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Apomictic Grasses
Name ten grasses in different genera that are apomictic!!!
Phred wrote in message ... In article , "Cereoid-UR12-" wrote: Monoculture is strictly for convenience. Grasses need to have plants in close proximity because they are wind pollinated. Plenty are apomictic. There is no "wild" maize. The wild relatives have no cob and are called Teosinte. nobody wrote in message news On Sat, 23 Aug 2003 12:18:43 +1000, "Frank Martin" wrote: Are some plants better planted in a group of their fellows than just singly? My grandmother says some plants are like flocks of birds and do better in a group. Does anyone know about this? In order to produce good ears, corn must be planted pretty densely. As I recall, you need to have at least three or four rows to get any ears of corn. But, that is the way man has cultivated the plant... i dont know if wild maize has similar population density requirements. But I wouldnt doubt that wind pollinated plants need to have others nearby in order to set seed. Cheers, Phred. -- LID |
#2
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Apomictic Grasses
"Cereoid-UR12-" wrote in message m...
Name ten grasses in different genera that are apomictic!!! Eragrostis, Chloris, Brachiaria, Cenchris, Panicum, Paspalum, Pennisetum, Tripsacum, Hyparrhenia, Poa. Many important forage grass species are obligate or facultative apomicts. -- Chris Green |
#3
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Apomictic Grasses
We await, breathlessly, the expected riposte from our brother-in-biology
Cereoid-UR12-.....! "Christopher Green" wrote in message om... "Cereoid-UR12-" wrote in message m... Name ten grasses in different genera that are apomictic!!! Eragrostis, Chloris, Brachiaria, Cenchris, Panicum, Paspalum, Pennisetum, Tripsacum, Hyparrhenia, Poa. Many important forage grass species are obligate or facultative apomicts. -- Chris Green |
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Apomictic Grasses
On 24 Aug 2003 16:27, "Cereoid-UR12-" wrote:
Name ten grasses in different genera that are apomictic!!! Two of them: Poa alpina L. Festuca airoides Lam. Both species produces apomictic varietes/forms in high mountains. Regards, -- /\/\ichal Smoczyk, msmoczykNOSPAM(at)wp.pl ===delete 'NOSPAM' from my address=== |
#5
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Apomictic Grasses
Would have preferred that Phred answered the question himself instead of
your deliberate obfuscation. Yes, those are genera of grasses but which actual species in those genera are apomictic, if any? A list of generic names alone tells us nothing. Christopher Green wrote in message om... "Cereoid-UR12-" wrote in message m... Name ten grasses in different genera that are apomictic!!! Eragrostis, Chloris, Brachiaria, Cenchris, Panicum, Paspalum, Pennisetum, Tripsacum, Hyparrhenia, Poa. Many important forage grass species are obligate or facultative apomicts. -- Chris Green |
#6
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Apomictic Grasses
Even though he did not answer the question, he did list the names of genera
of grasses. Thats far more than you can do, Frankfurter!!! Frank Martin wrote in message ... We await, breathlessly, the expected riposte from our brother-in-biology Cereoid-UR12-.....! "Christopher Green" wrote in message om... "Cereoid-UR12-" wrote in message m... Name ten grasses in different genera that are apomictic!!! Eragrostis, Chloris, Brachiaria, Cenchris, Panicum, Paspalum, Pennisetum, Tripsacum, Hyparrhenia, Poa. Many important forage grass species are obligate or facultative apomicts. -- Chris Green |
#7
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Apomictic Grasses
Finally, an actual answer from somebody that knows!!!!
