Meiotic stability in two valuable interspecific hybrids of Brachiaria (Poaceae)
With 2 figures and 2 tables ABSTRACT: In an attempt to increase genetic variability in the genus Brachiaria, crosses were made between sexual tetraploidized accessions of B. ruziziensis and apomictic tetraploid accessions of B. brizantha (2n = 4x = 36). Among the F1 progenies, two hybrids (Hb331, ap...
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| Veröffentlicht in: | Plant breeding 2012-06, Vol.131 (3), p.402-408 |
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| creator | Felismino, Mariana F Pagliarini, Maria S Do Valle, Cacilda B Resende, Rosângela. M. S |
| description | With 2 figures and 2 tables ABSTRACT: In an attempt to increase genetic variability in the genus Brachiaria, crosses were made between sexual tetraploidized accessions of B. ruziziensis and apomictic tetraploid accessions of B. brizantha (2n = 4x = 36). Among the F1 progenies, two hybrids (Hb331, apomictic; and Hb336, sexual) displayed several agronomically desirable traits. These hybrids were evaluated for several years, and the apomictic one is now being tested under grazing to be released as a new cultivar, whereas the sexual one is in a reciprocal recurrent selection programme. The possibility of gene exchange through recombination of genitors and their meiotic behaviour was investigated. Both hybrids were evaluated for meiotic stability during three consecutive years. Analyses of meiocytes at diakinesis revealed multivalent chromosome associations among the parental genomes, indicating that their gene pools are interchangeable. Irregular chromosome segregation, chromosome stickiness and a putative meiotic mutation were recorded. The frequency of abnormalities varied among years and also between the hybrids. The sexual hybrid Hb336 had a more stable meiotic behaviour, but pollen fertility was higher in apomictic Hb331, ensuring more viable seed formation. |
| doi_str_mv | 10.1111/j.1439-0523.2011.01942.x |
| format | Article |
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Analyses of meiocytes at diakinesis revealed multivalent chromosome associations among the parental genomes, indicating that their gene pools are interchangeable. Irregular chromosome segregation, chromosome stickiness and a putative meiotic mutation were recorded. The frequency of abnormalities varied among years and also between the hybrids. The sexual hybrid Hb336 had a more stable meiotic behaviour, but pollen fertility was higher in apomictic Hb331, ensuring more viable seed formation.</description><identifier>ISSN: 0179-9541</identifier><identifier>EISSN: 1439-0523</identifier><identifier>DOI: 10.1111/j.1439-0523.2011.01942.x</identifier><identifier>CODEN: PLABED</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Agronomy. Soil science and plant productions ; apomixis ; Biological and medical sciences ; Brachiaria ; chromosome association ; chromosome segregation ; chromosomes ; crossing ; cultivars ; forage grass breeding ; Fundamental and applied biological sciences. Psychology ; genes ; genetic variation ; Genetics and breeding of economic plants ; genome affinity ; grazing ; Heterosis. Floral biology applications: apomixy, male sterility, incompatibility, varia ; hybridization ; hybrids ; Interspecific and intergeneric hybridization, introgressions ; meiosis ; mutation ; Plant breeding: fundamental aspects and methodology ; pollen ; recurrent selection</subject><ispartof>Plant breeding, 2012-06, Vol.131 (3), p.402-408</ispartof><rights>2012 Blackwell Verlag GmbH</rights><rights>2015 INIST-CNRS</rights><rights>Copyright 2012 Blackwell Verlag GmbH</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4572-fced6d578dfbc9f63952c7b443a9f6b704f158e0e369a269dcca6394ac616b83</citedby><cites>FETCH-LOGICAL-c4572-fced6d578dfbc9f63952c7b443a9f6b704f158e0e369a269dcca6394ac616b83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1439-0523.2011.01942.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1439-0523.2011.01942.