방사선 조사에 의한 유채 M6~M7세대 변이계통의 특성
Characteristics of Mutant Lines through M6 to M7 Generation Induced by Radiation in Rapeseed (Brassica napus L.)
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To develop new varieties of rapeseed (Brassica napus L.), the seeds of three varieties,‘Naehan’, ‘Tammi’, and ‘Halla’ were irradiated with proton ion beams and gamma rays with 0 to2,000 Gy. We had selected 9 lines in M5 generation, and their useful characteristics were investigatedby progressing from M6 to M7 generation for checking uniformity and stability. The 9 lines selected inM5 generation were maintained their characteristics in terms of flowering date, maturing date, andplant height through M6 to M7 generations. Especially, 2 lines of NP600-1-1-198-2-1 and NP1000-13-2-362-4-1 selected in M5 generation derived from ‘Naehan’ had characteristics of early maturityand shorter stem than original variety, and they also were maintained characteristic of early maturitysuch as 10~11 days earlier flowering date and 6~9 days earlier maturing date through M6 toM7 generations. For stem length, they showed characteristics of shorter stem in 2 lines of NP600-1-1-198-2-1 line and NP1000-13-2-362-4-1 line about 16%, 25% shorter stem than original varietyrespectively through M6 to M7 generations. Furthermore, some characteristics of 2 lines comparedto the original variety were similar or higher in weight of 1,000 seeds, number of branches per plant,number of siliqua per panicle, number of seeds per silique, oil contents, and oleic acid contents. Theline with large and plump flowers selected in M5 generation also showed large and dark yellowflowers through M6 to M7 generations. The lines with High oleic acid and low saturated fatty acidcontents selected in M5 generation were maintained characteristics through M6 to M7 generationand these useful characteristics were expected for developing a new variety for bio diesel uses.
Abstract
To develop new varieties of rapeseed (Brassica napus L.), the seeds of three varieties,‘Naehan’, ‘Tammi’, and ‘Halla’ were irradiated with proton ion beams and gamma rays with 0 to2,000 Gy. We had selected 9 lines in M5 generation, and their useful characteristics were investigatedby progressing from M6 to M7 generation for checking uniformity and stability. The 9 lines selected inM5 generation were maintained their characteristics in terms of flowering date, maturing date, andplant height through M6 to M7 generations. Especially, 2 lines of NP600-1-1-198-2-1 and NP1000-13-2-362-4-1 selected in M5 generation derived from ‘Naehan’ had characteristics of early maturityand shorter stem than original variety, and they also were maintained characteristic of early maturitysuch as 10~11 days earlier flowering date and 6~9 days earlier maturing date through M6 toM7 generations. For stem length, they showed characteristics of shorter stem in 2 lines of NP600-1-1-198-2-1 line and NP1000-13-2-362-4-1 line about 16%, 25% shorter stem than original varietyrespectively through M6 to M7 generations. Furthermore, some characteristics of 2 lines comparedto the original variety were similar or higher in weight of 1,000 seeds, number of branches per plant,number of siliqua per panicle, number of seeds per silique, oil contents, and oleic acid contents. Theline with large and plump flowers selected in M5 generation also showed large and dark yellowflowers through M6 to M7 generations. The lines with High oleic acid and low saturated fatty acidcontents selected in M5 generation were maintained characteristics through M6 to M7 generationand these useful characteristics were expected for developing a new variety for bio diesel uses.
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