Thailand maize population biology and agronomical characteristics research report early
Pick to: to speed up improvement in existing maize germplasm and its variety breeding rate, promote foreign material use process, from Thailand to introduction of the 12 corn groups of agronomic characters, yield, resistance, appearance is carries on the examination. The results show that, 12 corn stalks are Thailand group flatten type, plant height 219.15 ~ 234.06 cm, ear a 96.87 ~ 128.84 cm high; 12 group than controls output varieties, including the 25 th group the highest yield of 7463.01 kg/ha, group Q12 yield for the lowest 6418.31 kg/ha, the results of variance analysis showed that group the 25 th, Q2, percentile, Q4 is prevented, Q7, Q8, Q6, between the Q9 yield difference was not significant, but Q5 with groups, Q10, Q11, the yield difference between the Q12 reached significant level; Each group of the seed rate, grain bulk density, spike thick, spike length, spike line number less difference; -seed-weight 275.67 ~ 307.00 g; Do all reached the grain number 30 grain, bald pointed length range 0.70 1.34 cm; 12 a corn groups, WenKuBing as the main diseases and bacterial wilt, KangDaoXing groups are strong; Average grain are yellow, ear for type cylinder, belong to hard the shape of corn, SuiZhou is white.
Keywords: Thailand maize population; Agronomic characters; Yield; Resistance; appearance
Germplasm resources is the important material base breeding corn, through the germplasm mining, improvement and innovation to solve the current maize breeding and production problems is made of high and stable corn further important way [1]. The introduction of foreign good modified germplasm in the current breeding materials, is to improve the creative ability of science and technology of China corn effective means [2, 3]. Thailand's climate, corn production conditions and guangxi basic consistent, maize breeding objectives, tend to be the same. In recent years, Thailand many maize population bred, these groups have high (disease resistance, resistance to lodging, drought resistance, resistance to insects), exterior quality excellent, strong sex good and many other advantages, is the base material of fine breeding corn [4]. This study from Thailand to introduction of the December corn groups of agronomic characters, yield, resistance and appearance quality of biology and agronomical characteristics evaluation [5], in order to understand the character of each group performance and the yield potential for improvement and utilization of the introduction of Thailand maize population provide a reference basis, to speed up improvement of guangxi seed breeding hybrid corn and its current speed have larger stimulative effect.
1 materials and methods
2008 ~ 2009 2 years to Thailand introduced four made 12 corn group (in the 25 th, Q2... Q12 said) and guangxi main varieties zhengda 619 (CK) field planting observation experiments, the complete randomized to design, four lines area, President wide and 4.0 m x 0.7 m, 20 (each line, 3 times repeat, a total of 48 neighborhood. Each district at random 10 strains of plant height and determination of ear position high; The harvest is the center of the community in line 2 project,-grain weight and the determination, bulk density and the seed rate; When KaoZhong random take 10 spike the spike length, diameter, ear number per line, line, grain number, bald pointed length; The key period survey of the major disease, disease level and number of lodging, incidence of a disease = number number/investigation of x 100%, incidence of 10% ~ 15% recorded as moderate, or more than 15% for severe, less than 10% for mild.
2 results and the analysis
2.1 December corn group the comparison of the growth in Thailand by table 1, it is known that the period of 12 groups there is a certain difference, groups and the earliest Q7 spins a wide, respectively, for 71 and 73 d, followed by Q6, Q11 and Q12, tasseling are 72 d, in silking stage are
