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International Scholarly Research Notices - Volume 2015 2015, Article ID 257417, 9 pages -

Research Article

Everglades Research & Education Center, 3200 E. Palm Beach Road, Belle Glade, FL 33430-4702, USA

USDA-ARS Sugarcane Research Unit, Houma, LA 70360, USA

Louisiana State University AgCenter Sugar Research Station, St. Gabriel, LA 70776, USA

Received 30 August 2014; Revised 15 December 2014; Accepted 21 December 2014

Academic Editor: Harsh Raman

Copyright © 2015 James Todd et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Sugarcane Saccharum L. spp. hybrids growers depend on breeding programs for new, high-yielding cultivars that have resistance to abiotic and biotic stresses, so breeders continually seek out widely adapted, high yielding germplasm to be used as parents for their programs. Cultivars are sometimes used for this purpose, but their use may be minimized to prevent genetic diversity erosion. The purpose of this study was to determine the importance of cultivars as parents in three USA one in Florida and two in Louisiana sugarcane breeding programs by quantifying the percentage of cultivars that had these parental groupings based on published registrations and crossing records. The percentage of cultivars with at least one commercial parent for each program was 81.8%, 77.5%, and 64.3% for the Houma Ho, Louisiana, Canal Point CP, Florida and Louisiana State University LSU programs, respectively, but cultivars were recently used as parents in only 11.8% Ho, 16.39% CP, and 34.3% LSU of crosses. The results indicate that the CP and Ho programs should consider increasing the use of cultivars as parents in their breeding programs to increase the probability of selecting potential commercial genotypes, but this should be balanced with high diversity crosses to avoid the loss of diversity.





Autor: James Todd, Barry Glaz, David Burner, and Collins Kimbeng

Fuente: https://www.hindawi.com/



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