棉 花 学 报     Cotton Science     2006，18(2)：83-88

Analysis on Genetic Variation of Agronomic and Economic Traits of Cotton in M₅ Progeny Irradiated by γ Ray
SUN Jun-ling¹，DU Xiong-ming^1*，SUN Qi-xin²，ZHOU Zhong-li¹，PAN Zhao-e¹，PANG Bao-yin¹
(1.Cotton Research Institute，CAAS，Key Laboratory of Cotton Genetic Improvement，Ministry of Agriculture ，Anyang Henan 455000，hina；2.China Agricultural University，Beijing 100094，China)

Abstract：The seeds of three cotton lines were irradiated by Co⁶⁰γ ray. Genetic variation of agronomic and economic traits of their M₅ progeny was analyzed. The results showed averages of variation coefficients were above 10.0% for boll weight，boll number per plant，height，fruit branch number and micronaire value of M₅ progenies of three varieties irradiated populations. The coefficient of variation (CV) of the phenotypic characters among M₅ colonies derived from three cotton varieties were very significant. The positive correlation between boll weight and 2.5% span length and fiber strength were significant at 0.01 or 0.05 levels in three varieties population of M₅ progenies. The correlation among other traits of three population of M₅ progenies were difference. 2.5% span length was the main factor in the first principal component. This clarified that the radiation of different cotton varieties resulted in the different of variation. and γ ray radiation can result in abundant genetic variation.
Key words：cotton；Co⁶⁰γ ray；agronomic and economic traits；genetic variation    [Full Text, 2477KB]