| Characterizations of grain-filling and yield in malting barley cultivars of different genotypes |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.045 |
| Key Words: malting barley genotype cultivar grain-filling characteristic yield characteristic |
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| Abstract: |
| Mon-factor Randomized Complete Block Design (RCBD) experiment was conducted to analyze the indexes including grain-filling and yield characteristics of nine malting barley cultivars. Results indicated that the grain-filling processes in malting barley cultivars of different genotypes exhibited changes in an S-like shape, relationship of theirs between days after flowering and thousand grain weight all best fitted the Logistic Growth Equation (LGE), and the variations of their grain-filling rates were all in slow-fast-slow trend. The gain of grain weight happened earlier in cultivars with tall plant and wide flag leaf than others. Filling rate reached its only peak earlier in cultivars with strong tillering ability and wide flag leaf than other cultivars that owned two peak rates. The cultivars with moderate plant height, tillering ability, and flag leaf, retained a high filling rate for a relative long time. Among parameters related to filling characteristics, the grey correlation degrees between Rmax and yield, between R and thousand grain weight, and between C0 contribution and earlier growing stage, remained the highest. Ear length, grain weight per ear, and seeds per ear in cultivars with wide flag leaf, high tillering ability, and strong drought resistance, were found to reach their best levels, which might be advantageous in production and useful for breeding. The yields per unit area were high in 0110-16 and Ganpi 7 which could be extended for production. |
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