Initial selection and breeding of Lesquerella fendleri, a new industrial oilseed. - (:unkn) unknown
Considerable research and developmental efforts are being devoted by both the public and private sectors to commercialize Lesquerella fendleri as a new industrial oilseed crop for the production of hydroxy fatty acids. Selection and breeding research initiated in 1984 at the USDA-ARS, US Water Conservation Laboratory. Phoenix, Arizona has made progress in increasing seed, oil and lesquerolic acid yields. Yields of 1700 kg/ha of seed, 30% oil and 59% lesquerolic acid have been obtained in replicated trials. Single plant selections developed during the interim are treceable to two propulations: one to a single collection made in Arixona. PI 331165, and the other to nine different accessions collected from various sites in Texas. Variation among selections within each pupulation exhibited relatively the same amount of netic variability. Neither pupulation appreared to be superior as a source of variation. The need for acquisition and utilization of new sources of germplasm is indicated. Topcross yield performance of six selected lines appreared to be superior to that of comparable halfsib family progeny, validating the existence of heterosis, which is expected due to the high degree of natural cross pollination observed. These data should serve as a benchmark upon which future progress iin varietal and pupulation develpment can be measured.
Incluye 13 referencias bibliográficas.
Considerable research and developmental efforts are being devoted by both the public and private sectors to commercialize Lesquerella fendleri as a new industrial oilseed crop for the production of hydroxy fatty acids. Selection and breeding research initiated in 1984 at the USDA-ARS, US Water Conservation Laboratory. Phoenix, Arizona has made progress in increasing seed, oil and lesquerolic acid yields. Yields of 1700 kg/ha of seed, 30% oil and 59% lesquerolic acid have been obtained in replicated trials. Single plant selections developed during the interim are treceable to two propulations: one to a single collection made in Arixona. PI 331165, and the other to nine different accessions collected from various sites in Texas. Variation among selections within each pupulation exhibited relatively the same amount of netic variability. Neither pupulation appreared to be superior as a source of variation. The need for acquisition and utilization of new sources of germplasm is indicated. Topcross yield performance of six selected lines appreared to be superior to that of comparable halfsib family progeny, validating the existence of heterosis, which is expected due to the high degree of natural cross pollination observed. These data should serve as a benchmark upon which future progress iin varietal and pupulation develpment can be measured.
Keywords: Ácidos grasos.; Lesquerella; mejoramiento; Plantas oleaginosas.; Semillas oleaginosas.; Lesquerella