Genetic Analysis of Streaked and Abnormal Floret Mutant st-fon

doi:10.1016/S1672-6308(13)60132-8

摘要/Abstract

摘要：

A double mutant with streaked leaf and abnormal floret was found and temporarily named streaked leaf and floral organ number mutant (st-fon). For this mutant, besides white streak appeared on culm, leaves and panicles, the number of floral organs increased and florets cracked. The extreme phenotype was that several small florets grew from one floret or branch rachis in small florets extended and developed into panicles. By using transmission electron microscope to observe the ultrastructure of white histocytes of leaves at the seedling stage, the white tissues which showed abnormal plastids, lamellas and thylakoids could not develop into normal chloroplast, and the development of chloroplast was blocked at the early growth stage of plastid. Scanning electron microscope and paraffin section were also used to observe the development of floral organs, and the results indicated that the development of floral meristem was out of order and unlimited, whereas in the twisty leaves, vascular bundle sheath cells grew excessively, or some bubbly cells increased. Genetic analyses carried out by means of cross and backcross with four normal-leaf-color materials revealed that the mutant is of cytoplasm inheritance.

关键词: rice, streaked leaf, floral organ, floret, mutant, chloroplast, anatomical structure, plasmatic inheritance

CHEN De-xi, LI Ting, QU Guang-lin, HUANG Wen-juan, HE Zhong-quan, LI Shi-gui. Genetic Analysis of Streaked and Abnormal Floret Mutant st-fon[J]. RICE SCIENCE, 2013, 20(4): 267-275.

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