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25934848$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Felismino, Mariana F</creatorcontrib><creatorcontrib>Pagliarini, Maria S</creatorcontrib><creatorcontrib>Do Valle, Cacilda B</creatorcontrib><creatorcontrib>Resende, Rosângela. M. S</creatorcontrib><title>Meiotic stability in two valuable interspecific hybrids of Brachiaria (Poaceae)</title><title>Plant breeding</title><description>With 2 figures and 2 tables ABSTRACT: In an attempt to increase genetic variability in the genus Brachiaria, crosses were made between sexual tetraploidized accessions of B. ruziziensis and apomictic tetraploid accessions of B. brizantha (2n = 4x = 36). Among the F1 progenies, two hybrids (Hb331, apomictic; and Hb336, sexual) displayed several agronomically desirable traits. These hybrids were evaluated for several years, and the apomictic one is now being tested under grazing to be released as a new cultivar, whereas the sexual one is in a reciprocal recurrent selection programme. The possibility of gene exchange through recombination of genitors and their meiotic behaviour was investigated. Both hybrids were evaluated for meiotic stability during three consecutive years. Analyses of meiocytes at diakinesis revealed multivalent chromosome associations among the parental genomes, indicating that their gene pools are interchangeable. Irregular chromosome segregation, chromosome stickiness and a putative meiotic mutation were recorded. The frequency of abnormalities varied among years and also between the hybrids. The sexual hybrid Hb336 had a more stable meiotic behaviour, but pollen fertility was higher in apomictic Hb331, ensuring more viable seed formation.</description><subject>Agronomy. Soil science and plant productions</subject><subject>apomixis</subject><subject>Biological and medical sciences</subject><subject>Brachiaria</subject><subject>chromosome association</subject><subject>chromosome segregation</subject><subject>chromosomes</subject><subject>crossing</subject><subject>cultivars</subject><subject>forage grass breeding</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>genes</subject><subject>genetic variation</subject><subject>Genetics and breeding of economic plants</subject><subject>genome affinity</subject><subject>grazing</subject><subject>Heterosis. Floral biology applications: apomixy, male sterility, incompatibility, varia</subject><subject>hybridization</subject><subject>hybrids</subject><subject>Interspecific and intergeneric hybridization, introgressions</subject><subject>meiosis</subject><subject>mutation</subject><subject>Plant breeding: fundamental aspects and methodology</subject><subject>pollen</subject><subject>recurrent selection</subject><issn>0179-9541</issn><issn>1439-0523</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkF9v0zAUxS0EEmXwGYiEkOAhwf_ixA880GnrkDq2sSEer24cm7mEptjp1n57nGXq2yT8Yh_5d-49OoRkjBYsnU-rgkmhc1pyUXDKWEGZlrzYPSOzw8dzMqOs0rkuJXtJXsW4oqMW1YxcnFvfD95kccDGd37YZ36dDfd9dofdFpvOJj3YEDfWeJe4230TfBuz3mXzgObWY_CYfbjs0Vi0H1-TFw67aN883kfk5vTk5vgsX14svh5_WeZGlhXPnbGtasuqbl1jtFNCl9xUjZQCk2oqKh0ra0utUBq50q0xmCCJRjHV1OKIvJvGbkL_d2vjAKt-G9ZpIzAhpOaqZjpR9USZ0McYrINN8H8w7IFRGNuDFYwlwVgSjO3BQ3uwS9b3jwswGuxcwLXx8eDnpRaylmOQzxN37zu7_-_5cDn_Pr6SP5_8Pg52d_Bj-A2qElUJP78tYH69vFou1AKuEv924h32gL9CyvTjOk2WlFLJ5EOipwkuONXiH0wko50</recordid><startdate>201206</startdate><enddate>201206</enddate><creator>Felismino, Mariana F</creator><creator>Pagliarini, Maria S</creator><creator>Do Valle, Cacilda B</creator><creator>Resende, Rosângela. M. S</creator><general>Blackwell Publishing Ltd</general><general>Blackwell</general><general>Wiley Subscription Services, Inc</general><scope>FBQ</scope><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope></search><sort><creationdate>201206</creationdate><title>Meiotic stability in two valuable interspecific hybrids of Brachiaria (Poaceae)</title><author>Felismino, Mariana F ; Pagliarini, Maria S ; Do Valle, Cacilda