Evaluation of forage yield performance in advanced generations of a timothy "clone and strain synthesis" strain. (26th November 2013)

• Record Type: Journal Article
• Authors: Tanaka, Tsuneki; Tamaki, Hiroyuki; Ashikaga, Kazunori; Fujii, Hiroki; Sato, Koichi; Iwabuchi, Kei; Adachi, Mieko
• Is Part Of: Grassland science. Volume 59:Number 4(2013:Dec.)
• Page Start: 221
• Page End: 225
• Publication Date: 2013-11-26
• Subjects: Grasslands -- Periodicals; Grasslands -- Management -- Periodicals; 578.74
• DOI: 10.1111/grs.12032
• Languages: English
• ISSNs: 1744-6961

Abstract

<abstract abstract-type="main" id="grs12032-abs-0001"> <title>Abstract</title> <p>Clone and strain synthesis (CSS) is similar to variety synthesis to boost improvement of yield in perennial self‐incompatible forage grasses such as timothy (<italic>Phleum pratense </italic>L.). This study was undertaken to investigate the scale of inbreeding depression in advanced generations of CSS. The second to fourth synthetic generations (Syn2–4) of timothy CSS strain, 'Kitakei 04306, ' were compared for cumulative annual dry matter yields (DMYs) and some agro‐morphological characteristics of 2009–2011. No significant difference was found among the generations for any examined characteristic, aside from a slight yield decrease (–1.7% for Syn2–4) with the advance of generations. Furthermore, DMY of Syn4, corresponding to a generation propagated as commercial seeds, remained 9.0% higher than that of its pollen parent. These results indicate the yield superiority of 'Kitakei 04306.' A risk of severe yield decrease in CSS could not be shown in our limited experiments.</p> </abstract>