Two down and eight to go!!! /\/\ichau wrote in message ... On 24 Aug 2003 16:27, "Cereoid-UR12-" wrote: Name ten grasses in different genera that are apomictic!!! Two of them: Poa alpina L. Festuca airoides Lam. Both species produces apomictic varietes/forms in high mountains. Regards, -- /\/\ichal Smoczyk, msmoczykNOSPAM(at)wp.pl ===delete 'NOSPAM' from my address=== |
#8
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Apomictic Grasses
In article ,
[/\\/\\ichau] wrote... On 24 Aug 2003 16:27, "Cereoid-UR12-" wrote: Name ten grasses in different genera that are apomictic!!! Sounds like fun, but why do you ask? Is this perhaps from someone's homework assignment? [A "please" might work better than the three exclamation points.] Two of them: Poa alpina L. Festuca airoides Lam. Both species produces apomictic varietes/forms in high mountains. Okay, then that's two species and genera. Let's look for some more. http://www.apomixis.de/back.htm: "Apomictic processes have been observed in many plant species and are most common in the Gramineae, Compositae and Rosaceae." "But with the exception of Citrus, Malus and some forage grasses like Poa and Panicum, apomixis is not very common in agriculturally important crops (Koltunow, 1993)." "New strategies and methods are now in progress to compare sexual and apomictic varieties of grass species, like e.g. Poa, Paspalum and Brachiaria, and to map the corresponding genes." "Molecular tools have been developed to compare sexual and apomictic ovaries in Pennisetum (Vielle-Calzada et al., 1996b)" "In apomictic Tripsacum RFLP and PCR-RAPD markers co-segregating with diplospory have been mapped to the same locus (Leblanc et al., 1995b; Kindinger et al., 1996)" http://www.hort.purdue.edu/newcrop/p...93/V2-294.html "Buffelgrass, Cenchrus ciliaris L. [...] They are the product of plant breeding made possible by the discovery of a sexual plant that could be crossed with apomictic introductions and release their variability (Bashaw 1980)." "Weeping lovegrass, Eragrostis curvula (Schrad.) Nees [...] It reproduces by obligate apomixis that has blocked genetic improvement until recently." Brachiaria decumbens Stapf. Cenchrus ciliaris L. Eragrostis curvula (Schrad.) Nees Panicum maximum Jacq. http://www.hort.purdue.edu/newcrop/p...90/v1-174.html: "[...] and the obligate apomictic dallisgrass, Paspalum dilatatum Poir. have not been improved." "The tetraploid bahiagrasses, Paspalum notatum Flugge from South America are obligate apomicts and breed true." http://herbarium.usu.edu/Reports/publications.htm: [...]"the apomictic Poa secunda Presl. complex" [...]"apomictic Elymus rectisetus (Nees in Lehm.) A. Löve & Connor" "Characterization of pseudogamy in an apomictic rice line." http://tncweeds.ucdavis.edu/esadocs/...s/cortjub.html: "Cortaderia jubata [...] There are populations of Cortaderia that consist entirely of pistillate (female) plants that form seed without the necessity of pollination (apomixis) (Costas Lippmann 1976)." http://www.griffin.peachnet.edu/cssc...spalum/ref.htm: "sexual diploid biotypes of two apomictic Paspalum species" "A biosystemic study of selected facultative apomictic species of Pennisetum" http://www.botany.hawaii.edu/faculty...blications.htm: "Morden, C. W. and S. L. Hatch. 1986. Vegetative apomixis in Muhlenbergia repens (Poaceae: Eragrostideae). SIDA 11: 282-285" How many genera is that so far? Eleven, I think. Let's try Biological Abstracts for some mo Apomixis in guineagrass (Panicum maximum Jacq.). Wang-Yan; Xu-Qiu-sheng; Ye-Xiu-lin {a} Journal-of-Tropical-and-Subtropical-Botany. [print] 2003; 11 (1): 83-86. Influence of photoperiod on facultative apomixis in Apluda mutica. Ma-San-mei; Wang-Yong-fei; Ye-Xiu-lin {a}; Zhao-Nan-xian; Liang-Cheng-Ye Journal-of-Tropical-and-Subtropical-Botany. [print] 2003; 11 (1): 64-66. Sexual and apomictic seed development in the vulnerable grass Bothriochloa biloba. Yu-Ping {a}; Prakash-N; Whalley-R-D-B Australian-Journal-of-Botany. [print] 2003; 51 (1): 