Method for improving photoperiod sensitivity of tropical maize germplgasm yellow grain Tuxpeno

A photoperiod and maize technology, applied in the field of maize genetics and breeding, can solve the problems of very similar maize varieties and serious variety assimilation, and achieve the effects of improving photoperiod sensitivity, compressing population size, and improving adaptability

Inactive Publication Date: 2015-06-24
FOOD CROPS RES INST YUNNAN ACADEMY OF AGRI SCI
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Problems solved by technology

[0008] The technical problem to be solved in the present invention is to overcome the prior art to introduce the tropical and subtropical germplasm into the temperate zone germplasm. The maize germplasm selected from the tropical maize germplasm background still has a strong photoperiod response, which cannot be solved.

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  • Method for improving photoperiod sensitivity of tropical maize germplgasm yellow grain Tuxpeno

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Embodiment 1

[0039] Embodiment 1 Breeding of photoperiod insensitive maize inbred line YML102 based on temperate germplasm background (method of the present invention)

[0040] Yellow grain Tuxpeno B.P.C.15 has the characteristics of high yield potential, dense tolerance, firm stalk, small spot resistance, barren and drought resistance, and wide adaptability, but it is a photoperiod sensitive maize germplasm, and the average growth period of planting in temperate regions is 140 days The plant height is about 2.8m; LM2 is a temperate early-maturing dent maize germplasm with a growth period of about 60 days and a plant height of about 1.3m.

[0041] see figure 1 The technical route shown, (1) material selection: improve the photoperiod sensitivity of the tropical maize germplasm yellow grain Tuxpeno B.P.C.15 with the temperate zone extra early maturing dent maize germplasm LM2 of France Limaglan Company, in the summer of 2008 In Kunming City, Yunnan Province, a hybrid combination Huangli Tu...

Embodiment 2

[0061] Breeding and testing (validation test) of embodiment 2 photoperiod insensitive maize hybrid combination YR407 and YR668

[0062] In the winter of 2012, 124 hybrid combinations were prepared with the inbred line YML102 in Xishuangbanna, Yunnan Province.

[0063] In the summer of 2013, the photoperiod sensitivity and comprehensive performance of hybrid combinations were identified at three points (multiple points) in Dehong Dai and Jingpo Autonomous Prefecture of Yunnan Province (tropical), Kaiyuan City of Yunnan Province (subtropical zone) and Zhaotong City of Yunnan Province (temperate zone). The results showed that the photoperiod-insensitive maize inbred line YML102 and the tropical maize inbred line YML112, the hybrid YR407 and the temperate maize inbred line YML168, the hybrid YR668, had no obvious differences in the above three different ecological environments. The photoperiod response of YR407, in which the growth period of YR407 in different ecological environme...

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Abstract

The invention discloses a method for improving the photoperiod sensitivity of a tropical maize germplgasm yellow grain Tuxpeno. The method comprises the following steps: improving the photoperiod sensitivity of a tropical maize germplgasm yellow grain Tuxpeno B.P.C.15 by using a temperate specially-early mature dent maize germplgasm LM2, adopting a breeding selection method including processes of performing hybridization, mixed pollination, two-round back-crossing and continuous three-generation selfing, performing growth period and plant height selection as well as combining ability early generation test, and synchronously performing photoperiod sensitivity identification in a plurality of places in a tropical zone, a subtropical zone and a temperate zone, and especially continuously performing two rounds of back-crossing by taking the temperate specially-early mature dent maize germplgasm LM2 as a back-crossing parent so as to ensure that the proportion of a temperate maize germplasm can be increased, and a maize selfing line which takes a temperate maize germplasm background as the main and integrates the tropical germplasm characteristics and temperate germplasm advantages can be obtained. By adopting the method disclosed by the invention, the problem of photoperiod sensitivity commonly existing in a process of planting the tropical maize germplasm in a temperate area can be effectively solved; and the method also has important significance in promoting the northward migration of maize varieties in the tropical zone and the subtropical zone in China.

Description

technical field [0001] The invention belongs to the field of corn genetic breeding. In particular, it relates to improving the photoperiod sensitivity of the tropical maize germplasm Tuxpeno B.P.C.15 by using the temperate extra-early-maturing dent maize germplasm LM2 of the French Limagrain Company. Background technique [0002] The problem of narrow maize germplasm base has attracted worldwide attention. The narrow genetic base of germplasm and the lack of germplasm resources have become the primary limiting factors for the sustainable development of maize breeding research and production in my country. Tropical and subtropical maize germplasm is rich in genetic variation, and has stress resistance that many temperate zone germplasms do not have, such as well-developed root system, resistance to diseases and insect pests, high temperature resistance, strong drought resistance, etc. important germplasm resources. However, tropical and subtropical maize germplasms are sens...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 番兴明刘丽陈洪梅徐春霞
Owner FOOD CROPS RES INST YUNNAN ACADEMY OF AGRI SCI
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