两系亚种间杂交稻光合产物分配与籽粒充实度的研究  

STUDY ON THE DISTRIBUTION OF PHOTOSYNTHETIC PRODUCTS AND PLUMPNESS OF TWO LINE INTERSUBSPECIFIC HYBRID RICE

作　　者：王化新[1] 张仲良[1] 任光澡 吴素琼[1] 陈志渝[1] 

机构地区：[1]四川农业大学原子能农业应用研究室

出　　处：《核农学报》1996年第3期166-172,共7页Journal of Nuclear Agricultural Sciences

摘　　要：利用放射性（１４ＣＯ２）示踪技术对两系亚种间杂交稻光合产物分配与籽粒充实度的关系进行了研究。结果表明，齐穗后３０ｄ测定，２８９２Ｓ／Ｍｓｉｎｃｈｕ５３（Ｆ１）１４Ｃ光合产物向籽粒运转分配的比率较亲本Ｍｓｉｎｃｈｕ５３（♂）低１１９９％；滞留于茎鞘、叶和枝梗的比率较亲本高４倍左右，是该杂交组合籽粒充实度差的原因之一。库源比高结实率低，源的供应不足，是该杂交组合籽粒充实度差的另一原因。在源库之间物质运转效率不高，库源流不协调，库容量未能及时得到满足，影响籽粒干物质积累，也是该杂交组合籽粒充实度差的原因。２８９２Ｓ／花广５４９（Ｆ１）、２８９２Ｓ／１６１１（Ｆ１）与各自亲本花广５４９（♂）、１６１１（♂）相比，１４Ｃ光合产物向籽粒运转分配的比率较高，库源流协调性好，籽粒较充实，空秕率较低。The correlation between the distribution of photosynthetic products and plumpness of the two line intersubspecific hybrid rice was studied with the aid of 14 C tracer technique. The results showed that the rate of 14 C photosynthetic products translocated in the grains of the 2892S/Msinchu 53 (F 1) cross was 11.99% lower and in the stem, sheath,leaves and stalk were about four times higher than that of its parent when measured thirty days after full heading stage and this was one of the factors contributing to the poor plumpness of this cross. The high rate of sink to source, low rate of seed setting and insufficient source supply was other factors. Furthermore, the poor plumpness was also due to the blocked source supply. On the contrary, the rates of 14 C photosynthetic products translocated in the grains of the 2892S/Huaguang 549 (F 1) and 2892S/1611 (F 1) crosses were higher than that of their parents. Correspondingly,the plumpness was better than that of their parents.

关 键 词：杂交水稻 光合产物分配 籽粒充实度 种间杂交 

分 类 号：S511.035.1[农业科学—作物学]