Affiliation:
1. Instituto de Botánica del Nordeste, Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Consejo Nacional de Investigaciones Científicas y Técnicas, Corrientes 3400, Argentina
2. Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
Abstract
The tetraploid germplasm of Paspalum contains a large diversity that can be used to generate better forages. The objective was to evaluate a group of Paspalum notatum and Paspalum simplex apomictic hybrids for a set of agronomic traits and apomixis expressivity. Forage yield, cold tolerance, winter regrowth, and seed yield were evaluated. The expressivity of apomixis was evaluated in P. simplex hybrids by flow cytometry. Progeny testing with molecular markers was used to determine the genotypic variability in the progeny. Differences within P. notatum and P. simplex hybrids were observed for all traits, and some of them were superior in comparison with the controls. The accumulated forage yield during three years was 988 g m−2 in the P. notatum hybrids, whereas, in P. simplex, the average forage yield per harvest (40 days of regrowth) was 180 g m−2. In P. simplex, the apomixis expressivity varied between 0 and 100%, and 65% of the hybrids showed high apomixis expressivity (superior to 70%). The genotypic mean homogeneity in the progeny was 76% and 85% in P. notatum and P. simplex, respectively. The generation of hybrids with high apomixis expressivity that combine good agronomic performance and homogeneity in the offspring is possible in tetraploid P. notatum and P. simplex.
Subject
Genetics (clinical),Genetics
Reference41 articles.
1. Skerman, P.J., and Riveros, F. (1992). Colección FAO: Protección Vegetal, Organización de las Naciones Unidas para la Agricultura y la Alimentación. [23rd ed.].
2. Native grasslands at the core: A new paradigm of intensification for the campos of Southern South America to increase economic and environmental sustainability;Jaurena;Front. Sustain. Food Syst.,2021
3. Evolution of grasses and grasslands in South America;Burkart;Taxon,1975
4. Zuloaga, F.O., and Morrone, O. (2005). Revisión de las Especies de Paspalum para América del Sur Austral (Argentina, Bolivia, sur de Brasil, Chile, Paraguay y Uruguay), Misouri Botanical Garden Press.
5. Registration of ‘Boyero UNNE’ Bahiagrass;Urbani;J. Plant Regist.,2017
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献