Selective breeding method of high-harvest-index fragrant rice-blast-resistant restorer line gui 5886

A harvest index and rice blast resistance technology, applied in the agricultural field, can solve the problem of the low proportion of rice blast resistant varieties, and achieve the effects of large ears and more grains, strong rice blast resistance and high harvest index.

Active Publication Date: 2020-11-10
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in recent years, the proportion of rice blast-resistant varieties bred in many places in my country is low, and most varieties are still susceptible varieties

Method used

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  • Selective breeding method of high-harvest-index fragrant rice-blast-resistant restorer line gui 5886
  • Selective breeding method of high-harvest-index fragrant rice-blast-resistant restorer line gui 5886

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Embodiment 1

[0025] A method for the selection and breeding of Gui 5886, a fragrant rice blast-resistant restorer line with a high harvest index, such as figure 1 As shown, it specifically includes the following steps:

[0026] (1) In the early season of 2012, Gui 582 was used as the female parent and Ba Guixiang was used as the male parent to cross hybrids, and F1 hybrids were harvested;

[0027] (2) In the late season of 2012, F1 materials were planted, and true hybrid plants were determined by molecular marker detection. The true hybrid plants were used as the female parent and Gui 582 as the male parent for backcrossing, and BC was harvested 1 f 1 seed;

[0028] (3) In the early season of 2013, plant BC 1 f 1 Materials, selected by molecular marker-assisted (hereinafter referred to as MAS) containing the target gene fgr, pita, pi1, pi5 The single plant was used as the female parent, Gui 582 was used as the male parent for backcrossing, and BC was harvested 2 f 1 seed;

[0029...

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Abstract

The invention provides a selective breeding method of high-harvest-index fragrant rice-blast-resistant restorer line gui 5886. The method is characterized in that hybridizing is conducted by taking gui 582 with high harvest index as a female parent and a fragrant rice variety "baguixiang" as a male parent, backcross is conducted twice by taking gui 582 as a recurrent parent, a segregation population is constructed, molecular marker assisted breeding is adopted, fragrance genes fgr and rice blast resistance genes pita, pi1 and pi5 are polymerized, and through conventional pedigree selective breeding, harvest index identification and rice blast resistance identification are achieved, and the high-harvest-index fragrant rice-blast-resistant restorer line rice variety is cultivated and named as gui 5886.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a breeding method of Gui 5886, a high-harvest index aroma-type blast-resistant restorer line Gui 5886. Background technique [0002] The rice harvest index refers to the ratio of rice yield to the total biomass production of aboveground parts. Rice harvest index is an important reflection of rice production efficiency. Under the condition of a certain overall biomass, increasing harvest index is an important way to increase yield. Every 0.1 percentage point increase in the harvest index means that the yield per hectare can be increased by 1500kg per season. Improving the harvest index of rice varieties is of great significance to increasing rice yield and ensuring national food security. [0003] The damage caused by rice blast causes about 18% of the global annual rice production loss. The northern and southern rice regions in my country are affected to varying...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 邓国富戴高兴梁海福周维永陈韦韦高利军高菊黄鹃卿冬进伍豪潘英华周萌陈仁天马志广陈荣林
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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