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Cross breeding process of trilinear cotton hybrid with chicken foot leaf mark

A hybrid cotton and hybrid breeding technology, which is applied in the field of crop genetics and breeding, can solve the problems of low seed production yield, low seed production yield and weak resilience of hybrid seeds.

Inactive Publication Date: 2004-04-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1970s, Meyer (1973) bred and distributed male sterile lines with Harknessii Cotton (G. Can realize the industrialization of three-line hybrid cotton seeds
If the sterile line cotton plant does not get pollen, its cotton bolls will fall off, and the seed production yield of the final hybrid seed will not be high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] 1) Using the cytoplasmic male sterile line "Zhong 12A" as the female parent and the upland cotton line "Chicken B" containing the dominant chicken foot leaf gene (L°) as the male parent, the hybrid F was obtained by sexual crossing 1 ——→ with F 1 The sterile plant is used as the female parent, and the chicken leg leaf line chicken B is used as the recurrent parent, and backcrossing is carried out—→In the obtained backcross generation, an excellent chicken leg leaf sterile single plant is selected for the second backcross with the recurrent parent—— →Continuous selection and backcrossing for more than 5 generations in this way, the sterile line of chicken feet and leaves obtained is "chicken A", and the corresponding recurrent parent chicken B is the maintainer line of chicken A. Using the cytoplasmic male restorer line "Zheda Qianghui" as the female parent and the upland cotton line containing the dominant chicken foot leaf gene (L°) as the male parent, the hybrid F 1 ...

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PUM

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Abstract

The present invention discloses cross breeding process of trilinear cotton hybrid with chicken foot leaf mark. The chicken foot leaf mark character is transferred into cotton cytoplasm male sterile line and restoring line to breed chicken foot leaf sterile line and restoring line; the seed of chicken foot sterile line and that of normal leaf restoring line are mixed in certain ratio or the seed of normal leaf sterile line and that of chicken foot leaf restoring line are mixed in certain ratio; and the hybrid seed on sterile line cotton plant and the selfing seed on restoring line cotton plant are distinguished and harvested according to chicken foot leaf character to produce semi-chicken foot leaf type cotton hybrid. The present invention raises natural catabolic rate and yield of hybrid seed via shortening the pollination distance between the plant of sterile line and that of restoring line.

Description

technical field [0001] The invention relates to genetic breeding of crops, in particular to a method for seed production of three-line hybrid cotton marked with chicken feet leaves. Background technique [0002] Heterosis is a common phenomenon in the biological world. The crops have obvious heterosis, and the yield of hybrids is often more than 15% higher than that of purebreds. The use of heterosis is one of the important means to improve crop yield, quality and resistance nowadays. The high yield and high quality brought about by the heterosis of crops such as corn, rice, rapeseed, sorghum have made great contributions to world food security. [0003] Three lines, namely male sterile line, maintainer line and restorer line, are systems for hybrid seed production (seed production) using plant cytoplasmic male sterility. The three lines should be fertile. The sterile line itself cannot produce active pollen grains. Its reproduction is realized th...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 王学德朱云国
Owner ZHEJIANG UNIV
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