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Apomixis—asexual reproduction through seed—provides a convenient means to faithfully propagate even heterozygous genotypes and hence exploit heterosis, in several naturally apomictic, warm-season forage grasses. Inheritance of apomixis has been shown to be monogenic dominant in at least four econ...


Miles, John W.[Apomixis for cultivar development in tropical forage grasses]Apomixis for cultivar development in tropical forage grasses

Evaluation of natural Stylosanthes germplasm leading to the release of 8 commercial cultivars began in South America in the late 1960s and early 1970s. Perceived deficiencies in existing germplasm, including anthracnose susceptibility, led to the initiation of Stylosanthes breeding projects as ea...


Miles, John W.Grof, B[Recent advances in studies of anthracnose of Stylosanthes. III. Stylosanthes breeding approaches in South America]Recent advances in studies of anthracnose of Stylosanthes. III. Stylosanthes breeding approaches in South America

Spittlebugs (Homoptera: Cercopidae) are important pests of forage grasses in the genus Brachiaria (Trin.) Griseb. throughout the neotropics. Results of recurrent selection on resistance to spittlebugs in a synthetic brachiariagrass population are reported. The population was synthesized by recomb...


Miles, John W.Cardona Mejía, CésarSotelo, Guillermo[Recurrent selection in a synthetic brachiariagrass population improves resistance to three spittlebug species]Recurrent selection in a synthetic brachiariagrass population improves resistance to three spittlebug species
Hershey, Clair H.Miles, John W.Davis, J.H.C.[Strategies for genetic improvement of the CIAT commodities: seeking a balance between broad adaptability and site specificity]Strategies for genetic improvement of the CIAT commodities: seeking a balance between broad adaptability and site specificity

Until 10 years ago, genetic improvement of Brachiaria species depended entirely on selection among naturally existing genotypes, genetic recombination being impossible because of prevailing apomictic reproduction. However, recent advances in understanding the genetics and cytogenetics of Brachiar...


Miles, John W.Valle, Cacilda Borges do[Manipulation of apomixis in Brachiaria breeding]Manipulation of apomixis in Brachiaria breeding

Allogamous reproductive behavior and the demonstrated existence of ample genetic variation for a number of agronomic traits in Andropogon gayanus suggest a substantial potential for genetic manipulation of the species. Possible breeding objectives are considered and appropriate breeding methods d...


Miles, John W.Grof, B[Genetics and plant breeding of Andropogon gayanus]Genetics and plant breeding of Andropogon gayanus

The genus Stylosanthes Sw. has provided ample germplasm for a wide variety of agroecological situations in the tropics. The most important attributes of successful Stylosanthes cultivars used as pasture or ley in the tropics are resistance to diseases, high seed yield and adaptation to poor soils...


Kelemu, SegenetMiles, John W.Rao, Idupulapati M.[Biotic and abiotic constraints to Stylosanthes production]Biotic and abiotic constraints to Stylosanthes production
Argel M., Pedro J.Miles, John W.Guiot García, JDCuadrado Capella, HLascano, Carlos E.[Cultivar mulato II (Brachiaria hybrid CIAT 36087): a high-quality forage grass, resistant to spittlebugs and adapted to well-drained, acid tropical soils]Cultivar mulato II (Brachiaria hybrid CIAT 36087): a high-quality forage grass, resistant to spittlebugs and adapted to well-drained, acid tropical soils

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