Search Results

You are looking at 11 - 20 of 713 items for :

  • "systematics" x
  • Refine by Access: All x
Clear All
Free access

Hongrun Yu and Thomas M. Davis

As part of a strawberry (Fragaria sp.) genome mapping project, we studied the linkage relationship between runnering and phosphoglucoisomerase PGI-2 allozymes in diploid strawberry. The respective r and Pgi-2 loci were found linked with a recombination frequency of 18.1% ± 1.6%(a map distance of 18.9 ± 1.6 cM). This is the second reported linkage in strawberry. The linkage between runnering and phosphoglucoisomerase allozymes, if conserved at the octoploid level, might provide a means of marker-assisted selection for the nonrunnering and bushy branching growth habits in cultivated strawberry. Severe distortion of monogenic segregation ratios was observed for runnering and PGI-2, and also for an unlinked locus for shikimate dehydrogenase allozymes. Alleles from the perpetual flowering (alpine F. vesca) parents were favored in this distortion. This phenomenon should be considered in future genetic studies using crosses between alpine and nonalpine strawberries.

Full access

Elsa Sánchez and Richard Craig

Plant systematics is a sophomore level, 3-credit, required course for undergraduate students majoring in horticulture offered through the Department of Horticulture at The Pennsylvania State University. The course consists of twice weekly lecture

Full access

Elsa Sánchez and Richard Craig

management ( Murano and Knight, 1999b ). Cooperative learning activities also can encourage student independence and self-directedness ( Pennington, 2004 ). The plant systematics course offered through the Department of Horticulture at The Pennsylvania State

Free access

Chengyan Yue, R. Karina Gallardo, James Luby, Alicia Rihn, James R. McFerson, Vicki McCracken, David Bedford, Susan Brown, Kate Evans, Cholani Weebadde, Audrey Sebolt, and Amy F. Iezzoni

breeding a new apple cultivar is a complex problem. One solution is to systematically obtain input from the supply chain. In this study, we collected apple producers’ rankings of importance for fruit quality and tree traits using an audience survey, a

Free access

Jacob Mashilo, Hussein Shimelis, Alfred Odindo, and Beyene Amelework

South Africa, there is no recent and detailed information regarding its systematic characterization using molecular markers. Genetic diversity analysis using molecular markers may effectively characterize the South African bottle gourd landraces for

Free access

Cary A. Mitchell

systematically to turn out statistically validated, peer-reviewed publications that are incremental contributions, and training researchers who will become future experts on LED applications for horticulture. How commercial product specifications come about

Free access

Sandra B. Wilson and Luke Flory

material, the multiple-entry process of FloraGator has created a powerful online learning tool for anyone studying botany, plant identification, and plant systematics. By selecting from a database of 220 features specific to the habit, leaves, flowers

Open access

Ting Liao, Guobin Liu, Liqin Guo, Ye Wang, Yanwu Yao, and Jun Cao

( Zhang et al., 2017 ). Embryonal development revealed the annual cycle of ovulate cone development in Pinus sibirica in the western Sayan Mountains ( Tretyakova et al., 2004 ). An embryological study revealed the systematic significance of the primitive

Free access

Lorenzo León, Raúl de la Rosa, Diego Barranco, and Luis Rallo

yield of the individual seedlings in the first three harvest seasons were recorded ( León et al., 2004b ). In the comparative field trial orchard containing the 15 selections and the three genitors, plants were systematically evaluated for earliness of

Full access

Elizabeth Duncan, Ann Marie VanDerZanden, Cynthia Haynes, and Levon Esters

Outcomes assessment is a process used to continually improve student learning by systematically assessing the effectiveness of and adjusting the curriculum. Outcomes assessment provides a way for students to show their achievement of learner