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The new technique of interspecific hybridization was created in Gossypium, which could remarkably overcome abortion of interspecific hybridization and hybrid sterility of F1. A large number of germplasm resources were obtained from seventy cross combinations among the cultivated species and between the cultivated and the 14 wild species, respectively. 8 varieties have been developed, of which 4 were from the cross combination of G . hirsutum×G . arboretum and the other are the first breed from the hybrids between G . hirsutum and 4 wild species, respectively. Of them Shiyuan 321 (jimian 24) is a new variety which had the highest increase in the national Yellow River Valley Regional test, with planting area added up to 933333 ha in the recent three years. The breeding system of interspecific hybridization was established.  相似文献   
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The new technique of interspecific hybridization was created in Gossypium, which could remarkably overcome abortion of interspecific hybridization and hybrid sterility of F1. A large number of germplasm resources were obtained from seventy cross combinations among the cultivated species and between the cultivated and the 14 wild species, respectively. 8 varieties have been developed, of which 4 were from the cross combination of G. hirsutumXG. arboretum and the other are the first breed from the hybrids between G. hirsutum and 4 wild species, respectively. Of them Shiyuan 321 (jimian 24) is a new variety which had the highest increase in the national Yellow River Valley Regional test, with planting area added up to 933333 ha in the recent three years. The breeding system of interspecific hybridization was established.  相似文献   
3.
本文报道了陆地棉和中棉间正、反交时,喷施植物激素(GA_3、NAA)后,对杂种胚胎发育的影响。观察发现:1.外源激素对棉花授粉受精速度的影响不显著。2.陆地棉×中棉时,外源激素显著提高了有胚胚珠百分率。胚体大小也显著增加。3.中棉×陆地棉时,外源激素能明显地促进胚的分化,使一部分杂种胚的分化接近正常状态。4.喷施外源激素是克服种间杂交不亲和性的有效途径。这是由于外源激素促进了胚乳发育的缘故。  相似文献   
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棉花种间杂交技术创新及育种程序的建立   总被引:5,自引:0,他引:5  
创立的棉属种间杂交新方案对克服杂交不孕及F1不育性取得重大进展;获得了栽培种间(4n与2n)70个组合及陆地棉与14个野生棉种间大批量的高代种质资源,并已育成8个新品种,4个来自陆地棉×中棉,另外4个来自陆地棉与4种野生棉的杂种,为我国首次育成,其中石远321(冀棉24)为近年来国家区试中增产幅度最大的新品种,3年累计推广933.3×103 hm2.建成了有效的种间杂交育种体系.  相似文献   
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