75-84. Once again: The correct name of the endemic Calamagrostis from Saxony (Germany). Raus-Th {a}; Scholz-H {a} Feddes-Repertorium. [print] 2002; 113 (3-4): 271-272. "[...]the correct species name of the apomictic Calamagrostis endemic to Saxony, hitherto known as C. pseudopurpurea, is C. rivalis." Reproductive ecology of a native Hawaiian grass (Heteropogon contortus; Poaceae) versus its invasive alien competitor (Pennisetum setaceum; Poaceae). Goergen-Erin; Daehler-Curtis-C {a} International-Journal-of-Plant-Sciences. [print] March, 2001; 162 (2): 317-326. "Both species are drought-tolerant, perennial, C4 bunch-grasses that rely on apomictic seeds for reproduction. " The influence of fire on the demography of a dominant grass species of West African savannas, Hyparrhenia diplandra. Garnier-Lisa-K-M; Dajoz-Isabelle {a} Journal-of-Ecology. [print] April, 2001; 89 (2): 200-208. "differences between clones showed that growth rate also had a genetic basis in this apomictic species." Genetic variability and phytogeography of Miscanthus sinensis var. condensatus, an apomictic grass, based on RAPD fingerprints. Chou-Chang-Hung; Chiang-Yu-Chung; Chiang-Tzen-Yuh {a} Canadian-Journal-of-Botany. [print] October, 2000; 78 (10): 1262-1268. An apomictic autotriploid line TAR identified in Oryza sativa. Liu-Yong-Sheng {a}; Sung-Jing-San; Hsu-Francis {a} Acta-Botanica-Sinica. 1996; 38 (11) 917-920. Embryological study on apomixis in a sorghum line SSA-1. Wu-Shu-Biao {a}; Shang-Yong-Jin {a}; Han-Xue-Mei {a}; Wang-Jing-Xue {a}; Niu-Tian-Tang; Zhang-Fu-Yao; Wei-Yao-Ming; Meng-Cue-Gang; Yan-Xi-Mei; Zheng-Jing-Bo Acta-Botanica-Sinica. 1994; 36 (11) 833-837. Evolution of reproduction in Lamprothyrsus (Arundineae: Gramineae). Connor-H-E {a}; Dawson-M-I Annals-of-the-Missouri-Botanical-Garden. 1993; 80 (2) 513-517. Lamprothyrsus, a ditypic arundinoid, South American grass genus, consists predominantly of populations of exclusively female plants in which seeds are set by autonomous apospory. A cytogenetic study of a hexaploid Themeda triandra Forssk. population. Fossey-Annabel; Liebenberg-H South-African-Journal-of-Botany. 1992; 58 (4) 275-276. "The data support the fact that the hexaploids are near obligate apomicts." Apomixis in the gramineae. Ma-Guo-hua {a}; Zhao-Nan-xian {a}; Huang-Xue-lin Journal-of-Tropical-and-Subtropical-Botany. [print] 2001; 9 (1): 83-92. Gramineae is one of the largest families with widest distribution on the globe. It contains most important crops in the world including a great number of apomictic species. Apomixis has great potentialities for utilization of crop hybrid vigor. However, apomixis as a reproductive way of diversity in plant revolution is very comprehensive. In this paper, the distribution of apomictic species in Gramineae is reviewed. Advance in studies on apomixes in aspects of cytology, genetics and molecular biology are also summarized. The structure of agamocomplexes and the problem of saltatory speciation in angiosperms. Kashin-A-S Botanicheskii-Zhurnal-St-Petersburg. Jan., 1999; 84 (1): 15-29. Russian; Non-English Summary: English; Russian [among the organisms listed: Bothriochloa- (Gramineae-); Calamagrostis- (Gramineae-); Dichanthium- (Gramineae-);Poa- (Gramineae-)] Okay, so far we've got about 19 - 20 or so grass genera with known apomictic forms. I''ve no doubt there are plenty more. cheers |
#9
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Apomictic Grasses
"Christopher Green" skrev i en meddelelse om... "Cereoid-UR12-" wrote in message m... Name ten grasses in different genera that are apomictic!!! Eragrostis, Chloris, Brachiaria, Cenchris, Panicum, Paspalum, Pennisetum, Tripsacum, Hyparrhenia, Poa. Many important forage grass species are obligate or facultative apomicts. Could you give som examples to species complexes compareable with i.e. Rubus and former Potentilla argentea? Poul Evald Hansen |
#10
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Apomictic Grasses
"Cereoid-UR12-" wrote in message m...
