Knowledge Center Catalog

Physiological basis, QTL, and MAS of the stay-green drought resistance trait in grain sorghum

By: Contributor(s): Material type: TextTextPublication details: Mexico, DF (Mexico) CIMMYT : 2000ISBN:
  • 970-648-052-8
Subject(s): DDC classification:
  • 631.53 RIB
Summary: Stay-green is a drought-resistance trait in grain sorghum. When water is limited during the grain filling period, genotypes possessing this trait maintain more photosynthetically active leaves compared with genotypes not possessing this trait. An improved understanding of the physiological basis of stay-green was sought. Higher grain yield in stay-green compared with senescent genotypes was associated with increased green leaf area at maturity, leaf nitrogen status, and transpiration efficiency. Three genomic regions located on linkage groups B, G, and I were identified for QTL associated with stay-green, accounting for 14.4%, 10.2%, and 10.1% of the variation, respectively. One of the markers identified for stay-green on linkage group B is a PCR-based SSR marker that could be readily used in breeding programs.
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Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library CIMMYT Publications Collection 631.53 RIB (Browse shelf(Opens below)) 1 Available R629165
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Stay-green is a drought-resistance trait in grain sorghum. When water is limited during the grain filling period, genotypes possessing this trait maintain more photosynthetically active leaves compared with genotypes not possessing this trait. An improved understanding of the physiological basis of stay-green was sought. Higher grain yield in stay-green compared with senescent genotypes was associated with increased green leaf area at maturity, leaf nitrogen status, and transpiration efficiency. Three genomic regions located on linkage groups B, G, and I were identified for QTL associated with stay-green, accounting for 14.4%, 10.2%, and 10.1% of the variation, respectively. One of the markers identified for stay-green on linkage group B is a PCR-based SSR marker that could be readily used in breeding programs.

English

0101|AL-ABC Program|AGRIS 0101

Jose Juan Caballero

CIMMYT Publications Collection


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