Title: Effects of Root Characteristics of the Population of Recombinant Inbred Lines Derived from Zhenshan 97/Minghui 63 on Grain Yield
Abstract: To illustrate the root characteristics of high-yielding rice and provide further experimental base for the genetic improvement of rice root traits, the population of 204 recombinant inbred lines (RILs, F_(12), F_(13)) derived from Zhenshan 97/Minghui 63, an elite Indica hybrid rice combination in China, was solution-cultured and the relationship between yield formation and root morphological and physiological traits was systematically analyzed. The results showed as follows: (1) The major root characters which significantly affected grain yield in RIL population were: root activity per plant, root activity per spikelet, root dry weight per plant, length of the longest adventitious root, length of mode roots, length and thickness per adventitious root, among which root activity per plant had the most significant effect on grain yield. Raising root activity per plant, root dry weight per plant, length of the longest adventitious root and thickness per adventitious root resulted in significant increase of grain yield in RILs, while increase in root activity per spikelet, length per adventitious root and length of mode roots could lead to obvious decrease of grain yield in this population.(2) Grain yield of high-yielding lines in RIL population could be enhanced by raising root dry weight per plant, dry weight per adventitious root, root dry weight per unit length and root activity per plant. Raising root activity per spikelet could significantly increase grain yield of high-yielding lines but decrease grain yield of low-yielding lines in RIL population. Root dry weight per plant had a positive correlation with grain yield in high-yielding lines, while the number of adventitious roots per plant had the same important effect on grain yield in low-yielding lines.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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Cited By Count: 1
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