Method for screening and breeding excellent winter wheat plants

An excellent technology for winter wheat, applied in the field of screening and breeding of excellent plant types of winter wheat, can solve the problems of lack of comparison of the importance of different indicators, lack of systematic construction of excellent plant types, etc. high effect

Active Publication Date: 2016-06-15
CROP RES INST SHANDONG ACAD OF AGRI SCI +1
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Problems solved by technology

[0007] In the previous studies, the research was carried out from the indicators of plant height, stalk length and dry weight, but there was no systematic construction of excellent plant type, or the indicators of rational plant type were generally pointed out, and the importance comparison of different indicators was lacking.

Method used

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  • Method for screening and breeding excellent winter wheat plants
  • Method for screening and breeding excellent winter wheat plants
  • Method for screening and breeding excellent winter wheat plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 typical variety field planting

[0050] 25 typical varieties that were popularized and planted on a large scale during the eight varieties replacements in Shandong Province since the founding of the People's Republic of China were selected as test materials (Table 1). The experiment was planted in Taian, Dezhou, and Heze for two years in 2010-2011 and 2011-2012 respectively, arranged in random blocks and repeated 3 times. Field management measures are carried out according to general high-yield fields.

[0051] Table 1 Typical varieties of wheat in Shandong Province since the founding of the People's Republic of China

[0052]

Embodiment 2

[0053] The investigation of embodiment 2 agronomic traits

[0054] The investigation and determination of the yield and important agronomic traits of the materials refer to the agricultural industry standard of the People's Republic of China "Technical Regulations for Regional Tests of Crop Varieties Wheat" (NY / T1301-2007). After the seedlings turn green, set up nylon nets in time to prevent lodging, so as to give full play to the yield potential of each variety.

[0055] Determination of stem internode length, internode diameter, and internode weight: strip off the stem sheath, measure the stem internode length, stem diameter, and internode weight with a ruler, vernier caliper, and balance.

Embodiment 3

[0056] Example 3 Analysis of the evolution of stem characteristics in the process of Shandong wheat variety replacement

[0057] Depend on Figure 1-18 , Table 2-5, it can be seen that since the founding of the People's Republic of China, the length of each internode of the wheat varieties popularized in Shandong Province has shown a downward trend, the internode diameter has gradually increased, and the internode weight has increased except the dry weight of the lower node. In addition, other sections showed a gradual downward trend. The shortening of the internode length is mainly due to the application of the dwarf gene in wheat varieties. Compared with the early varieties, the length of the lower node, the second node, the third node, the fourth node, and the fifth node of the modern variety are reduced by 31.5% and 35.8%, respectively. %, 49.5%, 50.6%, 29.8%. In recent years, the plant height of varieties planted on a large scale in Shandong Province has remained between...

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Abstract

The invention belongs to the field of genetic breeding, and in particular relates to a method for screening and breeding excellent winter wheat plants. Typical varieties which are popularized to be planted in a large area in a variety replacement process are selected as test materials to be planted; agronomic characters, in particular stalk characters, are investigated, to fit a curve that the stalk characters are changed along the year; correlation coefficients of the stalk characters to the yield, the biomass yield and the harvesting index are inspected to perform multiple stepwise regression and path analysis on morphological characters of stalks and search key factors for seed yield; and three key factors for the seed yield include internode length below the spike, length of the last two nodes and dry weight of the internode.

Description

technical field [0001] The invention belongs to the field of genetic breeding, and in particular relates to a screening and breeding method for excellent plant types of winter wheat. Background technique [0002] Wheat is one of the most important food crops in the world, its yield is second only to rice and corn, and it is the third largest food crop in my country. Wheat is one of the most important food crops because it feeds 40% of the world's population and provides 20% of human energy and protein supply. [0003] Increases in wheat grain yield potential in modern times are mainly manifested by increases in harvest index, from 30-35% in early landraces to 40-50% in modern high-yielding varieties, with little change in biological yield. To further increase yield mainly depends on the coordinated improvement of harvest index and biological yield. Foreign scholars divide the varieties into three types according to the harvest index and biological yield: the first category...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04
CPCA01H1/04
Inventor 宋健民余晓丛程敦公李豪圣刘爱峰曹新有王灿国郭军刘建军赵振东
Owner CROP RES INST SHANDONG ACAD OF AGRI SCI
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