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GrainGenes Reference Report: CRS-41-1390

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Reference	CRS-41-1390
Title	Grain fill duration in twelve hard red spring wheat crosses: Genetic variation and association with other agronomic traits
Journal	Crop Science
Year	2001
Volume	41
Pages	1390-1395
Author	Talbert LE Lanning SP Murphy RL Martin JM
Abstract	Summary: The rate and duration of grain fill period has been shown to be associated with increased yield in cereals when water deficits occur during maturation. Grain fill duration can be approximated as the time between heading date and physiological maturity, allowing measurements to be obtained for large breeding populations. Our objectives were to determine the genetic variation for grain fill duration, and to determine its association with agronomic traits in a set of spring wheat (Triticum aestivum L.) crosses. Fifty F(3.5) progenies from 12 spring wheat crosses plus parents were grown in replicated trials in three Montana environments. Heritabilities were consistently high across crosses for grain protein (mean = 0.92) heading date (mean = 0.89) and test weight (mean = 0.79), intermediate for physiological maturity (mean = 0.64) and grain yield (mean = 0.59) and lowest for grain fill duration (mean = 0.4). Earlier heading and later physiological maturity were associated with longer grain fill across crosses. Earlier heading also was often significantly correlated with higher grain protein concentration and higher test weight, but usually was not associated with grain yield. Longer grain fill duration was usually associated with higher grain protein in two environments, but with lower grain protein for the cool, wet environment. Grain fill duration showed no significant association with grain yield in most instances. Selection for early heading in early generations followed by selection for grain yield and grain fill duration in later generations using multilocation trials may circumvent the negative association between grain yield and grain protein
Keyword	[ Hide all but 1 of 64 ] agronomic characteristics agronomic trait association breeding cereal corn crop crop yield cross cultivar date deficit duration earliness environment filling period generation genetic genetic variation genotype genotype environment interaction grain grain protein grain protein concentration grain yield heading heading date heritability high-temperature stress intermediate linkage maize maturation maturity measurement montana multilocation trial periods population progeny protein protein concentration protein content rate red red spring wheat seed development seed weight selection spring spring wheat test weight trait trials triticum triticum aestivum variation water water deficit water stress weight wheat yield yield components

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