A method for increasing the total grain number per panicle of two-line hybrid early indica rice
An early indica rice, the technology of total grain number, applied in the direction of botany equipment and method, plant gene improvement, application, etc., can solve the problem that the method of increasing the total grain number of two-line hybrid early indica rice has not yet been improved, and achieve the purpose of improving seed reproduction and seed production efficiency, high yield, and the effect of increasing the total number of grains per panicle
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Embodiment 1
[0020] (1) The early indica rice "Zhe 17104" (a strain selected by Zhejiang Academy of Agricultural Sciences, purchased from Zhejiang Academy of Agricultural Sciences) with 2 clusters on top spikelets was selected as the male parent. Zhejiang 17104 characteristics: the whole growth period is about 110 days, the plant height is about 89.3cm, the effective panicles per mu are about 216,000, the panicle length is about 16.5cm, and 2 grains of rice grow side by side on the top of each small branch; the total number of grains per panicle is about 133.4 grains, about 109.5 grains per panicle, about 82.1% seed setting rate, about 25.8g thousand-grain weight, oval grain shape, suitable for processing and other purposes.
[0021] (2) Xiangling 628S was selected as the female parent of the two-line CMS hybrid.
[0022] (3) Hybridization and preparation of two-line hybrid early indica rice combination "Lingliangyou 17014" (Xiangling 628S×Zhe 17104). The two-line hybrid early indica rice...
Embodiment 2
[0026] (1) In 2014, "Xiangling 750S" was used as the female parent, and the early indica rice "Zhe 17104" (a strain selected by the Zhejiang Academy of Agricultural Sciences and purchased from Zhejiang Academy of Agricultural Sciences) was used as the male parent for hybridization, with the selection criteria for the two-line CMS and the traits of clustering 2-4 grains on top spikelets as the breeding targets, and the cluster-type two-line CMS was selected generation by generation. The two-line male sterile line material "4528S" with two clustered spikelets was produced.
[0027] (2) "4528S" was selected as the female parent, and "05YP16" (the conventional early indica rice material selected by Zhejiang Academy of Agricultural Sciences, which is the male parent of the two-line early indica hybrid rice "Lingliangyou 0516") was selected as the male parent.
[0028] (3) Two-line hybrid early indica rice combination "4528S×05YP16" was prepared by hybridization, and the two-line hy...
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