ﻣﻘﺎﯾﺴﻪ ﻋﻤﻠﮑﺮد ﺷﮑﺮ و درﺻﺪ ﺳﺎﻗﻪ روي ﻓﺎﻣﯿﻞ ﻫﺎي ﻧﯿﻤﻪ ﺧﻮاﻫﺮي ﭼﻐﻨﺪرﻗﻨﺪ

Comparison of sugar yield and bolting percentage in sugar beet half-sib families

ﮐﺸﺖ ﭘﺎﯾﯿﺰه ﭼﻐﻨﺪرﻗﻨﺪ ﺑﺪﻟﯿﻞ ﭘﺘﺎﻧﺴﯿﻞ ﺑﺎﻻي ﺗﻮﻟﯿﺪ، اﺳﺘﻔﺎده ﮐﺎﻣﻞ از ﺑﺎرﻧﺪﮔﯽ ﻫﺎي ﻓﺼﻠﯽ و ﻧﯿﺎز آﺑﯽ ﮐﻢ آن ﺑﺮ ﮐﺸﺖ ﺑﻬﺎره ﺑﺮﺗﺮي دارد. ﺑﻪ دﻟﯿﻞ وﺟﻮد ﺷﺮاﯾﻂ اﻗﻠﯿﻤﯽ ﺧﺎص در ﻣﻨﺎﻃﻖ ﮐﺸﺖ ﭘﺎﯾﯿﺰه، ﺷﻨﺎﺳﺎﯾﯽ و ﻣﻌﺮﻓﯽ ارﻗﺎم ﻣﻘﺎوم ﺑﻪ ﺳﺎﻗﻪ روي ﺑﺮاي اﯾﻦ ﻣﻨﺎﻃﻖ از اﻫﻤﯿﺖ ﺧﺎﺻﯽ ﺑﺮﺧﻮردار اﺳﺖ. در اﯾﻦ ﺗﺤﻘﯿﻖ، ﺗﻌﺪاد 87 ﻓﺎﻣﯿﻞ ﻧﯿﻤﻪ ﺧﻮاﻫﺮي ﭼﻐﻨﺪرﻗﻨﺪ ﺑﻪ ﻫﻤﺮا دو ﺷﺎﻫﺪ داﺧﻠﯽ و ﯾﮏ ﺷﺎﻫﺪ ﺧﺎرﺟﯽ از ﻧﻈﺮ ﺻﻔﺎت ﻋﻤﻠﮑﺮد ﺷﮑﺮ و درﺻﺪ ﺳﺎﻗﻪ روي در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ ﺳﻪ ﺗﮑﺮار ﻣﻮرد ﻣﻘﺎﯾﺴﻪ ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﻧﺘﺎﯾﺞ ﺗﺠﺰﯾﻪ وارﯾﺎﻧﺲ ﺣﺎﮐﯽ از ﺗﻔﺎوت ﻣﻌﻨﯽ دار ﺑﯿﻦ ژﻧﻮﺗﯿﭗ ﻫﺎي ﻣﻮرد ﺑﺮرﺳﯽ از ﻧﻈﺮ ﺻﻔﺎت ﻋﻤﻠﮑﺮ ﺷﮑﺮ و درﺻﺪ ﺳﺎﻗﻪ روي ﺑﻮد. ﻣﯿﺰان ﺳﺎﻗﻪ روي در ﺣﺪود 70 درﺻﺪ از ﻓﺎﻣﯿﻞ ﻫﺎي ﻧﯿﻤﻪ ﺧﻮاﻫﺮي ﺑﺮاﺑﺮ ﺻﻔﺮ و در 18/3 درﺻﺪ ﻧﯿﺰ ﮐﻤﺘﺮ از 10 درﺻﺪ ﮔﺰارش ﺷﺪ ﮐﻪ ﺣﺎﮐﯽ از ﭘﯿﺸﺮﻓﺖ در ﺑﺮﻧﺎﻣﻪ اﺻﻼﺣﯽ ﻣﯽ ﺑﺎﺷﺪ. ژﻧﻮﺗﯿﭗ ﻫﺎي ﺑﺮﺗﺮ در ﺑﺮﻧﺎﻣﻪ ﻫﺎي اﺻﻼﺣﯽ آﯾﻨﺪه اﺳﺘﻔﺎده ﺧﻮاﻫﻨﺪ ﺷﺪ.

Autumn sowing of sugar beet is superior to spring one because of its high production potential, seasonal rainfall occurrence, and low water requirement. Due to the specific climatic condition in autumn sowing regions, recognition and introduction of bolting-resistant cultivars is important. In this study, 87 half-sib families of sugar beet together with two domestic and one foreign controls were compared in terms of sugar yield and bolting percentage in a randomized complete block design with three replications. Analysis of variance results showed significant difference among studied genotypes in terms of sugar yield and bolting percentage. Bolting percentage was reported for zero and less than 10% in about 70% and 18.3% of half-sister families, respectively indicating improvement in the breeding program. The selected genotypes will be used in future breeding programs.