Would have preferred that Phred answered the question himself instead of your deliberate obfuscation. Yes, those are genera of grasses but which actual species in those genera are apomictic, if any? A list of generic names alone tells us nothing. Look 'em up yourself. There are hundreds. -- Chris Green |
#12
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Apomictic Grasses
In article ,
"Cereoid-UR12-" wrote: Name ten grasses in different genera that are apomictic!!! Here's a few you can look up... but I'm stuffed if I'm going to do *all* your homework for you, so look up the details for yourself and don't be a typical lazy student parasitising the web. In no particular order: Brachiaria, Paspalum, Eragrostis, Poa, Dichanthium, Tripsacum, Cenchrus, Pennisetum, Panicum, Hyparrhenia, Vetiveria, Themeda, Heteropogon, Bouteloua, Bothriochloa, Capillipedium... (And I suppose we could even throw in Zea now.) Cheers, Phred. -- LID |
#13
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Apomictic Grasses
I'm not a student, Buckwheat.
I just want you to put your money where you flip mouth is, you superficial smartass. You still haven't answered the question, you ******. I asked for a list of SPECIES in ten different genera not just random list of generic names. Any idiot can randomly throw out the names of genera and you have proven that. Most if not all of the species in those genera ARE NOT APOMICTIC. That makes you the lazy parasite who cannot back the outrageous statements you make. Phred wrote in message ... In article , "Cereoid-UR12-" wrote: Name ten grasses in different genera that are apomictic!!! Here's a few you can look up... but I'm stuffed if I'm going to do *all* your homework for you, so look up the details for yourself and don't be a typical lazy student parasitising the web. In no particular order: Brachiaria, Paspalum, Eragrostis, Poa, Dichanthium, Tripsacum, Cenchrus, Pennisetum, Panicum, Hyparrhenia, Vetiveria, Themeda, Heteropogon, Bouteloua, Bothriochloa, Capillipedium... (And I suppose we could even throw in Zea now.) Cheers, Phred. -- LID |
#14
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Apomictic Grasses
( Yawn.....! )
"Cereoid-UR12-" wrote in message m... No, its because Phred boldly proclaimed in this newsgroup that many grasses are apomictic without giving any actual examples. There are far too many bold platitudes that people make in the guise of scientific fact that prove not to be true under closer examination. I wanted the dude to give actual proof of what he claimed. So far, he has not replied. I tend not to believe people who cannot back what they claim. Michau generously provided two examples of apomictic grasses but that hardly constitutes "many". Thank you Mel for providing actual references and actual species names. Phred and prissy Chris Green can eat your dust!!! mel turner wrote in message ... In article , [/\\/\\ichau] wrote... On 24 Aug 2003 16:27, "Cereoid-UR12-" wrote: Name ten grasses in different genera that are apomictic!!! Sounds like fun, but why do you ask? Is this perhaps from someone's homework assignment? [A "please" might work better than the three exclamation points.] Two of them: Poa alpina L. Festuca airoides Lam. Both species produces apomictic varietes/forms in high mountains. Okay, then that's two species and genera. Let's look for some more. http://www.apomixis.de/back.htm: "Apomictic processes have been observed in many plant species and are most common in the Gramineae, Compositae and Rosaceae." "But with the exception of Citrus, Malus and some forage grasses like Poa and Panicum, apomixis is not very common in agriculturally important crops (Koltunow, 1993)." "New strategies and methods are now in progress to compare sexual and apomictic