CAJ | 학술논문

本研究利用48个SSR标记将12个不育系(保持系)、8个恢复系划分为4个组群,并利用NC Ⅱ设计共配制96个组合,研究不同组群亲本配组的杂种优势表现.研究结果表明,不育系和恢复系分别被分为3和2个组群,共产生6种配组模式,两系主栽不育系X扬稻6号类群恢复系(G2×G3)、三系保持系×三系恢复系(G4×G1)、扬稻6号类群不育系×三系恢复系(G3×G1)三类配组模式杂种优势明显.进一步研究显示遗传距离与杂种优势之间相关不显著.生育期是三系恢复系与两系主栽不育系配组(G2×G1)杂种低产的限制因子.扬稻6号类群不育系×三系恢复系(G3×G1)是一种新的杂种优势模式,因此,筛选、培育与扬稻6号属于同一类群的新型不育系,可进一步拓宽现有三系恢复系的利用范围,提高籼型杂种优势利用水平.
본연구이용48개SSR표기장12개불육계(보지계)、8개회복계화분위4개조군,병이용NC Ⅱ설계공배제96개조합,연구불동조군친본배조적잡충우세표현.연구결과표명,불육계화회복계분별피분위3화2개조군,공산생6충배조모식,량계주재불육계X양도6호류군회복계(G2×G3)、삼계보지계×삼계회복계(G4×G1)、양도6호류군불육계×삼계회복계(G3×G1)삼류배조모식잡충우세명현.진일보연구현시유전거리여잡충우세지간상관불현저.생육기시삼계회복계여량계주재불육계배조(G2×G1)잡충저산적한제인자.양도6호류군불육계×삼계회복계(G3×G1)시일충신적잡충우세모식,인차,사선、배육여양도6호속우동일류군적신형불육계,가진일보탁관현유삼계회복계적이용범위,제고선형잡충우세이용수평.
In this research,12 male sterile lines(maintainer lines)and 8 restorer lines were classified into 4 groups by using 48 SSR markers,and with NC Ⅱ(North Carolina Desin Ⅱ)genetic design,the tested lines were crossed into 96 combinations for heterosis study.The results showed that the male sterile lines and restorer lines were indived into three and two groups,respectively,as well as six kinds of combination patterns were obtained.The results indicated the manifestation of high degree of heterosis for the combinations of two-line male sterile lines and restorer lines of Yangdao6 group(namely G2×G3),three-line maintainer lines and three-line restorer lines(namely G4×G1),male sterile lines of Yangdao6 and three line restorer lines(namely G3×G1)among six kinds of combination patterns.Further research indicated no clear difference between genetic distance and hybrid heterosis were detected.Heading date was restrictive factor of low yield from the combination between two-line male sterile lines and three-line restorer lines(namely G2×G1).The combination pattern,male sterile lines of Yangdao6 group and three line restorer lines(namely G3×G1),was a kind of new heterosis pattern.Therefore,screening and breeding new male sterile lines belong to Yangdao6,further expand the range of use of three-line restorer lines and increase utilization level of rice heterosis.