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다양한 종자크기를 가진 Near Isogenic 수박 계통 육성 및 종자관련 특성 분석 KCI 등재

Development of Near Isogenic Lines with Various Seed Sizes and Study on Seed Size-related Characteristics in Watermelon

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한국육종학회지 (Korea Journal of Breeding Science)
한국육종학회 (The Korean Breeding Society)
초록

수박에서 종자크기가 다른 각 계통들간의 종자특성과 종자 크기의 변화에 따른 과특성을 살펴보기 위해 수박 유전자원 353 점을 대상으로 종자의 크기를 조사하고 6가지 대표적인 종자크기 형으로 분류하였으며 종자크기가 큰 순서부터 giant seed(GS), big seed(BS), medium size(NS), small size(SS), micro seed(MS), tomato seed(TS)라고 명명하였다. 종자크기가 작아질수록 종장, 종경이 작아졌고,

We inspected seed sizes of 353 genetic accessions of watermelon to diversify functional utility related to seed size and classified them into six representative groups based on their seed sizes. Each group was named as giant seed (GS), big seed (BS), medium size (NS), small size (SS), micro seed (MS) and tomato seed (TS) from the biggest. As the seed size was getting smaller, decreased seed length and seed width, increased seed number per fruit, and decreased seed weight per fruit were observed, but seed shape did not change significantly. In order to study the effect of seed size on fruit weight and seed germination, we developed three near isogenic lines (NILs) with three different seed sizes, SS, MS and TS, from crossing between two accessions 'NT' and 'TDR', and one NIL with seed size of TS from crossing between two accessions 'S55' and 'TDR'. In the study on the fruit weight of NILs with various seed sizes, NS, SS, MS, and TS NILs produced an average of 6.4, 6.3, 5.9, and 4.2 kg fruits, respectively. The bigger seed types showed the better germination rate. NS type showed the highest germination percentage, while TS showed very low germination percentage. Fermentation treatment for 48 hrs increased the germination percentage on TS type seed, but still remained at a low level. In NS, SS, and MS material, the ratio of embryo/whole seed weight was over 50%, meanwhile that of TS was only 44.4% of which low embryo percentage would be one of the reason of low germination percentage. From this study, we concluded that watermelon has very wide genetic diversity on seed size which is somehow related to fruit sizes and germination rate.

저자
  • 김용재(NH종묘센터) | Yong Jae Kim
  • 양태진(서울대학교 식물생산과학부) | Tae Jin Yang
  • 박영훈(부산대학교 원예생명과학과) | Young Hoon Park
  • 이용직(하나종묘) | Yong Jik Lee
  • 강순철(NH종묘센터) | Sun Cheol Kang
  • 김용권(NH종묘센터) | Yong Kwon Kim
  • 조정래(경상대학교 응용생명과학부) | Jeoung Lai Cho