세포질적 유전자적 웅성불임을 이용한 벼 일대잡종 육성연구 I. 세포질적 유전자적 웅성불임계통 이용과 일대잡종 육성

서학수,이창은,허문회,Suh, Hak-Soo,Lee, Chang-Un,Heu, Mun-Hue 한국작물학회 1985 한국작물학회지 Vol.30 No.4

우리나라 수도 품종을 배경으로 한 세포질적 유전적 웅성불임계통들에 우리나라 품종의 임성회복친을 교잡시킨 HR1619A/남풍벼, HR1619A/가야벼, HR1619A/계통234, 통일A/남풍벼, 통일A/청청벼, 수원296A/계통209, 수원296A/계통237, 수원296A/계통252 및 계통201A/계통234 등 9개 Hybrid를 육성하고 이들의 수량 및 수량 구성요소, 흰빛잎마름병 저항성 및 미질을 조사하여 다음과 같은 결과를 얻었다. 1 공시된 9개 Hybrid들 중 계통201A/계통234, 통일A/남풍벼 및 HR 1619A/남풍벼 등 3개 Hybrid의 수량성이 높았는데 각각 우수친에 비해 36%, 17% 및 10%의 증수(Heterobeltiosis)를, 표준품종인 청청벼에 비해 각각 19%, 17% 및 14%의 증수(Standard Heterosis)를 보였다. 2. 공시된 Hybrid중 HR1619A/가야벼와 수원296A/계통237의 수량은 양친보다 낮았다. 3. 수량구성요소 중 수당입수의 잡종강세가 현저하였고 주당수수, 천립중 및 임실율의 잡종강세는 인정되지 않았다. 4. Hybrid의 흰빛잎마름병 저항성은 양친 중 강한친과 같은 반응을 보였다. 5. Hybrid들의 Amylose 함량은 20.8%∼24.7%였고 딘백질함량은 9.3%∼10.0%, 알칼리 붕괴도는 3.7∼7.0으로서 각각 양친품종과 비슷하였다.

세포질적 유전자적 웅성불임을 이용한 벼 일대잡종 육성방안 III. 유전자적 웅성불임계통을 이용한 일대잡종 벼의 수량과 미질

서학수,조영찬,Suh, Hak-Soo,Cho, Young-Chan 한국작물학회 1987 한국작물학회지 Vol.32 No.2

Eleven F$_1$ rice hybrids were developed by using the genetic male sterile lines having the backgrounds of Korean variety. The average heterosis, heterobeltiosis and standard heterosis for grain yield were 15.2%, 8.7% and 17.9%, respectively. Significant heterobe1tiosis for number of grains per panicle was observed. The leaf blast reaction of the hybrids was mostly similar to that of the more resistant parent. Amylose content of the hybrids ranged from 20.5% to 22.5% and protein content from 10.4% to 11.1%. The degrees of alkali digestion value, white center or white belly, clearance and heading date of the hybrids were almost same as their parents.

수도 한발저항성 품종 선발에 관한 연구

서학수,Hak-Soo SUH 한국작물학회 1979 Korean journal of crop science Vol.24 No.3

748개의 벼 품종을 파종하여 토양수분이 포화된 상태로 30일간 재배한 후 40일간 단수하여 한발을 조장한 다음 각 품종들의 한발에 대한 반응을 검정한 결과는 다음과 같다. 1. 한발처리기간 중 초장의 신장정도는 일본품종들이 가장 컸고 IRRI 도입품종, 한국재래품종 및 Indica / Japonica 품종 순이었다. 2. 한발처리후의 위조정도는 IRRI도입 품종들이 가장 경미하였고 일본도입품종, Indica / Japonica 품종 및 한국재래품종 순이었다. 3. 유묘기 내한성품종으로 원길조, 한양도, YR 52-$_{x}\textrm{BF}_7-67, Satominori, Mamoriaka, 적야난11004, 죽 홍난, IR 937-55-3, IR2735-F_3B-6-2, IR 2871-53-2, $_{x}\textrm{BFI76}^9/Dwan, Khoo Dook Mali-4-2-105, Os6, Palawan, IRAT10, TOS 2583 및 H-l05 등이 발달되었다. 4. 한발처리후의 조장, 조장신장량 및 초장신장율과 위조정도와는 높은 부의 상관이 인정되었다. 5. 한발처리후의 지상부 생체중, 건물중 및 수분함량과 위조정보와는 높은 부의 상관이 인정되었고 특히 수분함량과 위조정도와의 상관이 높았다.(r=0.860, n=21). 6. 한발처리후의 도열병발병과 위조정도와는 높은 정의 상관이 인정되었다. 7. 발아속도 및 처리전초장 (30일묘)과 내한성과는 상관이 없었다. Seven hundred and forty eight rice cultivars were screened for drought tolerance at seedling stage in a special green house. A number of cultivars such as Wonkiljo, Hanyangdo, YR 52-$_{x}\textrm{BF}_7-67, Satominori, Mamoriaka, Akanomochi 114, Thkebenimochi, IR 937-55-3, IR2735-F_3B-6-2, IR 2871-53-2, $_{x}\textrm{BFI76}^9/Dwan, Khoo lliok Mali-4-2-105, Os6, Palawan, IRAT10, TOS 2583 and H-l05 seemed to be tolerant to drought at seedling stage. There was negative correlation between drought resistance score and growth of plant height and water content of culm and leaf after drought treatment, and highly positive correlation between resistance to blast and resistance to drought at seedling stage. There was no relationship between drought resistance and germination speed, plant height before drought treatment.

