Premium
Evaluation of forage yield performance in advanced generations of a timothy “clone and strain synthesis” strain
Author(s) -
Tanaka Tsuneki,
Tamaki Hiroyuki,
Ashikaga Kazunori,
Fujii Hiroki,
Sato Koichi,
Iwabuchi Kei,
Adachi Mieko
Publication year - 2013
Publication title -
grassland science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.388
H-Index - 19
eISSN - 1744-697X
pISSN - 1744-6961
DOI - 10.1111/grs.12032
Subject(s) - forage , yield (engineering) , perennial plant , biology , dry matter , strain (injury) , inbreeding depression , clone (java method) , agronomy , zoology , inbreeding , botany , genetics , demography , physics , gene , population , sociology , anatomy , thermodynamics
Clone and strain synthesis ( CSS ) is similar to variety synthesis to boost improvement of yield in perennial self‐incompatible forage grasses such as timothy ( P hleum pratense L .). This study was undertaken to investigate the scale of inbreeding depression in advanced generations of CSS . The second to fourth synthetic generations ( S yn2–4) of timothy CSS strain, ‘ K itakei 04306,’ were compared for cumulative annual dry matter yields ( DMY s) 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 S yn2–4) with the advance of generations. Furthermore, DMY of S yn4, 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 ‘ K itakei 04306.’ A risk of severe yield decrease in CSS could not be shown in our limited experiments.