varieties of grass species, like e.g. Poa, Paspalum and Brachiaria, and to map the corresponding genes." "Molecular tools have been developed to compare sexual and apomictic ovaries in Pennisetum (Vielle-Calzada et al., 1996b)" "In apomictic Tripsacum RFLP and PCR-RAPD markers co-segregating with diplospory have been mapped to the same locus (Leblanc et al., 1995b; Kindinger et al., 1996)" http://www.hort.purdue.edu/newcrop/p...93/V2-294.html "Buffelgrass, Cenchrus ciliaris L. [...] They are the product of plant breeding made possible by the discovery of a sexual plant that could be crossed with apomictic introductions and release their variability (Bashaw 1980)." "Weeping lovegrass, Eragrostis curvula (Schrad.) Nees [...] It reproduces by obligate apomixis that has blocked genetic improvement until recently." Brachiaria decumbens Stapf. Cenchrus ciliaris L. Eragrostis curvula (Schrad.) Nees Panicum maximum Jacq. http://www.hort.purdue.edu/newcrop/p...90/v1-174.html: "[...] and the obligate apomictic dallisgrass, Paspalum dilatatum Poir. have not been improved." "The tetraploid bahiagrasses, Paspalum notatum Flugge from South America are obligate apomicts and breed true." http://herbarium.usu.edu/Reports/publications.htm: [...]"the apomictic Poa secunda Presl. complex" [...]"apomictic Elymus rectisetus (Nees in Lehm.) A. Löve & Connor" "Characterization of pseudogamy in an apomictic rice line." http://tncweeds.ucdavis.edu/esadocs/...s/cortjub.html: "Cortaderia jubata [...] There are populations of Cortaderia that consist entirely of pistillate (female) plants that form seed without the necessity of pollination (apomixis) (Costas Lippmann 1976)." http://www.griffin.peachnet.edu/cssc...spalum/ref.htm: "sexual diploid biotypes of two apomictic Paspalum species" "A biosystemic study of selected facultative apomictic species of Pennisetum" http://www.botany.hawaii.edu/faculty...blications.htm: "Morden, C. W. and S. L. Hatch. 1986. Vegetative apomixis in Muhlenbergia repens (Poaceae: Eragrostideae). SIDA 11: 282-285" How many genera is that so far? Eleven, I think. Let's try Biological Abstracts for some mo Apomixis in guineagrass (Panicum maximum Jacq.). Wang-Yan; Xu-Qiu-sheng; Ye-Xiu-lin {a} Journal-of-Tropical-and-Subtropical-Botany. [print] 2003; 11 (1): 83-86. Influence of photoperiod on facultative apomixis in Apluda mutica. Ma-San-mei; Wang-Yong-fei; Ye-Xiu-lin {a}; Zhao-Nan-xian; Liang-Cheng-Ye Journal-of-Tropical-and-Subtropical-Botany. [print] 2003; 11 (1): 64-66. Sexual and apomictic seed development in the vulnerable grass Bothriochloa biloba. Yu-Ping {a}; Prakash-N; Whalley-R-D-B Australian-Journal-of-Botany. [print] 2003; 51 (1): 75-84. Once again: The correct name of the endemic Calamagrostis from Saxony (Germany). Raus-Th {a}; Scholz-H {a} Feddes-Repertorium. [print] 2002; 113 (3-4): 271-272. "[...]the correct species name of the apomictic Calamagrostis endemic to Saxony, hitherto known as C. pseudopurpurea, is C. rivalis." Reproductive ecology of a native Hawaiian grass (Heteropogon contortus; Poaceae) versus its invasive alien competitor (Pennisetum setaceum; Poaceae). Goergen-Erin; Daehler-Curtis-C {a} International-Journal-of-Plant-Sciences. [print] March, 2001; 162 (2): 317-326. "Both species are drought-tolerant, perennial, C4 bunch-grasses that rely on apomictic seeds for reproduction. " The influence of fire on the demography of a dominant grass species of West African savannas, Hyparrhenia diplandra. Garnier-Lisa-K-M; Dajoz-Isabelle {a} Journal-of-Ecology. [print] April, 2001; 89 (2): 200-208. "differences between clones showed that growth rate also had a genetic basis in this apomictic species." Genetic variability and phytogeography of Miscanthus sinensis var. condensatus, an apomictic grass, based on RAPD fingerprints. Chou-Chang-Hung; Chiang-Yu-Chung; Chiang-Tzen-Yuh {a} Canadian-Journal-of-Botany. [print] October, 2000; 78 (10): 1262-1268. An apomictic autotriploid line TAR identified in Oryza sativa. Liu-Yong-Sheng {a}; Sung-Jing-San; Hsu-Francis {a} Acta-Botanica-Sinica. 