polyploid forms over much of the range of the species. To understand the impact of intraspecific polyploidy, polyploid cytotypes were compared over 4 y in native grasslands in Boulder, Colorado. Boulder A. gerardii populations averaged 59.6% hexaploids (60 chromosomes), 35.3% enneaploids (90 chromosomes) and 5.1% intermediate (aneuploid) chromosome numbers using flow cytometry to infer chromosome numbers. Neither mean clone area nor mean annual change in clone area differed significantly between ploidy levels. Hexaploid clones produced significantly more viable seeds than enneaploids. Enneaploids are not replacing themselves, whether that is measured absolutely or relative to hexaploids. Enneaploid reproductive effort was greater than hexaploid reproductive effort in some years and they produce substantial numbers of good seeds, but those seeds rarely have enneaploid cytotypes. The populations should eventually become entirely hexaploid. In the current populations, however, enneaploids are big, vigorous and fertile individuals.

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The Effect of Selection and Inbreeding on the Growth of Big Bluestem (Andropogon Furcatus, Muhl.)¹

Cited by 23 publications

References 0 publications

An Outcrossing Reciprocity Study Between Remnant Big Bluestem (Andropogon gerardii) Populations in the Carolinas

An Outcrossing Reciprocity Study Between Remnant Big Bluestem (Andropogon gerardii) Populations in the Carolinas

Seed Production of Native Grasses under Cultivation in Eastern Kansas

Impact of Intraspecific Polyploidy in Andropogon gerardii (Poaceae) Populations

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The Effect of Selection and Inbreeding on the Growth of Big Bluestem (Andropogon Furcatus, Muhl.)1

Cited by 23 publications

References 0 publications

An Outcrossing Reciprocity Study Between Remnant Big Bluestem (Andropogon gerardii) Populations in the Carolinas

An Outcrossing Reciprocity Study Between Remnant Big Bluestem (Andropogon gerardii) Populations in the Carolinas

Seed Production of Native Grasses under Cultivation in Eastern Kansas

Impact of Intraspecific Polyploidy in Andropogon gerardii (Poaceae) Populations

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Product

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The Effect of Selection and Inbreeding on the Growth of Big Bluestem (Andropogon Furcatus, Muhl.)¹