5个棉花纤维突变体的胚珠形态特征与农艺性状研究

The morphological and agronomic characters of five fiber mutants

以 TM- 1为对照 ,研究了 5个棉花纤维突变体的形态发生与农艺性状 .结果表明棉花纤维突变体胚珠纤维分化突起与对照 TM- 1同样首先发生在胚珠脊突处 ,然后是合点处及胚珠中部 ,最后在珠孔端 .有短绒有短纤维突变体 ( L i)与对照 TM- 1一样 ,以在开花当天 ( 0 DPA)突起为主 ;到开花后第 5日5DPA)短绒 (即第二批细胞 )突起 .无短绒有纤维的光籽 ( N1)在开花当天 ( 0 DPA)在合点附近有突起 ,开花后第 1日 ( 1DPA)仍有突起 .纤维突变体的衣分和衣指均较低 ,这是突变体产量低的主要原因 ,但突变体籽指较 TM- 1高 .突变体纤维的比强度较差 。

WT5”BZ]Five fiber mutants in upland cotton were compared to each other or with TM 1 in morphogenesis and agronomic character The results showed that protuberance of fiber cells from TM 1 ovule was first appeared at the funiculus crest, then spread from the chalazal cap to the micropylar, this situation was also observed in mutants with fiber or fuzz, such as Naked seed (N 1) and Ligon lintless (Li) Seed of Li mutant had no long fibers, only covered with fuzz and short fibers, of which short fibers were protruded from ovule at the day of flowering (0 DPA, DPA: Days Post Anthesis) and fuzz at 5 DPA Fuzzless mutant, also called as naked seed (N 1), had only long fibers, protuberance of its long fiber cells was first seen at 0 DPA, but could be continued to 1 DPA Lint yield of fiber mutant was lower since lint percentage or lint index was lower than normal type cotton TM 1,some of other traits,such as higher seed index,better fiber quality [WT5”HZ]