1996; 38 (11) 917-920. Embryological study on apomixis in a sorghum line SSA-1. Wu-Shu-Biao {a}; Shang-Yong-Jin {a}; Han-Xue-Mei {a}; Wang-Jing-Xue {a}; Niu-Tian-Tang; Zhang-Fu-Yao; Wei-Yao-Ming; Meng-Cue-Gang; Yan-Xi-Mei; Zheng-Jing-Bo Acta-Botanica-Sinica. 1994; 36 (11) 833-837. Evolution of reproduction in Lamprothyrsus (Arundineae: Gramineae). Connor-H-E {a}; Dawson-M-I Annals-of-the-Missouri-Botanical-Garden. 1993; 80 (2) 513-517. Lamprothyrsus, a ditypic arundinoid, South American grass genus, consists predominantly of populations of exclusively female plants in which seeds are set by autonomous apospory. A cytogenetic study of a hexaploid Themeda triandra Forssk. population. Fossey-Annabel; Liebenberg-H South-African-Journal-of-Botany. 1992; 58 (4) 275-276. "The data support the fact that the hexaploids are near obligate apomicts." Apomixis in the gramineae. Ma-Guo-hua {a}; Zhao-Nan-xian {a}; Huang-Xue-lin Journal-of-Tropical-and-Subtropical-Botany. [print] 2001; 9 (1): 83-92. Gramineae is one of the largest families with widest distribution on the globe. It contains most important crops in the world including a great number of apomictic species. Apomixis has great potentialities for utilization of crop hybrid vigor. However, apomixis as a reproductive way of diversity in plant revolution is very comprehensive. In this paper, the distribution of apomictic species in Gramineae is reviewed. Advance in studies on apomixes in aspects of cytology, genetics and molecular biology are also summarized. The structure of agamocomplexes and the problem of saltatory speciation in angiosperms. Kashin-A-S Botanicheskii-Zhurnal-St-Petersburg. Jan., 1999; 84 (1): 15-29. Russian; Non-English Summary: English; Russian [among the organisms listed: Bothriochloa- (Gramineae-); Calamagrostis- (Gramineae-); Dichanthium- (Gramineae-);Poa- (Gramineae-)] Okay, so far we've got about 19 - 20 or so grass genera with known apomictic forms. I''ve no doubt there are plenty more. cheers |
#15
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Apomictic Grasses
Surely this reply is too astringent and acerbic and not in keeping with the
respect due to fellow scientists. Phred may be some nascent biologist whose botanical heart has just been crushed by your cruel put-downs. Do you want that on your conscience? "Cereoid-UR12-" wrote in message m... I'm not a student, Buckwheat. I just want you to put your money where you flip mouth is, you superficial smartass. You still haven't answered the question, you ******. I asked for a list of SPECIES in ten different genera not just random list of generic names. Any idiot can randomly throw out the names of genera and you have proven that. Most if not all of the species in those genera ARE NOT APOMICTIC. That makes you the lazy parasite who cannot back the outrageous statements you make. Phred wrote in message ... In article , "Cereoid-UR12-" wrote: Name ten grasses in different genera that are apomictic!!! Here's a few you can look up... but I'm stuffed if I'm going to do *all* your homework for you, so look up the details for yourself and don't be a typical lazy student parasitising the web. In no particular order: Brachiaria, Paspalum, Eragrostis, Poa, Dichanthium, Tripsacum, Cenchrus, Pennisetum, Panicum, Hyparrhenia, Vetiveria, Themeda, Heteropogon, Bouteloua, Bothriochloa, Capillipedium... (And I suppose we could even throw in Zea now.) Cheers, Phred. -- LID |
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