园艺与种苗
園藝與種苗
완예여충묘
Rain Fed Crops
2012年
1期
1-4,27
,共5页
高粱%杂交种亲本%遗传多样性%改良
高粱%雜交種親本%遺傳多樣性%改良
고량%잡교충친본%유전다양성%개량
Sorghum%Hybrid parent%Genetic diversity%Improvement
只有选育出优良的高粱亲本系,才能组配出优良的杂交种,且优良亲本系的选育必须具备选育亲本种质的遗传多样性。ICRISAT研究了727对高粱不育系、873个恢复系和1 451个品种的地理分布多样性和分类多样性,这些来自五大洲的选系分属5个高粱族和8个中间族。许多研究表明,高粱杂交种产量的不断提升是由杂交亲本的逐步改良获得的,是由加性遗传效应累积的结果。欲培育出优良的杂交亲本,必须增加选育种质材料的遗传宽度,提高其遗传多样性。
隻有選育齣優良的高粱親本繫,纔能組配齣優良的雜交種,且優良親本繫的選育必鬚具備選育親本種質的遺傳多樣性。ICRISAT研究瞭727對高粱不育繫、873箇恢複繫和1 451箇品種的地理分佈多樣性和分類多樣性,這些來自五大洲的選繫分屬5箇高粱族和8箇中間族。許多研究錶明,高粱雜交種產量的不斷提升是由雜交親本的逐步改良穫得的,是由加性遺傳效應纍積的結果。欲培育齣優良的雜交親本,必鬚增加選育種質材料的遺傳寬度,提高其遺傳多樣性。
지유선육출우량적고량친본계,재능조배출우량적잡교충,차우량친본계적선육필수구비선육친본충질적유전다양성。ICRISAT연구료727대고량불육계、873개회복계화1 451개품충적지리분포다양성화분류다양성,저사래자오대주적선계분속5개고량족화8개중간족。허다연구표명,고량잡교충산량적불단제승시유잡교친본적축보개량획득적,시유가성유전효응루적적결과。욕배육출우량적잡교친본,필수증가선육충질재료적유전관도,제고기유전다양성。
Only Selecting out good hybrid parents you can conbine elite hybrid in sorghum.Selecting good parent lines must have genetic diversity of germplasm.ICRISAT studied the geographic diversity as well as racial diversity of 727 pairs of A-lines,873 R-lines and 1 451 varieties.The result indicated that these breeding lines came from five continents,and belonged to five basic races and eight hybrid races.A lot of researches showed the increase in grain yield of sorghum hybrid was because of the improvement of hybrid parents constantly,and accumulation of additive effect.In order to breed good hybrid parents,we must increase the genetic beam and diversity.
