PDF(Pubmed)
Abstract：
Induced mutation for the creation of desirable traits through chronic gamma irradiation provides an opportunity for the selection and development of new chili varieties. This study was conducted to assess the effects of different doses of chronic gamma irradiation on morpho-physiological traits in chili. Ten plants from each variety were exposed to different doses of chronic gamma irradiation for 277.02 h at three weeks after germination under gamma greenhouse facilities, with accumulative dose; 185.61Gy, 83.11Gy, 47.096Gy, 30.474Gy, 19.4Gy, 13.9Gy, 11.1Gy, 8.31Gy, 5.54Gy) and 2.77Gy respectively. Highly significant differences were observed among doses (Rings) of chronic gamma irradiation expressed in mean values for all investigated traits. Relatively moderate doses of chronic gamma irradiation represented by doses 47.096 Gy (Ring 4) and 19.40 Gy (Ring 6) resulted in significant stimulation for most of the studied characters. The highest heritability was recorded in days to flowering at 99.88 while the lowest was observed in fruit dry weight at 34.66 %. High genetic advance were recorded for most of the quantitative traits studied. In addition, a highly significant positive correlation was observed between total fruit per plant, total number of fruit per plant, plant height, fruit fresh weight, number of secondary branches, chlorophyll a, fruit dry weight, total chlorophyll content, stem diameter, fruit length and fruit girth. With increasing chronic gamma dose, mutagenic efficiency and efficacy generally increased. Induced variety of desirable features will considerably increase the chilli\'s amelioration through mutation breeding, leading to the development of improved varieties. The results of this research offer valuable information for the use of chronic gamma radiation in the mutations breeding of Capsicum annuum L., which will be advantageous for future breeding programs.
摘要：
通过慢性伽马射线照射产生理想性状的诱导突变为选择和开发新的辣椒品种提供了机会。进行这项研究以评估不同剂量的慢性γ辐射对辣椒形态生理特性的影响。每个品种的10株植物在γ温室设施下发芽三周后暴露于不同剂量的慢性γ辐照277.02h，累积剂量；185.61Gy，83.11Gy,47.096Gy,30.474Gy,19.4Gy,13.9Gy,11.1Gy,8.31Gy,分别为5.54Gy）和2.77Gy。在所有研究性状的平均值表示的慢性γ辐射剂量（环）之间观察到高度显着差异。以剂量47.096Gy（第4环）和19.40Gy（第6环）表示的相对中等剂量的慢性伽马射线照射对大多数研究特征产生了显着刺激。在99.88开花的几天内记录到最高的遗传力，而在果实干重中观察到的最低遗传力为34.66％。对于所研究的大多数数量性状，都记录了很高的遗传进展。此外,观察到单株总果实之间存在高度显著的正相关，每株植物的果实总数，植物高度,水果鲜重,二级分支机构的数量，叶绿素a,水果干重，总叶绿素含量，阀杆直径,果长和果围。随着慢性γ剂量的增加，诱变效率和功效普遍增加。诱导的各种理想的特征将大大增加辣椒的改善通过突变育种，导致了良种的发展。这项研究的结果为在辣椒的突变育种中使用慢性γ辐射提供了有价值的信息，这将有利于未来的育种计划。
