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Grain filling and shoot growth of 2-row and 6-row winter barley varieties

Abstract : The growth of the grain and shoots of 36 barley (Hordeum vulgare L) genotypes (18 2-row and 18 6-row) has been studied in northern France. A linear model showed that there was genotypic variation in both rate and duration of grain filling (GF) and shoot growth (SG). GF rate per grain was closely associated with kernel weight (r = 0.584** and r = 0.824** for the 2-row and the 6-row varieties respectively). A strong negative phenotypic correlation was, however, found between GF rate per grain and duration for the 2-row genotypes (r = - 0.712**). The SG and GF rates for the majority of genotypes were similar. On average, the GF rate of 6-row was, however, higher than their SG rate (2.11 against 1.93 g.m-2). The translocation of assimilates previously stored in vegetative parts may then explain the higher yield of 6-row genotypes. On average, SG stopped before GF and the means for the 2- and the 6-row varieties were not significantly different.
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  • HAL Id : hal-02704200, version 1
  • PRODINRA : 100782

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Jacques Le Gouis. Grain filling and shoot growth of 2-row and 6-row winter barley varieties. Agronomie, EDP Sciences, 1993, 13 (6), pp.545-552. ⟨hal-02704200⟩

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