Studies on multiple pistillate (polycaryoptic) male sterile rice

Hak Soo Suh(徐學洙) 한국육종학회 1985 한국육종학회지 Vol.17 No.4

The multiple pistillate rices selected from the combination HR 1619-6-2-1-2-2/ Double Rice were crossed to the cytoplasmic male sterile rice HR 1619 A having the WA cytoplasm. The F₁ plants which showed male sterility were crossed again with the parental multiple pistillate lines. The multiple pistillate cytoplasmic male sterile (MPCMS) lines having semi-dwarfness could be selected from the backcross progenies. The number of panicles per hill and the number of florets per panicle of the MPCMS lines were not of difference from those of the cytoplasmic male sterile (CMS) lines with normal pistils. The multiple pistillate genetic male sterile (MPGMS) lines could be selected from the F₄ of the cross IR 36 ms/Double Rice. The less number of panicles per hill and the less number of florets per panicle were observed in the MPGMS lines than in the genetic male sterile (GMS) lines with normal pistils. The average seed set percent of the multiple pistillate male sterile lines in cytoplasmic or in genetic male sterile rices was statistically not higher than that of the male sterile lines having normal pistils. The lager variation of outcross rate was observed in the multiple pistillate male sterile rices than in the normal pistillate male sterile ones. The outcrossed seed set percent of the MPCMS and MPGMS lines ranged from 1.1% to 34.8% and from 0.4% to 40.5%, while that of the CMS and GMS lines from 1.2% to 21.3% and from 1.5% to 36.7% respectively.

The Segregation Mode of Plant Height in the Cross of Rice Varieties Ⅵ. Linkage Analysis of the Semi-dwarfness of the Rice Variety “Tongil”

HAK SOO SUH(徐學洙),MUN HUE HEU(許文會) 한국육종학회 1978 한국육종학회지 Vol.10 No.1

The twenty one marker genes of the rice genetic stocks, of which plant height was not allelic to the semi-dwarfness, were transferred to the semi-dwarf variety Tongil by two or three times back-crosses. The homozygous lines for the semi-dwarfness and marker genes were crossed to the allelic tall varieties a_nd the linkage relationships between the semi-dwarfness and the marker genes were studied. The semi-dwarf plant height of Tongil appeared to be controlled by a single recessive gene, designated as d-t, and to be allelic to the tall height of Binato, HP 736, 7037 and 7157. The semi-dwarf gene of Tongil was linked with the marker genes such as A, Pp, Pn, and Pau of the linkage group Ⅲ with the recombination values of 24.8%, 35.1%. 40.9% and 42.9% respectively. The arrangement of these genes are assumed as follows; d-t-A-Pp-Pn-Pau. The semi-dwarf marker lines having the genes wx, C, Cl, v, Ph+, lg, Pr, Pb, Pn, Pau, A+, g, Rc, gh, la, nl, bl, bc, gl, Bh, and Bf were bred.

Inheritance of blast resistance in three Indica rice cultivars

Hak Soo Suh(徐學洙),Mun Hue Heu(許文會),에푸 엘 누쿠(F.L. Nuque) 한국육종학회 1988 한국육종학회지 Vol.20 No.1

Three Indica rice cultivars Tetep, Ta-Poo-Cho-Z and Pankhari 203, which were resistant to the blast fungus Pyricularia oryzae, were crossed to a susceptible Korean rice cultivar Tongil. The resistant Indica rice cultivars were crossed each other for allelism test. The F₂s were screened against four races IA-61, IB-47, IC-27 and IH-1. Inheritance pattern, relationships between reactions to different races in the same F₂ plants, and allelism relationships were studied. The rice cultivar Tetep was found to convey three dominant resistance genes, Ta-Poo-Cho-Z one dominant and one recessive resistance genes, and Pankhari 203 one dominant resistance gene against those fungus races tested. The resistance gene of Pankhari 203 was common to one of the three resistance genes of Tetep. Thus, five reistance genes to blast fungus were found; three dominant genes from Tetep, one dominant and one recessive genes from Ta-Poo-Cho-Z.

