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Increased kernel number in Norin 10-derived dwarf wheat: evaluation of the cause

By: Contributor(s): Material type: ArticleArticlePublication details: 1986ISSN:
  • No (Revista en electrónico)
  • 0310-7841
Subject(s): DDC classification:
  • 95-065555
 In: Australian Journal of Plant Physiology v. 13, no. 6, p. 767-78495-065555, 611396Summary: Near-isogenic pairs of spring wheat, differing in the presence or absence of both dwarfing genes, were grown in a controlled environment. The dwarf wheats had a higher proportion of shoot dry weight in the spike at anthesis. Stems of dwarf genotypes were somewhat shorter as early as 50 days before anthesis (i.e. before floral initiation) but relative differences became especially great commencing at 35 days before anthesis. Apex and spike lengths were never very different. A greater proportion of dry matter was distributed to leaf lamina from 50 days before anthesis until the end of lamina growth in dwarf wheats, while partitioning to stems was lower from 50 days before anthesis onwards. Partitioning to spikes was only higher in the 15 days preceding anthesis. Stem water-soluble carbohydrate (WSC) contents at anthesis were greater in dwarf wheats but maximum spike WSC contents reached at about 15 days before anthesis were lower. The major unique feature of dwarf genotypes, the higher proportion of dry matter partitioned to the spike, appeared to be due to reduced competition from growing stems in dwarf wheats rather than intrinsic differences in the growth potential of their spikes
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Holdings
Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Article CIMMYT Knowledge Center: John Woolston Library AGRIS Collection 95-065555 (Browse shelf(Opens below)) 1 Available 95-065555
Article CIMMYT Knowledge Center: John Woolston Library AGRIS Collection 95-065555 (Browse shelf(Opens below)) 2 Available 611396
Total holds: 0

7 graphs, 5 tables, 23 ref. Summary (En)

Near-isogenic pairs of spring wheat, differing in the presence or absence of both dwarfing genes, were grown in a controlled environment. The dwarf wheats had a higher proportion of shoot dry weight in the spike at anthesis. Stems of dwarf genotypes were somewhat shorter as early as 50 days before anthesis (i.e. before floral initiation) but relative differences became especially great commencing at 35 days before anthesis. Apex and spike lengths were never very different. A greater proportion of dry matter was distributed to leaf lamina from 50 days before anthesis until the end of lamina growth in dwarf wheats, while partitioning to stems was lower from 50 days before anthesis onwards. Partitioning to spikes was only higher in the 15 days preceding anthesis. Stem water-soluble carbohydrate (WSC) contents at anthesis were greater in dwarf wheats but maximum spike WSC contents reached at about 15 days before anthesis were lower. The major unique feature of dwarf genotypes, the higher proportion of dry matter partitioned to the spike, appeared to be due to reduced competition from growing stems in dwarf wheats rather than intrinsic differences in the growth potential of their spikes

English

MIC 7571-R

AGRIS Collection


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