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Method for selecting and breeding aggregate maize inbred lines with large-ear and quick dehydration characters

A technology of inbred lines and traits, applied in the directions of botanical equipment and methods, applications, and plant genetic improvement, can solve the problems of energy consumption, easily broken grains, and high water content of grains, to simplify the breeding program, speed up the breeding process, The effect of improving screening efficiency

Active Publication Date: 2019-05-07
NANTONG XINDAO BREEDING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current domestic hybrid corn species are basically not suitable for mechanized operations. The main problems are: tall plants, late maturity, thick stems, thick shafts and thick leaves, tight bracts, high grain water content, energy-consuming mechanical harvesting, and easily broken grains.

Method used

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  • Method for selecting and breeding aggregate maize inbred lines with large-ear and quick dehydration characters
  • Method for selecting and breeding aggregate maize inbred lines with large-ear and quick dehydration characters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] according to figure 1 The flow shown is for the selection of maize inbred line TM5128:

[0044] In the spring of 2015, hybridization was carried out with PH6WC as the female parent and A489 as the male parent to obtain F1 generation seeds.

[0045] In 2015, the F1 generation seeds were propagated in Hainan to obtain the F2 generation seeds (that is, the S1 generation seeds).

[0046] In the spring of 2016, the S1 generation seeds were sown at a density of 8,000 plants / mu, ensuring 2,100 plants for each group. After planting, 10% of the early flowering plants were self-pollinated, and 3% of the single panicles were selected. A total of 57 single panicles were screened out, and the seeds were collected to obtain the S2 generation seeds.

[0047] In the autumn of 2016, sow S2 generation seeds at a density of 8,000 plants / mu. According to the emergence rate, emergence potential, seedling growth and panicle row uniformity, 20-40% of the panicle rows were eliminated before ...

Embodiment 2

[0054] according to figure 2 The flow shown is for the selection of maize inbred line RD6013:

[0055] In the spring of 2014, 4S was used as the female parent and -MBST was used as the male parent for crossing to obtain F1 generation seeds.

[0056] In 2014, the F1 generation seeds were propagated in Hainan to obtain the F2 generation seeds (that is, the S1 generation seeds).

[0057] In the spring of 2015, the S1 generation seeds were sown at a density of 8,000 plants / mu, with a population of 1,650 plants. After planting, 10% of the early flowering plants were self-pollinated, and 3% of the single panicles were selected. A total of 51 single panicles were selected, and the seeds were collected to obtain the S2 generation seeds.

[0058] In the autumn of 2015, sow S2 generation seeds at a density of 8,000 plants / mu. According to the emergence rate, emergence potential, seedling growth and panicle row uniformity, 20-40% of the panicle rows were eliminated before pollination, a...

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Abstract

The invention provides a method for selecting and breeding aggregate maize inbred lines with large-ear and quick dehydration characters, and relates to the technical field of maize breeding. The method has the advantages that large-ear selection paths are changed, in other words, fine-axis, deep-kernel or long-kernel large ears are selected instead of the original thick ears and shallow-kernel large ears, accordingly, adverse association between large ears and quick dehydration can be solved, maize breeding programs can be simplified, the dominant combination matching efficiency can be improved, and maize commercial breeding progress can be greatly promoted.

Description

technical field [0001] The invention belongs to the technical field of corn breeding, and in particular relates to a method for breeding corn inbred lines with aggregated large panicle and fast dehydration traits. Background technique [0002] Troyer et al. (2009) in the United States used independent research literature to analyze the variation of hybrid yield, inbred line yield and heterosis yield with years in the process of maize genetic improvement. Using Schnell's (1974) data, the increases in parental inbred line yield, heterosis yield, and hybrid yield were 168.9, 48.1, and 217 kg / hm per year, respectively. 2 ; Using the data of Duvick (1999) and Troyer (2009), the yield increases of the three species were 48.3, 25.8, and 74.0 kg / hm per year, respectively 2 . The contribution of inbred line improvement to hybrid yield was 77.8% and 65.3%, respectively. According to Mikel (2008) data, there is a very significant positive correlation between the yield of commercial ...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 崔士友彭长俊
Owner NANTONG XINDAO BREEDING TECH CO LTD
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