Identification of a molecular marker linked to apomixis in Brachiaria humidicola (Poaceae)
نویسندگان
چکیده
منابع مشابه
Origin of a polyploid accession of Brachiaria humidicola (Poaceae: Panicoideae: Paniceae).
Brachiaria humidicola, a species adapted to poorly drained and infertile acid soils, is widely used throughout the tropics. Cytological characterization of 54 accessions of B. humidicola for breeding purposes revealed 2n = 36, 42, and 54 chromosomes. One accession (H030), with 2n = 42 chromosomes, showed a different meiotic behavior. In most accessions from the genus Brachiaria previously studi...
متن کاملMeiotic behavior of a nonaploid accession endorses x = 6 for Brachiaria humidicola (Poaceae).
Brachiaria humidicola (Poaceae), originally from Africa, is an economically important pasture plant in tropical South America. An accession of B. humidicola (H038) collected from the wild African savanna (Mbeya, Tanzania) showed irregular microsporogenesis. This meiotic behavior was consistent with an allopolyploid origin. Multivalent chromosome association at diakinesis gave tri- to octavalent...
متن کاملMeiotic behavior in nonaploid accessions of Brachiaria humidicola (Poaceae) and implications for breeding.
Brachiaria humidicola is a grass adapted to seasonally swampy grasslands in Africa; two cultivars, 'common' and Llanero, are widely used in Brazilian pastures. New cultivars are in great demand in order to diversify current production systems to achieve improved quality and yield. Cytological analyses of 55 accessions of this species available from the Embrapa Beef Cattle germplasm collection r...
متن کاملSpecial metabolites isolated from Urochloa humidicola (Poaceae).
This study aims to identify special metabolites in polar extracts from Urochloa humidicola (synonym Brachiaria humidicola) that have allelopathic effects and induce secondary photosensitization in ruminants. The compounds were isolated and identified via chromatographic and spectroscopic techniques. The compounds 4-hydroxy-3-methoxy-benzoic acid, trans-4-hydroxycinnamic acid, and p-hydroxy-benz...
متن کاملتاثیر بازدارندگی ترشحات رشد brachiaria humidicola نیتریفیکاسیون
ممانعت از نیتریفیکاسیون در اکوسیستمهای طبیعی چندین دهه است که مطرح میباشد. این اثرات ممانعت کنندگی یک ویژگی ژنوتیپهای وحشی میباشد تا ارقام تجاری. بسیاری از گیاهان مخصوصاً گراسها نشان داده شده اند که دارای این خاصیت ممانعت از نیتریفیکاسیون هستند و اخیراً برخی ژنوتیپهای Brachiaria مخصوصاً humidicola Brachiaria توجه زیادی را به سبب نقش آنها در کاهش میزان نیتریفیکاسیون در خاک از طریق ترشحات ریش...
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ژورنال
عنوان ژورنال: Plant Breeding
سال: 2010
ISSN: 0179-9541
DOI: 10.1111/j.1439-0523.2010.01763.x