B ; Resende, Rosângela. M. S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4572-fced6d578dfbc9f63952c7b443a9f6b704f158e0e369a269dcca6394ac616b83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Agronomy. Soil science and plant productions</topic><topic>apomixis</topic><topic>Biological and medical sciences</topic><topic>Brachiaria</topic><topic>chromosome association</topic><topic>chromosome segregation</topic><topic>chromosomes</topic><topic>crossing</topic><topic>cultivars</topic><topic>forage grass breeding</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>genes</topic><topic>genetic variation</topic><topic>Genetics and breeding of economic plants</topic><topic>genome affinity</topic><topic>grazing</topic><topic>Heterosis. Floral biology applications: apomixy, male sterility, incompatibility, varia</topic><topic>hybridization</topic><topic>hybrids</topic><topic>Interspecific and intergeneric hybridization, introgressions</topic><topic>meiosis</topic><topic>mutation</topic><topic>Plant breeding: fundamental aspects and methodology</topic><topic>pollen</topic><topic>recurrent selection</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Felismino, Mariana F</creatorcontrib><creatorcontrib>Pagliarini, Maria S</creatorcontrib><creatorcontrib>Do Valle, Cacilda B</creatorcontrib><creatorcontrib>Resende, Rosângela. M. 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S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Meiotic stability in two valuable interspecific hybrids of Brachiaria (Poaceae)</atitle><jtitle>Plant breeding</jtitle><date>2012-06</date><risdate>2012</risdate><volume>131</volume><issue>3</issue><spage>402</spage><epage>408</epage><pages>402-408</pages><issn>0179-9541</issn><eissn>1439-0523</eissn><coden>PLABED</coden><abstract>With 2 figures and 2 tables ABSTRACT: In an attempt to increase genetic variability in the genus Brachiaria, crosses were made between sexual tetraploidized accessions of B. ruziziensis and apomictic tetraploid accessions of B. brizantha (2n = 4x = 36). Among the F1 progenies, two hybrids (Hb331, apomictic; and Hb336, sexual) displayed several agronomically desirable traits. These hybrids were evaluated for several years, and the apomictic one is now being tested under grazing to be released as a new cultivar, whereas the sexual one is in a reciprocal recurrent selection programme. The possibility of gene exchange through recombination of genitors and their meiotic behaviour was investigated. Both hybrids were evaluated for meiotic stability during three consecutive years. Analyses of meiocytes at diakinesis revealed multivalent chromosome associations among the parental genomes, indicating that their gene pools are interchangeable. Irregular chromosome segregation, chromosome stickiness and a putative meiotic mutation were recorded. The frequency of abnormalities varied among years and also between the hybrids. The sexual hybrid Hb336 had a more stable meiotic behaviour, but pollen fertility was higher in apomictic Hb331, ensuring more viable seed formation.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1439-0523.2011.01942.x</doi><tpages>7</tpages></addata></record> |
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| subjects | Agronomy. Soil science and plant productions apomixis Biological and medical sciences Brachiaria chromosome association chromosome segregation chromosomes crossing cultivars forage grass breeding Fundamental and applied biological sciences. Psychology genes genetic variation Genetics and breeding of economic plants genome affinity grazing Heterosis. Floral biology applications: apomixy, male sterility, incompatibility, varia hybridization hybrids Interspecific and intergeneric hybridization, introgressions meiosis mutation Plant breeding: fundamental aspects and methodology pollen recurrent selection |
| title | Meiotic stability in two valuable interspecific hybrids of Brachiaria (Poaceae) |
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