Search Results

You are looking at 1 - 10 of 7,392 items for :

Clear All
Free access

Jit B. Baral and Paul W. Bosland

The species status of two morphologically closely related species, Capsicum frutescens L. and C. chinense Jacq., was investigated using typological, phylogenetic, and biological species concepts. Diagnostic morphological differences, randomly amplified polymorphic DNA (RAPD) marker-based cluster analysis, and hybrid analyses were used to delimit C. frutescens and C. chinense. In many cases two morphological characters, calyx constriction and flower position, can separate accessions of C. frutescens from C. chinense. The RAPD-based analysis clearly separated accessions of C. frutescens and C. chinense into two distinct groups. The average genetic similarity within C. frutescens and C. chinense accessions was 0.85 and 0.8, respectively, whereas the average genetic similarity between C. frutescens and C. chinense accessions was only 0.38. The progenies obtained from C. frutescens and C. chinense hybridization had reduced fertility. Based on these evidences, C. frutescens and C. chinense represent two morphologically diagnosable, phylogenetically distinct, and reproductively isolated species.

Free access

Dale T. Lindgren and Daniel M. Schaaf

soil, climate, and moisture extremes. Cronquist et al. (1984) indicate that cross-breeding experiments could lead to reorganization in species classification in the genus Penstemon . Penstemon hybrids may also be valuable in determining

Free access

Xiaoying Li, Hongxia Xu, Jianjun Feng and Junwei Chen

), marker-assisted breeding ( Gutiérrez et al., 2011 ), and diversity and linkage map construction studies ( Chen et al., 2006 ; Pazos-Navarro et al., 2011 ). As a result of the lack of genomic information for most non-model plant species, it is expensive

Full access

John Erwin and Jonathan Hensley

, wind, and/or drought stresses are more severe and/or frequent on a rooftop than in-ground plantings ( Brown and Lundholm, 2015 ; Dunnett and Kingsbury, 2004 ; Shafique et al., 2018 ). Because weather can differ with region, which species perform well

Free access

Jeff B. Million and Thomas H. Yeager

investigated the capture of sprinkler irrigation by container-grown plants. Beeson and Knox (1991) reported CF less than 1 for two Rhododendron species and Pittosporum tobira indicating that these three species directed water away from the container. CF

Open access

Gregory T. Browne

More than 10 species of Phytophthora de Bary are reported to affect cultivated Prunus L. worldwide, causing root rot, crown rot, trunk and scaffold cankers, and even fruit rots ( Browne and Doster, 2002 ; Browne and Mircetich, 1995 ; Félix

Free access

Bruce L. Dunn and Jon T. Lindstrom

Trichostema L., a North American genus in the Lamiaceae family comprised of annual and perennial species, is found growing across the continental United States and extending north into Canada and south into Mexico ( Lewis, 1960 ). Of the

Full access

Weijian Cai, Jason D. Zurn, Nahla V. Bassil and Kim E. Hummer

season ( Sugiyama et al., 2004 ). Within the genus Fragaria , 22 species, multiple species hybrids, and numerous subspecies have been globally described ( Liston et al., 2014 ). Identification of flowering traits for individuals of these taxa could

Full access

M.A. Czarnota

objective of this research was to determine the highest rate of glyphosate that three different species of juniper could tolerate when glyphosate treatments were applied after the termination and maturity of the first flush of growth. Materials and methods

Full access

Alan W. Meerow, Stewart T. Reed, Christopher Dunn and Elena Schnell

different combination of volatile chemicals as the flower ages ( Liu et al., 2014 ; Steenhuisen et al., 2010 ). Day or night variation in scent components has been documented for several species. Dianthus inoxianus , snapdragon, Odontoglossum constrictum