<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hignight, K. W.</style></author><author><style face="normal" font="default" size="100%">Bashaw, E. C.</style></author><author><style face="normal" font="default" size="100%">Hussey, M. A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Cytological and Morphological Diversity of Native Apomictic Buffelgrass, Pennisetum-Ciliare (L) Link</style></title><secondary-title><style face="normal" font="default" size="100%">Botanical Gazette</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Bot Gaz</style></alt-title></titles><dates><year><style  face="normal" font="default" size="100%">1991</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jun</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://A1991GD66700011</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">152</style></volume><pages><style face="normal" font="default" size="100%">214-218</style></pages><isbn><style face="normal" font="default" size="100%">0006-8071</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">Diverse native morphotypes of apomictic buffelgrass (Pennisetum ciliare [L.] Link [Cenchrus ciliaris L.] were investigated cytologically to determine the sources of variation and to establish relationships among widely different natural accessions.  The primary objectives were to determine mode of reproduction of accessions and hybrid progenies through embryo sac studies and to assess the potential of the material for use as germplasm in a breeding program.  Although most native buffelgrass ecotypes are obligate apomicts, reproductive studies showed evidence for sexual reproduction (facultative apomixis) in each of five accessions chosen for a hybridization study.  A fully differentiated single sexual embryo sac was observed in 7% of the ovules from two accessions, each of which also had one facultative ovule.  Cytological studies on five of the most diverse types and their F1 hybrids with a sexual buffelgrass clone (B-1s) showed very similar chromosome pairing relationships at metaphase I of parents and their progenies.  These results demonstrate a close relationship between types and indicate that they represent a primary gene pool for breeding purposes.  The extreme morphological diversity present in the types is explained by the limited sexual reproduction.  Highly apomictic divergent morphotypes could colonize large areas and easily be mistaken for different species.</style></abstract><accession-num><style face="normal" font="default" size="100%">ISI:A1991GD66700011</style></accession-num><notes><style face="normal" font="default" size="100%">Gd667Times Cited:13Cited References Count:16SI Document Delivery No.: GD667Times Cited: 13Cited Reference Count: 16Cited References: BASHAW EC, 1962, CROP SCI, V2, P412 BASHAW EC, 1969, CROP SCI, V9, P396 BASHAW EC, 1985, AGR ABSTR, P48 BASHAW EC, 1990, CROP SCI, V30, P571 CLAUSEN J, 1954, CARYOLOGIA S, V6, P469 CLAYTON WD, 1982, GRAMINEAE 3 CLAYTON WD, 1986, GENERA GRAMINUM DARLINGTON CD, 1939, EVOLUTION GENETIC SY DELISLE DG, 1963, IOWA STATE J SCI, V37, P259 FISHER WD, 1954, AGRON J, V46, P401 GOULD FW, 1975, GRASSES TEXAS HARLAN JR, 1962, AGR ABSTR, P79 READ JC, 1969, CROP SCI, V9, P805 RUTISHAUSER A, 1969, CHROMOSOMES TODAY, V2, P202 TALIAFERRO CM, 1966, CROP SCI, V6, P473 YOUNG BA, 1979, CAN J BOT, V57, P1668Univ chicago pressChicago</style></notes><auth-address><style face="normal" font="default" size="100%">Usda Ars,So Crops Res Lab,College Stn,Tx 77843Texas a&amp;M Univ Syst,Dept Soil &amp; Crop Sci,College Stn,Tx 77843</style></auth-address></record></records></xml>