The Relationship Between Physiological Characteristics and Spike Grain Weight of Wheat Varieties of Different Source-sink Types

doi:10.3321/j.issn:1000-7091.2000.01.004

Abstract

Abstract: The research was carried out on the relationships between physiological characteristics and spike kernel weight of different types by using new big kernel wheat strain Lankao 86(79) (source-limiting type)、Yumai 18 (sink-limiting type) and new big spike wheat strain Huang 8124 (source-sink-interacting type) as test materials. The main results was as follows: (1) The sources formation and development of source-limiting type and source-sink-interacting type varieties is more reasonable than sink-limiting type one. They have bigger photosynthetic superiority, longer continued time of leaf area, higher photosynthetic reduction efficiency, stronger photosynthetic property of leaves.(2) Source-limiting type and source-sink-interacting type varieties grain weight increases quickly, their spike characters are superior to sink-limiting type one. (3) Leaves of source-limiting type variety、leaf sheaths of source-sink-interacting type one、stem of sink-limiting type one contribute more to kernel's increasing weight than other organs. (4) Kernel milking speed of source-limiting type and source-sink-interacting type varieties increases quickly in earlier stage and decreases slowly in later stage, it presented significant positive correlation between grain weight and milking speed, but to the sink-limiting type variety, this correlation isn't evident.

Key words: Wheat, Source-sink relationship, Physiological characteristic, Spike grain weight

CLC Number:

S512.101

GAO Songjie, WANG Wenjing, CHEN Shiliang. The Relationship Between Physiological Characteristics and Spike Grain Weight of Wheat Varieties of Different Source-sink Types[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2000, 15(1): 17-21. doi: 10.3321/j.issn:1000-7091.2000.01.004.

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