Saline-alkali-tolerant barley breeding method

Abstract

The invention provides a saline-alkali-tolerant barley breeding method. The saline-alkali-tolerant barley breeding method comprises the following steps of: (1) collecting Tibetan wild barley resourcesfor hybridized combinations, and carrying out mixed harvesting to obtain stable filial generations; (2) sowing the stable filial generations obtained in the step (1) into severe saline-alkali soil, and watering the severe saline-alkali soil with local saline-alkali water to obtain barley seeds; and (3) planting the barley seeds obtained in the step (2) into local representative severe saline-alkali soil to carry out saline-alkali tolerance identification, watering the severe saline-alkali soil with the local saline-alkali water in a growth period, and harvesting the barley seeds with high saline-alkali tolerance in a mature period. According to the saline-alkali-tolerant barley breeding method, the Tibetan wild resource generations are applied to carry out saline-alkali tolerance selection, the local representative severe saline-alkali soil is selected through saline-alkali content analysis, a large number of genotype-rich stable high-generation strain materials are subjected to extremely strict field selection and are massively eliminated, and the later-stage selection pressure is reduced. The saline-alkali soil field selection is carried out instead of laboratory selection, thesaline-alkali-tolerant barley strain materials suitable for being planted in the local saline-alkali soil are easily selected, and the saline-alkali tolerance is not prone to being lost.

Description

technical field [0001] The invention relates to a method for breeding saline-alkali-tolerant barley. Background technique [0002] The stress-resistant genes of crops have been lost in the evolution of about 10,000 years, and most of the stress-resistant genes exist in wild species and local farm species. In the current crop salt-tolerant hybrid breeding, the genetic variation resources of many crop cultivars have been severely depleted, and this phenomenon generally exists in self-pollinated crops grown outside their origin. Bernstein, a member of the American Academy of Sciences, also pointed out that the only way to cultivate highly salt-tolerant crops is to use their wild salt-tolerant relative germplasm, and it is necessary to find wild plant salt-tolerant germplasm resources. my country's Tibet is one of the origins of barley, and barley germplasm resources are abundant. Selection of Tibetan wild barley hybrids for saline-alkali tolerance breeding, an attempt to improv...

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Problems solved by technology

[0003] At the same time, many laboratories in the world have obtained salt-tolerant barley varieties under laboratory conditions, but lost their salt tolerance when they were cultivated in saline-alkali land (Nevo and Chen, 2010)

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