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Titolo:
F1 SEED PRODUCTION EFFICIENCY BY USING PHOTOPERIOD-SENSITIVE CYTOPLASMIC MALE-STERILITY AND PERFORMANCE OF F1-HYBRID LINES IN WHEAT
Autore:
MURAI K;
Indirizzi:
ISHIKAWA AGR COLL,RES INST AGR RESOURCES NONOICHI ISHIKAWA 921883 JAPAN
Titolo Testata:
Ikushugaku Zasshi
fascicolo: 1, volume: 48, anno: 1998,
pagine: 35 - 40
SICI:
0536-3683(1998)48:1<35:FSPEBU>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
AEGILOPS-CRASSA CYTOPLASM;
Keywords:
TRITICUM AESTIVUM; AEGILOPS CRASSA; PHOTOPERIOD-SENSITIVE CMS; HYBRID WHEAT; SEED PRODUCTION; HETEROSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
K. Murai, "F1 SEED PRODUCTION EFFICIENCY BY USING PHOTOPERIOD-SENSITIVE CYTOPLASMIC MALE-STERILITY AND PERFORMANCE OF F1-HYBRID LINES IN WHEAT", Ikushugaku Zasshi, 48(1), 1998, pp. 35-40

Abstract

Photoperiod-sensitive cytoplasmic male sterility (PCMS) caused by Aegilops crassa cytoplasm to common wheat (Triticum aestivum) under long-day conditions (115 h light period) has been reported as a new means of producing hybrid wheat, that is a ''two-line system''. The PCMS lineis maintained by self-pollination under short-day conditions (less than or equal to 14.5 h light period), and F-1 seeds can beproduced by outcrossing of the PCMS line with a pollinator under long-day conditions. A cross pollination study for producing F-1 seeds was carried out using three PCMS lines and three restorer lines under a long-day condition at Tanno, Hokkaido, Japan. Seed setting rate was 14-33 %, and 19-55 g/m(2) F-1 seeds with 47-88 % hybrid purity were obtained. Variationin seed setting rate attributable to male parents was highly significant. High seed setting rate was achieved by using a pollinator taller than the PCMS line. Shriveled and preharvest sprouting kernels were found in the outcrossed F-1 seeds, resulting in lower volume weight and germination rate than the selfed seeds of original cultivars of the PCMS lines. A field test of evaluating four F-1 hybrids with high hybridpurity (>65 %) was conducted under a short-day condition at Kasai, Hyogo, Japan. All F-1 hybrids exhibited higher grain yield than their respective better-parent because of more spikelet number/ear and higher 1000-grain weight. The top F-1 hybrid yielded 40 % more than the mid-parent and 37 % more than the better-parent, suggesting a possibility of the practical use of this system for hybrid wheat breeding. F-1 hybrids tended to show higher volume weight than their parental cultivars. This indicates that grain quality of the F-1 hybrids with the Ae. crassa cytoplasm is not inferior to those of parental cultivars with the wheat cytoplasm.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 15:55:11