韓國 在來 赤米 蒐集 및 特性 檢定 Ⅶ. 米質

Hak Soo Suh(徐學洙),Woon Goo Ha(河雲龜) 한국육종학회 1993 한국육종학회지 Vol.25 No.2

Grain quality such as chalkiness, alkali digestion value(ADV) and amylose content of the Korean red rices were tested. Mean degree of chalkiness of the long and short grain red rices was 1.5 and 0.5 respectively. Many of the Korean red rice lines were clear in grain appearance. Mean degree of ADV of long grain Korean red rices was 7.0 and was distributed continuously, however that of short grain red rices was distributed into two groups, one was low ADV group with degree of 1 to 3 and the other was high ADV group with degree of 7 to 9. Mean of amylose content of the long grain Korean red rices was 31.7% with range from 24.0% to 39.0%, however that of the short grain red rices was 27.1%, with range from 15.0% to 39.0%.

韓國 在來 赤米 蒐集 및 特性 檢定 Ⅲ. 韓國 在來赤米와 栽培벼 및 外國赤米와의 雜種親和性

Hak Soo Suh(徐學洙),Jun Hyeon Cho(趙埈賢),Mun Hue Heu(許文會) 한국육종학회 1992 한국육종학회지 Vol.24 No.4

This study is carried out to test affinity of the Korean red rices with Indica and Japonica cultivars, and with foriegn red rices. Two types of Korean red rices, long grain and short grain type, were crossed to the Indica cultivar IR 26 and IR 50, and to the Japonica cultivar Keumobyeo and Shin 2. The long grain type Korean red rice were crossed to the short grain type Korean red rices. Two types of Korean red rices were crossed to the Chinese red rices from Anhui province, 85-27 and 85-48, and to Javanica red rice Malagkit Sinaguing and Indica red rice Khonorullu. The F₁s of the crosses were grown in field condition, and spikelet fertility were investigated. Spikelet fertilities of the F₁s between the long grain Korean red rices and Indica testers IR 26 and IR 50 were 50.7% and 46.2%, and those between the long grain Korean red rices and Japonica testers Geumobyeo and Shin 2 were 21.4% and 32.3% respectively. Spikelet fertilities of the F₁s between the short grain Korean red rices and Indica testers IR 26 and IR 50 were 32.4% and 41.8%, and those between the short grain Korean red rices and Japonica testers Geumobyeo and Shin 2 were 54.2% and 64.8% respectively. Thus affinity of the long grain Korean red rices with Indica was closer than with Japonica and that of short grain Korean red rices with Japonica testers was closer than with Indica. The F₁s crossed between the long and short grain Korean red rices showed about 50% spikelet fertility. The F₁s between the long grain Korean red rices and the Chinese red rices from Anhui province showed almost normal fertilities. Thus, the long grain Korean red rices and the Chinese red rices from Anhui province were proved to be very close in affinity.

특별강연(特別講演) 및 학술연구(學術硏究) 발표요지(發表要旨) : 잡초벼의 생태적, 유전적 특성 구명

서학수 ( Hak Soo Suh ) 한국잡초학회 2004 한국잡초학회 별책(학술대회 초록집) Vol.24 No.1

벼의 出穗期와 wx-locus와의 連關

Hak Soo Suh(徐學洙),Young Jo Kim(金英祚) 한국육종학회 1987 한국육종학회지 Vol.19 No.1

The non-waxy rice variety IR54, which shows extremely late heading in Korea, was backcrossed four times to the waxy rice variety Suweon 290, which shows medium heading. In every backcross generations, the heterozygous plants for waxiness were selected and the recurrent parent IR54 was backcrossed to these selected heterozygous plants. The BC₃F₄ and BC₃F₄ population segregating in waxiness and heading days were grown in field conditions in 1985 and in 1986 respectively. The extremely late heading was proved to be single recessive character. Close linkage was found between the extremely late heading and non-waxiness. The recombination value between the locus for the extremely late heading and the wx-locus was calculated as 6.7% in the BC₃F₃ and 11.1% in the BC₃F₄ generation.